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2017 lines
86 KiB
OpenSCAD
2017 lines
86 KiB
OpenSCAD
//////////////////////////////////////////////////////////////////////
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// LibFile: distributors.scad
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// Functions and modules to distribute children or copies of children onto
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// a line, a grid, or an arbitrary path. The $idx mechanism means that
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// the "copies" of children can vary. Also includes shortcuts for mirroring.
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// Includes:
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// include <BOSL2/std.scad>
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// FileGroup: Basic Modeling
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// FileSummary: Copy or distribute objects onto a line, grid, or path. Mirror shortcuts.
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// FileFootnotes: STD=Included in std.scad
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//////////////////////////////////////////////////////////////////////
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// Section: Adaptive Children Using `$` Variables
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// The distributor methods create multiple copies of their children and place them in various ways. While there are many occasions where
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// a model demands multiple identical copies of an object, this framework is more powerful than
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// might be immediately obvious because of `$` variables. The distributors set `$` variables that the children can use to change their
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// behavior from one child to the next within a single distributor invocation. This means the copies need not be identical.
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// The {{xcopies()}} module sets `$idx` to the index number of the copy, and in the examples below we use `$idx`, but the various
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// distributors offer a variety of `$` variables that you can use in your children. Check the "Side Effects" section for each module
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// to learn what variables that module provides.
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// .
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// Two gotchas may lead to models that don't behave as expected. While `if` statements work to control modules, you cannot
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// use them to make variable assignments in your child object. If you write a statement like
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// ```
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// if (condition) { c="red";}
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// else {c="green";}
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// ```
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// then the `c` variable is set only in the scope of the `if` and `else` clauses and is not available later on when you actually
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// try to use it. Instead you must use the ternary operator and write:
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// ```
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// c = condition ? "red" : "green";
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// ```
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// The second complication is
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// that in OpenSCAD version 2021.01 and earlier, assignments in children were executed before their parent. This means
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// that `$` variables like `$idx` are not available in assignments because the parent hasn't run to set them, so if you use them
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// you will get a warning about an unknown variable.
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// Two workarounds exist, neither of which are needed in newer versions of OpenSCAD. The workarounds solve the problem because
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// **modules** execute after their parent, so the `$` variables **are** available in modules. You can put your assignments
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// in a `let()` module, or you can wrap your child in a `union()`. Both methods appear below.
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// Figure(2D,NoScales): This example shows how we can use `$idx` to produce **different** geometry at each index.
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// xcopies(n=10, spacing=10)
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// text(str($idx));
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// Continues:
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// ```
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// xcopies(n=10, spacing=10)
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// text(str($idx));
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// ```
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// Figure(2D,NoScales): Here the children are sometimes squares and sometimes circles as determined by the conditional `if` module. This use of `if` is OK because no variables are assigned.
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// xcopies(n=4, spacing=10)
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// if($idx%2==0) circle(r=3,$fn=16);
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// else rect(6);
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// Continues:
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// ```
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// xcopies(n=4, spacing=10)
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// if($idx%2==0) circle(r=3,$fn=16);
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// else rect(6);
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// ```
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// Figure(2D,NoScales): Suppose we would like to color odd and even index copies differently. In this example we compute the color for a given child from `$idx` using the ternary operator. The `let()` module is a module that sets variables and makes them available to its children. Note that multiple assignments in `let()` are separated by commas, not semicolons.
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// xcopies(n=6, spacing=10){
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// let(c = $idx % 2 == 0 ? "red" : "green")
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// color(c) rect(6);
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// }
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// Continues:
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// ```
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// xcopies(n=6, spacing=10){
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// let(c = $idx % 2 == 0 ? "red" : "green")
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// color(c) rect(6);
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// }
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// ```
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// Figure(2D,NoScales): This example shows how you can change the position of children adaptively. If you want to avoid repeating your code for each case, this requires storing a transformation matrix in a variable and then applying it using `multmatrix()`. We wrap our code in `union()` to ensure that it works in OpenSCAD 2021.01.
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// xcopies(n=5,spacing=10)
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// union()
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// {
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// shiftback = $idx%2==0 ? back(10) : IDENT;
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// spin = zrot(180*$idx/4);
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// multmatrix(shiftback*spin) stroke([[-4,0],[4,0]],endcap2="arrow2",width=3/4, color="red");
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// }
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// Continues:
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// ```
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// xcopies(n=5,spacing=10)
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// union()
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// {
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// shiftback = $idx%2==0 ? back(10) : IDENT;
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// spin = zrot(180*$idx/4);
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// multmatrix(shiftback*spin) stroke([[-4,0],[4,0]],endcap2="arrow2",width=3/4,color="red");
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// }
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// ```
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//////////////////////////////////////////////////////////////////////
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// Section: Translating copies of all the children
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//////////////////////////////////////////////////////////////////////
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// Function&Module: move_copies()
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//
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// Usage:
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// move_copies(a) CHILDREN;
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// Usage: As a function to translate points, VNF, or Bezier patches
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// copies = move_copies(a, p=);
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// Usage: Get Translation Matrices
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// mats = move_copies(a);
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//
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// Topics: Transformations, Distributors, Copiers
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//
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// Description:
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// When called as a module, translates copies of all children to each given translation offset.
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// When called as a function, with no `p=` argument, returns a list of transformation matrices, one for each copy.
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// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
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//
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// Arguments:
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// a = Array of XYZ offset vectors. Default `[[0,0,0]]`
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// ---
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// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
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//
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// Side Effects:
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// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
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// `$idx` is set to the index number of each child being copied.
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//
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// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
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//
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// Example:
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// #sphere(r=10);
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// move_copies([[-25,-25,0], [25,-25,0], [0,0,50], [0,25,0]]) sphere(r=10);
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module move_copies(a=[[0,0,0]])
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{
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req_children($children);
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assert(is_list(a));
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for ($idx = idx(a)) {
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$pos = a[$idx];
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assert(is_vector($pos),"move_copies offsets should be a 2d or 3d vector.");
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translate($pos) children();
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}
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}
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function move_copies(a=[[0,0,0]],p=_NO_ARG) =
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assert(is_list(a))
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let(
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mats = [
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for (pos = a)
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assert(is_vector(pos),"move_copies offsets should be a 2d or 3d vector.")
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translate(pos)
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]
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)
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p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
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// Function&Module: xcopies()
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//
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// Usage:
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// xcopies(spacing, [n], [sp]) CHILDREN;
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// xcopies(l, [n], [sp]) CHILDREN;
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// xcopies(LIST) CHILDREN;
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// Usage: As a function to translate points, VNF, or Bezier patches
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// copies = xcopies(spacing, [n], [sp], p=);
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// copies = xcopies(l, [n], [sp], p=);
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// copies = xcopies(LIST, p=);
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// Usage: Get Translation Matrices
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// mats = xcopies(spacing, [n], [sp]);
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// mats = xcopies(l, [n], [sp]);
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// mats = xcopies(LIST);
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//
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// Topics: Transformations, Distributors, Copiers
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//
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// Description:
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// When called as a module, places `n` copies of the children along a line on the X axis.
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// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
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// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
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//
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// Arguments:
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// ---
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// spacing = Given a scalar, specifies a uniform spacing between copies. Given a list of scalars, each one gives a specific position along the line. (Default: 1.0)
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// n = Number of copies to place. (Default: 2)
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// l = Length to place copies over.
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// sp = If given as a point, copies will be placed on a line to the right of starting position `sp`. If given as a scalar, copies will be placed on a line segment to the right of starting position `[sp,0,0]`. If not given, copies will be placed along a line segment that is centered at [0,0,0].
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// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
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//
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// Side Effects:
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// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
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// `$idx` is set to the index number of each child being copied.
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//
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// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
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//
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// Examples:
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// xcopies(20) sphere(3);
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// xcopies(20, n=3) sphere(3);
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// xcopies(spacing=15, l=50) sphere(3);
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// xcopies(n=4, l=30, sp=[0,10,0]) sphere(3);
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// Example:
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// xcopies(10, n=3) {
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// cube(size=[1,3,1],center=true);
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// cube(size=[3,1,1],center=true);
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// }
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// Example:
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// xcopies([1,2,3,5,7]) sphere(d=1);
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module xcopies(spacing, n, l, sp)
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{
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assert(is_undef(n) || num_defined([l,spacing])==1, "When n is given must give exactly one of spacing or l")
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assert(is_def(n) || num_defined([l,spacing])>=1, "When n is not given must give at least one of spacing or l")
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req_children($children);
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dir = RIGHT;
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sp = is_finite(sp)? (sp*dir) : sp;
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if (is_vector(spacing)) {
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translate(default(sp,[0,0,0])) {
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for (i = idx(spacing)) {
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$idx = i;
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$pos = spacing[i]*dir;
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translate($pos) children();
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}
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}
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} else {
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line_copies(
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l=u_mul(l,dir),
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spacing=u_mul(spacing,dir),
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n=n, p1=sp
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) children();
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}
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}
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function xcopies(spacing, n, l, sp, p=_NO_ARG) =
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assert(is_undef(n) || num_defined([l,spacing])==1, "When n is given must give exactly one of spacing or l")
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assert(is_def(n) || num_defined([l,spacing])>=1, "When n is not given must give at least one of spacing or l")
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let(
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dir = RIGHT,
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sp = is_finite(sp)? (sp*dir) : sp,
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mats = is_vector(spacing)
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? let(sp = default(sp,[0,0,0])) [for (n = spacing) translate(sp + n*dir)]
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: line_copies(l=u_mul(l,dir), spacing=u_mul(spacing,dir), n=n, p1=sp)
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)
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p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
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// Function&Module: ycopies()
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//
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// Usage:
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// ycopies(spacing, [n], [sp]) CHILDREN;
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// ycopies(l, [n], [sp]) CHILDREN;
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// ycopies(LIST) CHILDREN;
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// Usage: As a function to translate points, VNF, or Bezier patches
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// copies = ycopies(spacing, [n], [sp], p=);
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// copies = ycopies(l, [n], [sp], p=);
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// copies = ycopies(LIST, p=);
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// Usage: Get Translation Matrices
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// mats = ycopies(spacing, [n], [sp]);
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// mats = ycopies(l, [n], [sp]);
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// mats = ycopies(LIST);
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//
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// Topics: Transformations, Distributors, Copiers
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//
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// Description:
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// When called as a module, places `n` copies of the children along a line on the Y axis.
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// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
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// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
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//
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// Arguments:
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// ---
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// spacing = Given a scalar, specifies a uniform spacing between copies. Given a list of scalars, each one gives a specific position along the line. (Default: 1.0)
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// n = Number of copies to place on the line. (Default: 2)
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// l = Length to place copies over.
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// sp = If given as a point, copies will be place on a line back from starting position `sp`. If given as a scalar, copies will be placed on a line back from starting position `[0,sp,0]`. If not given, copies will be placed along a line that is centered at [0,0,0].
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// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
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//
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// Side Effects:
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// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
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// `$idx` is set to the index number of each child being copied.
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//
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// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
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//
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// Examples:
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// ycopies(20) sphere(3);
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// ycopies(20, n=3) sphere(3);
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// ycopies(spacing=15, l=50) sphere(3);
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// ycopies(n=4, l=30, sp=[10,0,0]) sphere(3);
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// Example:
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// ycopies(10, n=3) {
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// cube(size=[1,3,1],center=true);
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// cube(size=[3,1,1],center=true);
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// }
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// Example:
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// ycopies([1,2,3,5,7]) sphere(d=1);
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module ycopies(spacing, n, l, sp)
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{
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assert(is_undef(n) || num_defined([l,spacing])==1, "When n is given must give exactly one of spacing or l")
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assert(is_def(n) || num_defined([l,spacing])>=1, "When n is not given must give at least one of spacing or l")
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req_children($children);
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dir = BACK;
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sp = is_finite(sp)? (sp*dir) : sp;
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if (is_vector(spacing)) {
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translate(default(sp,[0,0,0])) {
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for (i = idx(spacing)) {
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$idx = i;
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$pos = spacing[i]*dir;
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translate($pos) children();
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}
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}
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} else {
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line_copies(
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l=u_mul(l,dir),
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spacing=u_mul(spacing,dir),
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n=n, p1=sp
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) children();
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}
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}
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function ycopies(spacing, n, l, sp, p=_NO_ARG) =
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assert(is_undef(n) || num_defined([l,spacing])==1, "When n is given must give exactly one of spacing or l")
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assert(is_def(n) || num_defined([l,spacing])>=1, "When n is not given must give at least one of spacing or l")
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let(
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dir = BACK,
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sp = is_finite(sp)? (sp*dir) : sp,
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mats = is_vector(spacing)
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? let(sp = default(sp,[0,0,0])) [for (n = spacing) translate(sp + n*dir)]
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: line_copies(l=u_mul(l,dir), spacing=u_mul(spacing,dir), n=n, p1=sp)
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)
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p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
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// Function&Module: zcopies()
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//
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// Usage:
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// zcopies(spacing, [n], [sp]) CHILDREN;
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// zcopies(l, [n], [sp]) CHILDREN;
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// zcopies(LIST) CHILDREN;
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// Usage: As a function to translate points, VNF, or Bezier patches
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// copies = zcopies(spacing, [n], [sp], p=);
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// copies = zcopies(l, [n], [sp], p=);
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// copies = zcopies(LIST, p=);
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// Usage: Get Translation Matrices
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// mats = zcopies(spacing, [n], [sp]);
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// mats = zcopies(l, [n], [sp]);
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// mats = zcopies(LIST);
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//
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// Topics: Transformations, Distributors, Copiers
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//
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// Description:
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// When called as a module, places `n` copies of the children along a line on the Z axis.
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// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
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// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
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//
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// Arguments:
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// ---
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// spacing = Given a scalar, specifies a uniform spacing between copies. Given a list of scalars, each one gives a specific position along the line. (Default: 1.0)
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// n = Number of copies to place. (Default: 2)
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// l = Length to place copies over.
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// sp = If given as a point, copies will be placed on a line up from starting position `sp`. If given as a scalar, copies will be placed on a line up from starting position `[0,0,sp]`. If not given, copies will be placed on a line that is centered at [0,0,0].
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// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
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//
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// Side Effects:
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// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
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// `$idx` is set to the index number of each child being copied.
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//
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// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
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//
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// Examples:
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// zcopies(20) sphere(3);
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// zcopies(20, n=3) sphere(3);
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// zcopies(spacing=15, l=50) sphere(3);
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// zcopies(n=4, l=30, sp=[10,0,0]) sphere(3);
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// Example:
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// zcopies(10, n=3) {
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// cube(size=[1,3,1],center=true);
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// cube(size=[3,1,1],center=true);
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// }
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// Example: Cubic sphere packing
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// s = 20;
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// s2 = s * sin(45);
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// zcopies(s2,n=8)
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// grid_copies([s2,s2],n=8,stagger=($idx%2)? true : "alt")
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// sphere(d=s);
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// Example: Hexagonal sphere packing
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// s = 20;
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// xyr = adj_ang_to_hyp(s/2,30);
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// h = hyp_adj_to_opp(s,xyr);
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// zcopies(h,n=8)
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// back(($idx%2)*xyr*cos(60))
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// grid_copies(s,n=[12,7],stagger=($idx%2)? "alt" : true)
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// sphere(d=s);
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// Example:
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// zcopies([1,2,3,5,7]) sphere(d=1);
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module zcopies(spacing, n, l, sp)
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{
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assert(is_undef(n) || num_defined([l,spacing])==1, "When n is given must give exactly one of spacing or l")
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assert(is_def(n) || num_defined([l,spacing])>=1, "When n is not given must give at least one of spacing or l")
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req_children($children);
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dir = UP;
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sp = is_finite(sp)? (sp*dir) : sp;
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if (is_vector(spacing)) {
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translate(default(sp,[0,0,0])) {
|
|
for (i = idx(spacing)) {
|
|
$idx = i;
|
|
$pos = spacing[i]*dir;
|
|
translate($pos) children();
|
|
}
|
|
}
|
|
} else {
|
|
line_copies(
|
|
l=u_mul(l,dir),
|
|
spacing=u_mul(spacing,dir),
|
|
n=n, p1=sp
|
|
) children();
|
|
}
|
|
}
|
|
|
|
|
|
function zcopies(spacing, n, l, sp, p=_NO_ARG) =
|
|
assert(is_undef(n) || num_defined([l,spacing])==1, "When n is given must give exactly one of spacing or l")
|
|
assert(is_def(n) || num_defined([l,spacing])>=1, "When n is not given must give at least one of spacing or l")
|
|
let(
|
|
dir = UP,
|
|
sp = is_finite(sp)? (sp*dir) : sp,
|
|
mats = is_vector(spacing)
|
|
? let(sp = default(sp,[0,0,0])) [for (n = spacing) translate(sp + n*dir)]
|
|
: line_copies(l=u_mul(l,dir), spacing=u_mul(spacing,dir), n=n, p1=sp)
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
|
|
// Function&Module: line_copies()
|
|
//
|
|
// Usage: Place `n` copies at a given spacing along the line
|
|
// line_copies(spacing, [n], [p1=]) CHILDREN;
|
|
// Usage: Place as many copies as will fit at a given spacing
|
|
// line_copies(spacing, [l=], [p1=]) CHILDREN;
|
|
// Usage: Place `n` copies along the length of the line
|
|
// line_copies([n=], [l=], [p1=]) CHILDREN;
|
|
// Usage: Place `n` copies along the line from `p1` to `p2`
|
|
// line_copies([n=], [p1=], [p2=]) CHILDREN;
|
|
// Usage: Place copies at the given spacing, centered along the line from `p1` to `p2`
|
|
// line_copies([spacing], [p1=], [p2=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = line_copies([spacing], [n], [p1=], p=);
|
|
// copies = line_copies([spacing], [l=], [p1=], p=);
|
|
// copies = line_copies([n=], [l=], [p1=], p=);
|
|
// copies = line_copies([n=], [p1=], [p2=], p=);
|
|
// copies = line_copies([spacing], [p1=], [p2=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = line_copies([spacing], [n], [p1=]);
|
|
// mats = line_copies([spacing], [l=], [p1=]);
|
|
// mats = line_copies([n=], [l=], [p1=]);
|
|
// mats = line_copies([n=], [p1=], [p2=]);
|
|
// mats = line_copies([spacing], [p1=], [p2=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
// When called as a module, copies `children()` at one or more evenly spaced positions along a line.
|
|
// By default, the line will be centered at the origin, unless the starting point `p1` is given.
|
|
// The line will be pointed towards `RIGHT` (X+) unless otherwise given as a vector in `l`,
|
|
// `spacing`, or `p1`/`p2`. The psotion of the copies is specified in one of several ways:
|
|
// .
|
|
// If You Know... | Then Use Something Like...
|
|
// -------------------------------- | --------------------------------
|
|
// Spacing distance, Count | `line_copies(spacing=10, n=5) ...` or `line_copies(10, n=5) ...`
|
|
// Spacing vector, Count | `line_copies(spacing=[10,5], n=5) ...` or `line_copies([10,5], n=5) ...`
|
|
// Spacing distance, Line length | `line_copies(spacing=10, l=50) ...` or `line_copies(10, l=50) ...`
|
|
// Spacing distance, Line vector | `line_copies(spacing=10, l=[50,30]) ...` or `line_copies(10, l=[50,30]) ...`
|
|
// Spacing vector, Line length | `line_copies(spacing=[10,5], l=50) ...` or `line_copies([10,5], l=50) ...`
|
|
// Line length, Count | `line_copies(l=50, n=5) ...`
|
|
// Line vector, Count | `line_copies(l=[50,40], n=5) ...`
|
|
// Line endpoints, Count | `line_copies(p1=[10,10], p2=[60,-10], n=5) ...`
|
|
// Line endpoints, Spacing distance | `line_copies(p1=[10,10], p2=[60,-10], spacing=10) ...`
|
|
//
|
|
// Arguments:
|
|
// spacing = Either the scalar spacing distance along the X+ direction, or the vector giving both the direction and spacing distance between each set of copies.
|
|
// n = Number of copies to distribute along the line. (Default: 2)
|
|
// ---
|
|
// l = Either the scalar length of the line, or a vector giving both the direction and length of the line.
|
|
// p1 = If given, specifies the starting point of the line.
|
|
// p2 = If given with `p1`, specifies the ending point of line, and indirectly calculates the line length.
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
|
|
// `$idx` is set to the index number of each child being copied.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Examples:
|
|
// line_copies(10) sphere(d=1.5);
|
|
// line_copies(10, n=5) sphere(d=3);
|
|
// line_copies([10,5], n=5) sphere(d=3);
|
|
// line_copies(spacing=10, n=6) sphere(d=3);
|
|
// line_copies(spacing=[10,5], n=6) sphere(d=3);
|
|
// line_copies(spacing=10, l=50) sphere(d=3);
|
|
// line_copies(spacing=10, l=[50,30]) sphere(d=3);
|
|
// line_copies(spacing=[10,5], l=50) sphere(d=3);
|
|
// line_copies(l=50, n=4) sphere(d=3);
|
|
// line_copies(l=[50,-30], n=4) sphere(d=3);
|
|
// Example(FlatSpin,VPD=133):
|
|
// line_copies(p1=[0,0,0], p2=[5,5,20], n=6) cuboid([3,2,1]);
|
|
// Example(FlatSpin,VPD=133):
|
|
// line_copies(p1=[0,0,0], p2=[5,5,20], spacing=6) cuboid([3,2,1]);
|
|
// Example: All children are copied to each position
|
|
// line_copies(l=20, n=3) {
|
|
// cube(size=[1,3,1],center=true);
|
|
// cube(size=[3,1,1],center=true);
|
|
// }
|
|
// Example(2D): The functional form of line_copies() returns a list of transform matrices.
|
|
// mats = line_copies([10,5],n=5);
|
|
// for (m = mats) multmatrix(m) circle(d=3);
|
|
// Example(2D): The functional form of line_copies() returns a list of points if given a point.
|
|
// pts = line_copies([10,5],n=5,p=[0,0,0]);
|
|
// move_copies(pts) circle(d=3);
|
|
|
|
module line_of(spacing, n, l, p1, p2) {
|
|
deprecate("line_copies");
|
|
line_copies(spacing, n, l, p1, p2) children();
|
|
}
|
|
|
|
module line_copies(spacing, n, l, p1, p2)
|
|
{
|
|
req_children($children);
|
|
pts = line_copies(spacing=spacing, n=n, l=l, p1=p1, p2=p2, p=[0,0,0]);
|
|
for (i=idx(pts)) {
|
|
$idx = i;
|
|
$pos = pts[i];
|
|
translate($pos) children();
|
|
}
|
|
}
|
|
|
|
function line_copies(spacing, n, l, p1, p2, p=_NO_ARG) =
|
|
assert(is_undef(spacing) || is_finite(spacing) || is_vector(spacing))
|
|
assert(is_undef(n) || is_finite(n))
|
|
assert(is_undef(l) || is_finite(l) || is_vector(l))
|
|
assert(is_undef(p1) || is_vector(p1))
|
|
assert(is_undef(p2) || is_vector(p2))
|
|
assert(is_undef(p2) || is_def(p1), "If p2 is given must also give p1")
|
|
assert(is_undef(p2) || is_undef(l), "Cannot give both p2 and l")
|
|
assert(is_undef(n) || num_defined([l,spacing,p2])==1,"If n is given then must give exactly one of 'l', 'spacing', or the 'p1'/'p2' pair")
|
|
assert(is_def(n) || num_defined([l,spacing,p2])>=1,"If n is given then must give at least one of 'l', 'spacing', or the 'p1'/'p2' pair")
|
|
let(
|
|
ll = is_def(l)? scalar_vec3(l, 0)
|
|
: is_def(spacing) && is_def(n)? (n-1) * scalar_vec3(spacing, 0)
|
|
: is_def(p1) && is_def(p2)? point3d(p2-p1)
|
|
: undef,
|
|
cnt = is_def(n)? n
|
|
: is_def(spacing) && is_def(ll) ? floor(norm(ll) / norm(scalar_vec3(spacing, 0)) + 1.000001)
|
|
: 2,
|
|
spc = cnt<=1? [0,0,0]
|
|
: is_undef(spacing) && is_def(ll)? ll/(cnt-1)
|
|
: is_num(spacing) && is_def(ll)? (ll/(cnt-1))
|
|
: scalar_vec3(spacing, 0)
|
|
)
|
|
assert(!is_undef(cnt), "Need two of `spacing`, 'l', 'n', or `p1`/`p2` arguments in `line_copies()`.")
|
|
let( spos = !is_undef(p1)? point3d(p1) : -(cnt-1)/2 * spc )
|
|
[for (i=[0:1:cnt-1]) translate(i * spc + spos, p=p)];
|
|
|
|
|
|
|
|
// Function&Module: grid_copies()
|
|
//
|
|
// Usage:
|
|
// grid_copies(spacing, size=, [stagger=], [scale=], [inside=]) CHILDREN;
|
|
// grid_copies(n=, size=, [stagger=], [scale=], [inside=]) CHILDREN;
|
|
// grid_copies(spacing, [n], [stagger=], [scale=], [inside=]) CHILDREN;
|
|
// grid_copies(n=, inside=, [stagger], [scale]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = grid_copies(spacing, size=, [stagger=], [scale=], [inside=], p=);
|
|
// copies = grid_copies(n=, size=, [stagger=], [scale=], [inside=], p=);
|
|
// copies = grid_copies(spacing, [n], [stagger=], [scale=], [inside=], p=);
|
|
// copies = grid_copies(n=, inside=, [stagger], [scale], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = grid_copies(spacing, size=, [stagger=], [scale=], [inside=]);
|
|
// mats = grid_copies(n=, size=, [stagger=], [scale=], [inside=]);
|
|
// mats = grid_copies(spacing, [n], [stagger=], [scale=], [inside=]);
|
|
// mats = grid_copies(n=, inside=, [stagger], [scale]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, makes a square or hexagonal grid of copies of children, with an optional masking polygon or region.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// spacing = Distance between copies in [X,Y] or scalar distance.
|
|
// n = How many columns and rows of copies to make. Can be given as `[COLS,ROWS]`, or just as a scalar that specifies both. If staggered, count both staggered and unstaggered columns and rows. Default: 2 (3 if staggered)
|
|
// size = The [X,Y] size to spread the copies over.
|
|
// ---
|
|
// stagger = If true, make a staggered (hexagonal) grid. If false, make square grid. If `"alt"`, makes alternate staggered pattern. Default: false
|
|
// inside = If given a list of polygon points, or a region, only creates copies whose center would be inside the polygon or region. Polygon can be concave and/or self crossing.
|
|
// nonzero = If inside is set to a polygon with self-crossings then use the nonzero method for deciding if points are in the polygon. Default: false
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
|
|
// `$col` is set to the integer column number for each child.
|
|
// `$row` is set to the integer row number for each child.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Examples:
|
|
// grid_copies(size=50, spacing=10) cylinder(d=10, h=1);
|
|
// grid_copies(size=50, spacing=[10,15]) cylinder(d=10, h=1);
|
|
// grid_copies(spacing=10, n=[13,7], stagger=true) cylinder(d=6, h=5);
|
|
// grid_copies(spacing=10, n=[13,7], stagger="alt") cylinder(d=6, h=5);
|
|
// grid_copies(size=50, n=11, stagger=true) cylinder(d=5, h=1);
|
|
//
|
|
// Example:
|
|
// poly = [[-25,-25], [25,25], [-25,25], [25,-25]];
|
|
// grid_copies(spacing=5, stagger=true, inside=poly)
|
|
// zrot(180/6) cylinder(d=5, h=1, $fn=6);
|
|
// %polygon(poly);
|
|
//
|
|
// Example: Using `$row` and `$col`
|
|
// grid_copies(spacing=8, n=8)
|
|
// color(($row+$col)%2?"black":"red")
|
|
// cube([8,8,0.01], center=false);
|
|
//
|
|
// Example: Makes a grid of hexagon pillars whose tops are all angled to reflect light at [0,0,50], if they were shiny.
|
|
// hexregion = circle(r=50.01,$fn=6);
|
|
// grid_copies(spacing=10, stagger=true, inside=hexregion)
|
|
// union() { // Needed for OpenSCAD 2021.01 as noted above
|
|
// ref_v = (unit([0,0,50]-point3d($pos)) + UP)/2;
|
|
// half_of(v=-ref_v, cp=[0,0,5])
|
|
// zrot(180/6)
|
|
// cylinder(h=20, d=10/cos(180/6)+0.01, $fn=6);
|
|
// }
|
|
|
|
module grid2d(spacing, n, size, stagger=false, inside=undef, nonzero)
|
|
{
|
|
deprecate("grid_copies");
|
|
grid_copies(spacing, n, size, stagger, inside, nonzero) children();
|
|
}
|
|
|
|
module grid_copies(spacing, n, size, stagger=false, inside=undef, nonzero)
|
|
{
|
|
req_children($children);
|
|
dummy = assert(in_list(stagger, [false, true, "alt"]));
|
|
bounds = is_undef(inside)? undef :
|
|
is_path(inside)? pointlist_bounds(inside) :
|
|
assert(is_region(inside))
|
|
pointlist_bounds(flatten(inside));
|
|
nonzero = is_path(inside) ? default(nonzero,false)
|
|
: assert(is_undef(nonzero), "nonzero only allowed if inside is a polygon")
|
|
false;
|
|
size = is_num(size)? [size, size] :
|
|
is_vector(size)? assert(len(size)==2) size :
|
|
bounds!=undef? [
|
|
for (i=[0:1]) 2*max(abs(bounds[0][i]),bounds[1][i])
|
|
] : undef;
|
|
spacing = is_num(spacing)? (
|
|
stagger!=false? polar_to_xy(spacing,60) :
|
|
[spacing,spacing]
|
|
) :
|
|
is_vector(spacing)? assert(len(spacing)==2) spacing :
|
|
size!=undef? (
|
|
is_num(n)? v_div(size,(n-1)*[1,1]) :
|
|
is_vector(n)? assert(len(n)==2) v_div(size,n-[1,1]) :
|
|
v_div(size,(stagger==false? [1,1] : [2,2]))
|
|
) :
|
|
undef;
|
|
n = is_num(n)? [n,n] :
|
|
is_vector(n)? assert(len(n)==2) n :
|
|
size!=undef && spacing!=undef? v_floor(v_div(size,spacing))+[1,1] :
|
|
[2,2];
|
|
offset = v_mul(spacing, n-[1,1])/2;
|
|
if (stagger == false) {
|
|
for (row = [0:1:n.y-1]) {
|
|
for (col = [0:1:n.x-1]) {
|
|
pos = v_mul([col,row],spacing) - offset;
|
|
if (
|
|
is_undef(inside) ||
|
|
(is_path(inside) && point_in_polygon(pos, inside, nonzero=nonzero)>=0) ||
|
|
(is_region(inside) && point_in_region(pos, inside)>=0)
|
|
) {
|
|
$col = col;
|
|
$row = row;
|
|
$pos = pos;
|
|
translate(pos) children();
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// stagger == true or stagger == "alt"
|
|
staggermod = (stagger == "alt")? 1 : 0;
|
|
cols1 = ceil(n.x/2);
|
|
cols2 = n.x - cols1;
|
|
for (row = [0:1:n.y-1]) {
|
|
rowcols = ((row%2) == staggermod)? cols1 : cols2;
|
|
if (rowcols > 0) {
|
|
for (col = [0:1:rowcols-1]) {
|
|
rowdx = (row%2 != staggermod)? spacing.x : 0;
|
|
pos = v_mul([2*col,row],spacing) + [rowdx,0] - offset;
|
|
if (
|
|
is_undef(inside) ||
|
|
(is_path(inside) && point_in_polygon(pos, inside, nonzero=nonzero)>=0) ||
|
|
(is_region(inside) && point_in_region(pos, inside)>=0)
|
|
) {
|
|
$col = col * 2 + ((row%2!=staggermod)? 1 : 0);
|
|
$row = row;
|
|
$pos = pos;
|
|
translate(pos) children();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function grid_copies(spacing, n, size, stagger=false, inside=undef, nonzero, p=_NO_ARG) =
|
|
let(
|
|
dummy = assert(in_list(stagger, [false, true, "alt"])),
|
|
bounds = is_undef(inside)? undef :
|
|
is_path(inside)? pointlist_bounds(inside) :
|
|
assert(is_region(inside))
|
|
pointlist_bounds(flatten(inside)),
|
|
nonzero = is_path(inside) ? default(nonzero,false)
|
|
: assert(is_undef(nonzero), "nonzero only allowed if inside is a polygon")
|
|
false,
|
|
size = is_num(size)? [size, size] :
|
|
is_vector(size)? assert(len(size)==2) size :
|
|
bounds!=undef? [
|
|
for (i=[0:1]) 2*max(abs(bounds[0][i]),bounds[1][i])
|
|
] : undef,
|
|
spacing = is_num(spacing)? (
|
|
stagger!=false? polar_to_xy(spacing,60) :
|
|
[spacing,spacing]
|
|
) :
|
|
is_vector(spacing)? assert(len(spacing)==2) spacing :
|
|
size!=undef? (
|
|
is_num(n)? v_div(size,(n-1)*[1,1]) :
|
|
is_vector(n)? assert(len(n)==2) v_div(size,n-[1,1]) :
|
|
v_div(size,(stagger==false? [1,1] : [2,2]))
|
|
) :
|
|
undef,
|
|
n = is_num(n)? [n,n] :
|
|
is_vector(n)? assert(len(n)==2) n :
|
|
size!=undef && spacing!=undef? v_floor(v_div(size,spacing))+[1,1] :
|
|
[2,2],
|
|
offset = v_mul(spacing, n-[1,1])/2,
|
|
mats = stagger == false
|
|
? [
|
|
for (row = [0:1:n.y-1], col = [0:1:n.x-1])
|
|
let( pos = v_mul([col,row],spacing) - offset )
|
|
if (
|
|
is_undef(inside) ||
|
|
(is_path(inside) && point_in_polygon(pos, inside, nonzero=nonzero)>=0) ||
|
|
(is_region(inside) && point_in_region(pos, inside)>=0)
|
|
)
|
|
translate(pos)
|
|
]
|
|
: // stagger == true or stagger == "alt"
|
|
let(
|
|
staggermod = (stagger == "alt")? 1 : 0,
|
|
cols1 = ceil(n.x/2),
|
|
cols2 = n.x - cols1
|
|
)
|
|
[
|
|
for (row = [0:1:n.y-1])
|
|
let( rowcols = ((row%2) == staggermod)? cols1 : cols2 )
|
|
if (rowcols > 0)
|
|
for (col = [0:1:rowcols-1])
|
|
let(
|
|
rowdx = (row%2 != staggermod)? spacing.x : 0,
|
|
pos = v_mul([2*col,row],spacing) + [rowdx,0] - offset
|
|
)
|
|
if (
|
|
is_undef(inside) ||
|
|
(is_path(inside) && point_in_polygon(pos, inside, nonzero=nonzero)>=0) ||
|
|
(is_region(inside) && point_in_region(pos, inside)>=0)
|
|
)
|
|
translate(pos)
|
|
]
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Section: Rotating copies of all children
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// Function&Module: rot_copies()
|
|
//
|
|
// Usage:
|
|
// rot_copies(rots, [cp=], [sa=], [delta=], [subrot=]) CHILDREN;
|
|
// rot_copies(rots, v, [cp=], [sa=], [delta=], [subrot=]) CHILDREN;
|
|
// rot_copies(n=, [v=], [cp=], [sa=], [delta=], [subrot=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = rot_copies(rots, [cp=], [sa=], [delta=], [subrot=], p=);
|
|
// copies = rot_copies(rots, v, [cp=], [sa=], [delta=], [subrot=], p=);
|
|
// copies = rot_copies(n=, [v=], [cp=], [sa=], [delta=], [subrot=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = rot_copies(rots, [cp=], [sa=], [delta=], [subrot=]);
|
|
// mats = rot_copies(rots, v, [cp=], [sa=], [delta=], [subrot=]);
|
|
// mats = rot_copies(n=, [v=], [cp=], [sa=], [delta=], [subrot=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module:
|
|
// - Given a list of [X,Y,Z] rotation angles in `rots`, rotates copies of the children to each of those angles, regardless of axis of rotation.
|
|
// - Given a list of scalar angles in `rots`, rotates copies of the children to each of those angles around the axis of rotation.
|
|
// - If given a vector `v`, that becomes the axis of rotation. Default axis of rotation is UP.
|
|
// - If given a count `n`, makes that many copies, rotated evenly around the axis.
|
|
// - If given an offset `delta`, translates each child by that amount before rotating them into place. This makes rings.
|
|
// - If given a centerpoint `cp`, centers the ring around that centerpoint.
|
|
// - If `subrot` is true, each child will be rotated in place to keep the same size towards the center when making rings.
|
|
// - The first (unrotated) copy will be placed at the relative starting angle `sa`.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// rots = A list of [X,Y,Z] rotation angles in degrees. If `v` is given, this will be a list of scalar angles in degrees to rotate around `v`.
|
|
// v = If given, this is the vector of the axis to rotate around.
|
|
// cp = Centerpoint to rotate around. Default: `[0,0,0]`
|
|
// ---
|
|
// n = Optional number of evenly distributed copies, rotated around the axis.
|
|
// sa = Starting angle, in degrees. For use with `n`. Angle is in degrees counter-clockwise. Default: 0
|
|
// delta = [X,Y,Z] amount to move away from cp before rotating. Makes rings of copies. Default: `[0,0,0]`
|
|
// subrot = If false, don't sub-rotate children as they are copied around the ring. Only makes sense when used with `delta`. Default: `true`
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$ang` is set to the rotation angle (or XYZ rotation triplet) of each child copy, and can be used to modify each child individually.
|
|
// `$idx` is set to the index value of each child copy.
|
|
// `$axis` is set to the axis to rotate around, if `rots` was given as a list of angles instead of a list of [X,Y,Z] rotation angles.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// #cylinder(h=20, r1=5, r2=0);
|
|
// rot_copies([[45,0,0],[0,45,90],[90,-45,270]]) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// rot_copies([45, 90, 135], v=DOWN+BACK)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// rot_copies(n=6, v=DOWN+BACK)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// rot_copies(n=6, v=DOWN+BACK, delta=[10,0,0])
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// rot_copies(n=6, v=UP+FWD, delta=[10,0,0], sa=45)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// rot_copies(n=6, v=DOWN+BACK, delta=[20,0,0], subrot=false)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
module rot_copies(rots=[], v=undef, cp=[0,0,0], n, sa=0, offset=0, delta=[0,0,0], subrot=true)
|
|
{
|
|
req_children($children);
|
|
sang = sa + offset;
|
|
angs = !is_undef(n)?
|
|
(n<=0? [] : [for (i=[0:1:n-1]) i/n*360+sang]) :
|
|
rots==[]? [] :
|
|
assert(!is_string(rots), "Argument rots must be an angle, a list of angles, or a range of angles.")
|
|
assert(!is_undef(rots[0]), "Argument rots must be an angle, a list of angles, or a range of angles.")
|
|
[for (a=rots) a];
|
|
for ($idx = idx(angs)) {
|
|
$ang = angs[$idx];
|
|
$axis = v;
|
|
translate(cp) {
|
|
rotate(a=$ang, v=v) {
|
|
translate(delta) {
|
|
rot(a=(subrot? sang : $ang), v=v, reverse=true) {
|
|
translate(-cp) {
|
|
children();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function rot_copies(rots=[], v, cp=[0,0,0], n, sa=0, offset=0, delta=[0,0,0], subrot=true, p=_NO_ARG) =
|
|
let(
|
|
sang = sa + offset,
|
|
angs = !is_undef(n)?
|
|
(n<=0? [] : [for (i=[0:1:n-1]) i/n*360+sang]) :
|
|
rots==[]? [] :
|
|
assert(!is_string(rots), "Argument rots must be an angle, a list of angles, or a range of angles.")
|
|
assert(!is_undef(rots[0]), "Argument rots must be an angle, a list of angles, or a range of angles.")
|
|
[for (a=rots) a],
|
|
mats = [
|
|
for (ang = angs)
|
|
translate(cp) *
|
|
rot(a=ang, v=v) *
|
|
translate(delta) *
|
|
rot(a=(subrot? sang : ang), v=v, reverse=true) *
|
|
translate(-cp)
|
|
]
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
// Function&Module: xrot_copies()
|
|
//
|
|
// Usage:
|
|
// xrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=]) CHILDREN;
|
|
// xrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = xrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=], p=);
|
|
// copies = xrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = xrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=]);
|
|
// mats = xrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module:
|
|
// - Given an array of angles, rotates copies of the children to each of those angles around the X axis.
|
|
// - If given a count `n`, makes that many copies, rotated evenly around the X axis.
|
|
// - If given a radius `r` (or diameter `d`), distributes children around a ring of that size around the X axis.
|
|
// - If given a centerpoint `cp`, centers the rotation around that centerpoint.
|
|
// - If `subrot` is true, each child will be rotated in place to keep the same size towards the center when making rings.
|
|
// - The first (unrotated) copy will be placed at the relative starting angle `sa`.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// rots = Optional array of rotation angles, in degrees, to make copies at.
|
|
// cp = Centerpoint to rotate around.
|
|
// ---
|
|
// n = Optional number of evenly distributed copies to be rotated around the ring.
|
|
// sa = Starting angle, in degrees. For use with `n`. Angle is in degrees counter-clockwise from Y+, when facing the origin from X+. First unrotated copy is placed at that angle.
|
|
// r = If given, makes a ring of child copies around the X axis, at the given radius. Default: 0
|
|
// d = If given, makes a ring of child copies around the X axis, at the given diameter.
|
|
// subrot = If false, don't sub-rotate children as they are copied around the ring.
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$idx` is set to the index value of each child copy.
|
|
// `$ang` is set to the rotation angle of each child copy, and can be used to modify each child individually.
|
|
// `$axis` is set to the axis vector rotated around.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// xrot_copies([180, 270, 315])
|
|
// cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// xrot_copies(n=6)
|
|
// cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// xrot_copies(n=6, r=10)
|
|
// xrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) xrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// xrot_copies(n=6, r=10, sa=45)
|
|
// xrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) xrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// xrot_copies(n=6, r=20, subrot=false)
|
|
// xrot(-90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
// color("red",0.333) xrot(-90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
module xrot_copies(rots=[], cp=[0,0,0], n, sa=0, r, d, subrot=true)
|
|
{
|
|
req_children($children);
|
|
r = get_radius(r=r, d=d, dflt=0);
|
|
rot_copies(rots=rots, v=RIGHT, cp=cp, n=n, sa=sa, delta=[0, r, 0], subrot=subrot) children();
|
|
}
|
|
|
|
|
|
function xrot_copies(rots=[], cp=[0,0,0], n, sa=0, r, d, subrot=true, p=_NO_ARG) =
|
|
let( r = get_radius(r=r, d=d, dflt=0) )
|
|
rot_copies(rots=rots, v=RIGHT, cp=cp, n=n, sa=sa, delta=[0, r, 0], subrot=subrot, p=p);
|
|
|
|
|
|
// Function&Module: yrot_copies()
|
|
//
|
|
// Usage:
|
|
// yrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=]) CHILDREN;
|
|
// yrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = yrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=], p=);
|
|
// copies = yrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = yrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=]);
|
|
// mats = yrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module:
|
|
// - Given an array of angles, rotates copies of the children to each of those angles around the Y axis.
|
|
// - If given a count `n`, makes that many copies, rotated evenly around the Y axis.
|
|
// - If given a radius `r` (or diameter `d`), distributes children around a ring of that size around the Y axis.
|
|
// - If given a centerpoint `cp`, centers the rotation around that centerpoint.
|
|
// - If `subrot` is true, each child will be rotated in place to keep the same size towards the center when making rings.
|
|
// - The first (unrotated) copy will be placed at the relative starting angle `sa`.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// rots = Optional array of rotation angles, in degrees, to make copies at.
|
|
// cp = Centerpoint to rotate around.
|
|
// ---
|
|
// n = Optional number of evenly distributed copies to be rotated around the ring.
|
|
// sa = Starting angle, in degrees. For use with `n`. Angle is in degrees counter-clockwise from X-, when facing the origin from Y+.
|
|
// r = If given, makes a ring of child copies around the Y axis, at the given radius. Default: 0
|
|
// d = If given, makes a ring of child copies around the Y axis, at the given diameter.
|
|
// subrot = If false, don't sub-rotate children as they are copied around the ring.
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$idx` is set to the index value of each child copy.
|
|
// `$ang` is set to the rotation angle of each child copy, and can be used to modify each child individually.
|
|
// `$axis` is set to the axis vector rotated around.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// yrot_copies([180, 270, 315])
|
|
// cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// yrot_copies(n=6)
|
|
// cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// yrot_copies(n=6, r=10)
|
|
// yrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// yrot_copies(n=6, r=10, sa=45)
|
|
// yrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(-90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// yrot_copies(n=6, r=20, subrot=false)
|
|
// yrot(-90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
// color("red",0.333) yrot(-90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
module yrot_copies(rots=[], cp=[0,0,0], n, sa=0, r, d, subrot=true)
|
|
{
|
|
req_children($children);
|
|
r = get_radius(r=r, d=d, dflt=0);
|
|
rot_copies(rots=rots, v=BACK, cp=cp, n=n, sa=sa, delta=[-r, 0, 0], subrot=subrot) children();
|
|
}
|
|
|
|
|
|
function yrot_copies(rots=[], cp=[0,0,0], n, sa=0, r, d, subrot=true, p=_NO_ARG) =
|
|
let( r = get_radius(r=r, d=d, dflt=0) )
|
|
rot_copies(rots=rots, v=BACK, cp=cp, n=n, sa=sa, delta=[-r, 0, 0], subrot=subrot, p=p);
|
|
|
|
|
|
// Function&Module: zrot_copies()
|
|
//
|
|
// Usage:
|
|
// zrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=]) CHILDREN;
|
|
// zrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = zrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=], p=);
|
|
// copies = zrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = zrot_copies(rots, [cp], [r=|d=], [sa=], [subrot=]);
|
|
// mats = zrot_copies(n=, [cp=], [r=|d=], [sa=], [subrot=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module:
|
|
// - Given an array of angles, rotates copies of the children to each of those angles around the Z axis.
|
|
// - If given a count `n`, makes that many copies, rotated evenly around the Z axis.
|
|
// - If given a radius `r` (or diameter `d`), distributes children around a ring of that size around the Z axis.
|
|
// - If given a centerpoint `cp`, centers the rotation around that centerpoint.
|
|
// - If `subrot` is true, each child will be rotated in place to keep the same size towards the center when making rings.
|
|
// - The first (unrotated) copy will be placed at the relative starting angle `sa`.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// rots = Optional array of rotation angles, in degrees, to make copies at.
|
|
// cp = Centerpoint to rotate around. Default: [0,0,0]
|
|
// ---
|
|
// n = Optional number of evenly distributed copies to be rotated around the ring.
|
|
// sa = Starting angle, in degrees. For use with `n`. Angle is in degrees counter-clockwise from X+, when facing the origin from Z+. Default: 0
|
|
// r = If given, makes a ring of child copies around the Z axis, at the given radius. Default: 0
|
|
// d = If given, makes a ring of child copies around the Z axis, at the given diameter.
|
|
// subrot = If false, don't sub-rotate children as they are copied around the ring. Default: true
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Side Effects:
|
|
// `$idx` is set to the index value of each child copy.
|
|
// `$ang` is set to the rotation angle of each child copy, and can be used to modify each child individually.
|
|
// `$axis` is set to the axis vector rotated around.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// zrot_copies([180, 270, 315])
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// zrot_copies(n=6)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// zrot_copies(n=6, r=10)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0);
|
|
//
|
|
// Example:
|
|
// zrot_copies(n=6, r=20, sa=45)
|
|
// yrot(90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
// color("red",0.333) yrot(90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
//
|
|
// Example:
|
|
// zrot_copies(n=6, r=20, subrot=false)
|
|
// yrot(-90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
// color("red",0.333) yrot(-90) cylinder(h=20, r1=5, r2=0, center=true);
|
|
module zrot_copies(rots=[], cp=[0,0,0], n, sa=0, r, d, subrot=true)
|
|
{
|
|
r = get_radius(r=r, d=d, dflt=0);
|
|
rot_copies(rots=rots, v=UP, cp=cp, n=n, sa=sa, delta=[r, 0, 0], subrot=subrot) children();
|
|
}
|
|
|
|
|
|
function zrot_copies(rots=[], cp=[0,0,0], n, sa=0, r, d, subrot=true, p=_NO_ARG) =
|
|
let( r = get_radius(r=r, d=d, dflt=0) )
|
|
rot_copies(rots=rots, v=UP, cp=cp, n=n, sa=sa, delta=[r, 0, 0], subrot=subrot, p=p);
|
|
|
|
|
|
// Function&Module: arc_copies()
|
|
//
|
|
// Usage:
|
|
// arc_copies(n, r|d=, [sa=], [ea=], [rot=]) CHILDREN;
|
|
// arc_copies(n, rx=|dx=, ry=|dy=, [sa=], [ea=], [rot=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = arc_copies(n, r|d=, [sa=], [ea=], [rot=], p=);
|
|
// copies = arc_copies(n, rx=|dx=, ry=|dy=, [sa=], [ea=], [rot=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = arc_copies(n, r|d=, [sa=], [ea=], [rot=]);
|
|
// mats = arc_copies(n, rx=|dx=, ry=|dy=, [sa=], [ea=], [rot=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, evenly distributes n duplicate children around an ovoid arc on the XY plane.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// n = number of copies to distribute around the circle. (Default: 6)
|
|
// r = radius of circle (Default: 1)
|
|
// ---
|
|
// rx = radius of ellipse on X axis. Used instead of r.
|
|
// ry = radius of ellipse on Y axis. Used instead of r.
|
|
// d = diameter of circle. (Default: 2)
|
|
// dx = diameter of ellipse on X axis. Used instead of d.
|
|
// dy = diameter of ellipse on Y axis. Used instead of d.
|
|
// rot = whether to rotate the copied children. (Default: true)
|
|
// sa = starting angle. (Default: 0.0)
|
|
// ea = ending angle. Will distribute copies CCW from sa to ea. (Default: 360.0)
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$ang` is set to the rotation angle of each child copy, and can be used to modify each child individually.
|
|
// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
|
|
// `$idx` is set to the index value of each child copy.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// #cube(size=[10,3,3],center=true);
|
|
// arc_copies(d=40, n=5) cube(size=[10,3,3],center=true);
|
|
//
|
|
// Example:
|
|
// #cube(size=[10,3,3],center=true);
|
|
// arc_copies(d=40, n=5, sa=45, ea=225) cube(size=[10,3,3],center=true);
|
|
//
|
|
// Example:
|
|
// #cube(size=[10,3,3],center=true);
|
|
// arc_copies(r=15, n=8, rot=false) cube(size=[10,3,3],center=true);
|
|
//
|
|
// Example:
|
|
// #cube(size=[10,3,3],center=true);
|
|
// arc_copies(rx=20, ry=10, n=8) cube(size=[10,3,3],center=true);
|
|
// Example(2D): Using `$idx` to alternate shapes
|
|
// arc_copies(r=50, n=19, sa=0, ea=180)
|
|
// if ($idx % 2 == 0) rect(6);
|
|
// else circle(d=6);
|
|
|
|
module arc_of(n=6,r,rx,ry,d,dx,dy,sa=0,ea=360,rot=true){
|
|
deprecate("arc_copies");
|
|
arc_copies(n,r,rx,ry,d,dx,dy,sa,ea,rot) children();
|
|
}
|
|
|
|
|
|
module arc_copies(
|
|
n=6,
|
|
r=undef,
|
|
rx=undef, ry=undef,
|
|
d=undef, dx=undef, dy=undef,
|
|
sa=0, ea=360,
|
|
rot=true
|
|
) {
|
|
req_children($children);
|
|
rx = get_radius(r1=rx, r=r, d1=dx, d=d, dflt=1);
|
|
ry = get_radius(r1=ry, r=r, d1=dy, d=d, dflt=1);
|
|
sa = posmod(sa, 360);
|
|
ea = posmod(ea, 360);
|
|
n = (abs(ea-sa)<0.01)?(n+1):n;
|
|
delt = (((ea<=sa)?360.0:0)+ea-sa)/(n-1);
|
|
for ($idx = [0:1:n-1]) {
|
|
$ang = sa + ($idx * delt);
|
|
$pos =[rx*cos($ang), ry*sin($ang), 0];
|
|
translate($pos) {
|
|
zrot(rot? atan2(ry*sin($ang), rx*cos($ang)) : 0) {
|
|
children();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function arc_copies(
|
|
n=6,
|
|
r=undef,
|
|
rx=undef, ry=undef,
|
|
d=undef, dx=undef, dy=undef,
|
|
sa=0, ea=360,
|
|
rot=true,
|
|
p=_NO_ARG
|
|
) =
|
|
let(
|
|
rx = get_radius(r1=rx, r=r, d1=dx, d=d, dflt=1),
|
|
ry = get_radius(r1=ry, r=r, d1=dy, d=d, dflt=1),
|
|
sa = posmod(sa, 360),
|
|
ea = posmod(ea, 360),
|
|
n = (abs(ea-sa)<0.01)?(n+1):n,
|
|
delt = (((ea<=sa)?360.0:0)+ea-sa)/(n-1),
|
|
mats = [
|
|
for (i = [0:1:n-1])
|
|
let(
|
|
ang = sa + (i * delt),
|
|
pos =[rx*cos(ang), ry*sin(ang), 0],
|
|
ang2 = rot? atan2(ry*sin(ang), rx*cos(ang)) : 0
|
|
)
|
|
translate(pos) * zrot(ang2)
|
|
]
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
|
|
// Function&Module: sphere_copies()
|
|
//
|
|
// Usage:
|
|
// sphere_copies(n, r|d=, [cone_ang=], [scale=], [perp=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = sphere_copies(n, r|d=, [cone_ang=], [scale=], [perp=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = sphere_copies(n, r|d=, [cone_ang=], [scale=], [perp=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, spreads children semi-evenly over the surface of a sphere or ellipsoid.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// n = How many copies to evenly spread over the surface.
|
|
// r = Radius of the sphere to distribute over
|
|
// ---
|
|
// d = Diameter of the sphere to distribute over
|
|
// cone_ang = Angle of the cone, in degrees, to limit how much of the sphere gets covered. For full sphere coverage, use 180. Measured pre-scaling. Default: 180
|
|
// scale = The [X,Y,Z] scaling factors to reshape the sphere being covered.
|
|
// perp = If true, rotate children to be perpendicular to the sphere surface. Default: true
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$pos` is set to the relative post-scaled centerpoint of each child copy, and can be used to modify each child individually.
|
|
// `$theta` is set to the theta angle of the child from the center of the sphere.
|
|
// `$phi` is set to the pre-scaled phi angle of the child from the center of the sphere.
|
|
// `$rad` is set to the pre-scaled radial distance of the child from the center of the sphere.
|
|
// `$idx` is set to the index number of each child being copied.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// sphere_copies(n=250, d=100, cone_ang=45, scale=[3,3,1])
|
|
// cylinder(d=10, h=10, center=false);
|
|
//
|
|
// Example:
|
|
// sphere_copies(n=500, d=100, cone_ang=180)
|
|
// color(unit(point3d(v_abs($pos))))
|
|
// cylinder(d=8, h=10, center=false);
|
|
|
|
module ovoid_spread(n=100, r=undef, d=undef, cone_ang=90, scale=[1,1,1], perp=true)
|
|
{
|
|
deprecate("sphere_copies");
|
|
sphere_copies(n,r,d,cone_ang,scale,perp) children();
|
|
}
|
|
|
|
|
|
module sphere_copies(n=100, r=undef, d=undef, cone_ang=90, scale=[1,1,1], perp=true)
|
|
{
|
|
req_children($children);
|
|
r = get_radius(r=r, d=d, dflt=50);
|
|
cnt = ceil(n / (cone_ang/180));
|
|
|
|
// Calculate an array of [theta,phi] angles for `n` number of
|
|
// points, almost evenly spaced across the surface of a sphere.
|
|
// This approximation is based on the golden spiral method.
|
|
theta_phis = [for (x=[0:1:n-1]) [180*(1+sqrt(5))*(x+0.5)%360, acos(1-2*(x+0.5)/cnt)]];
|
|
|
|
for ($idx = idx(theta_phis)) {
|
|
tp = theta_phis[$idx];
|
|
xyz = spherical_to_xyz(r, tp[0], tp[1]);
|
|
$pos = v_mul(xyz,point3d(scale,1));
|
|
$theta = tp[0];
|
|
$phi = tp[1];
|
|
$rad = r;
|
|
translate($pos) {
|
|
if (perp) {
|
|
rot(from=UP, to=xyz) children();
|
|
} else {
|
|
children();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function sphere_copies(n=100, r=undef, d=undef, cone_ang=90, scale=[1,1,1], perp=true, p=_NO_ARG) =
|
|
let(
|
|
r = get_radius(r=r, d=d, dflt=50),
|
|
cnt = ceil(n / (cone_ang/180)),
|
|
|
|
// Calculate an array of [theta,phi] angles for `n` number of
|
|
// points, almost evenly spaced across the surface of a sphere.
|
|
// This approximation is based on the golden spiral method.
|
|
theta_phis = [for (x=[0:1:n-1]) [180*(1+sqrt(5))*(x+0.5)%360, acos(1-2*(x+0.5)/cnt)]],
|
|
|
|
mats = [
|
|
for (tp = theta_phis)
|
|
let(
|
|
xyz = spherical_to_xyz(r, tp[0], tp[1]),
|
|
pos = v_mul(xyz,point3d(scale,1))
|
|
)
|
|
translate(pos) *
|
|
(perp? rot(from=UP, to=xyz) : ident(4))
|
|
]
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
|
|
// Section: Placing copies of all children on a path
|
|
|
|
|
|
// Function&Module: path_copies()
|
|
//
|
|
// Usage: Uniformly distribute copies
|
|
// path_copies(path, [n], [spacing], [sp], [rotate_children], [closed=]) CHILDREN;
|
|
// Usage: Place copies at specified locations
|
|
// path_copies(path, dist=, [rotate_children=], [closed=]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = path_copies(path, [n], [spacing], [sp], [rotate_children], [closed=], p=);
|
|
// copies = path_copies(path, dist=, [rotate_children=], [closed=], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = path_copies(path, [n], [spacing], [sp], [rotate_children], [closed=]);
|
|
// mats = path_copies(path, dist=, [rotate_children=], [closed=]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module:
|
|
// - Place copies all of the children at points along the path based on path length. You can specify `dist` as
|
|
// - a scalar or distance list and the children will be placed at the specified distances from the start of the path. Otherwise the children are
|
|
// - placed at uniformly spaced points along the path. If you specify `n` but not `spacing` then `n` copies will be placed
|
|
// - with one at path[0] if `closed` is true, or spanning the entire path from start to end if `closed` is false.
|
|
// - If you specify `spacing` but not `n` then copies will spread out starting from one set at path[0] for `closed=true` or at the path center for open paths.
|
|
// - If you specify `sp` then the copies will start at distance `sp` from the start of the path.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// path = path or 1-region where children are placed
|
|
// n = number of copies
|
|
// spacing = space between copies
|
|
// sp = if given, copies will start distance sp from the path start and spread beyond that point
|
|
// rotate_children = if true, rotate children to line up with curve normal. Default: true
|
|
// ---
|
|
// dist = Specify a list of distances to determine placement of children.
|
|
// closed = If true treat path as a closed curve. Default: false
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$pos` is set to the center of each copy
|
|
// `$idx` is set to the index number of each copy. In the case of closed paths the first copy is at `path[0]` unless you give `sp`.
|
|
// `$dir` is set to the direction vector of the path at the point where the copy is placed.
|
|
// `$normal` is set to the direction of the normal vector to the path direction that is coplanar with the path at this point
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example(2D):
|
|
// spiral = [for(theta=[0:360*8]) theta * [cos(theta), sin(theta)]]/100;
|
|
// stroke(spiral,width=.25);
|
|
// color("red") path_copies(spiral, n=100) circle(r=1);
|
|
// Example(2D):
|
|
// circle = regular_ngon(n=64, or=10);
|
|
// stroke(circle,width=1,closed=true);
|
|
// color("green") path_copies(circle, n=7, closed=true) circle(r=1+$idx/3);
|
|
// Example(2D):
|
|
// heptagon = regular_ngon(n=7, or=10);
|
|
// stroke(heptagon, width=1, closed=true);
|
|
// color("purple") path_copies(heptagon, n=9, closed=true) rect([0.5,3],anchor=FRONT);
|
|
// Example(2D): Direction at the corners is the average of the two adjacent edges
|
|
// heptagon = regular_ngon(n=7, or=10);
|
|
// stroke(heptagon, width=1, closed=true);
|
|
// color("purple") path_copies(heptagon, n=7, closed=true) rect([0.5,3],anchor=FRONT);
|
|
// Example(2D): Don't rotate the children
|
|
// heptagon = regular_ngon(n=7, or=10);
|
|
// stroke(heptagon, width=1, closed=true);
|
|
// color("red") path_copies(heptagon, n=9, closed=true, rotate_children=false) rect([0.5,3],anchor=FRONT);
|
|
// Example(2D): Open path, specify `n`
|
|
// sinwav = [for(theta=[0:360]) 5*[theta/180, sin(theta)]];
|
|
// stroke(sinwav,width=.1);
|
|
// color("red") path_copies(sinwav, n=5) rect([.2,1.5],anchor=FRONT);
|
|
// Example(2D): Open path, specify `n` and `spacing`
|
|
// sinwav = [for(theta=[0:360]) 5*[theta/180, sin(theta)]];
|
|
// stroke(sinwav,width=.1);
|
|
// color("red") path_copies(sinwav, n=5, spacing=1) rect([.2,1.5],anchor=FRONT);
|
|
// Example(2D): Closed path, specify `n` and `spacing`, copies centered around circle[0]
|
|
// circle = regular_ngon(n=64,or=10);
|
|
// stroke(circle,width=.1,closed=true);
|
|
// color("red") path_copies(circle, n=10, spacing=1, closed=true) rect([.2,1.5],anchor=FRONT);
|
|
// Example(2D): Open path, specify `spacing`
|
|
// sinwav = [for(theta=[0:360]) 5*[theta/180, sin(theta)]];
|
|
// stroke(sinwav,width=.1);
|
|
// color("red") path_copies(sinwav, spacing=5) rect([.2,1.5],anchor=FRONT);
|
|
// Example(2D): Open path, specify `sp`
|
|
// sinwav = [for(theta=[0:360]) 5*[theta/180, sin(theta)]];
|
|
// stroke(sinwav,width=.1);
|
|
// color("red") path_copies(sinwav, n=5, sp=18) rect([.2,1.5],anchor=FRONT);
|
|
// Example(2D): Open path, specify `dist`
|
|
// sinwav = [for(theta=[0:360]) 5*[theta/180, sin(theta)]];
|
|
// stroke(sinwav,width=.1);
|
|
// color("red") path_copies(sinwav, dist=[1,4,9,16]) rect([.2,1.5],anchor=FRONT);
|
|
// Example(2D):
|
|
// wedge = arc(angle=[0,100], r=10, $fn=64);
|
|
// difference(){
|
|
// polygon(concat([[0,0]],wedge));
|
|
// path_copies(wedge,n=5,spacing=3) fwd(.1) rect([1,4],anchor=FRONT);
|
|
// }
|
|
// Example(Spin,VPD=115): 3d example, with children rotated into the plane of the path
|
|
// tilted_circle = lift_plane([[0,0,0], [5,0,5], [0,2,3]],regular_ngon(n=64, or=12));
|
|
// path_sweep(regular_ngon(n=16,or=.1),tilted_circle);
|
|
// path_copies(tilted_circle, n=15,closed=true) {
|
|
// color("blue") cyl(h=3,r=.2, anchor=BOTTOM); // z-aligned cylinder
|
|
// color("red") xcyl(h=10,r=.2, anchor=FRONT+LEFT); // x-aligned cylinder
|
|
// }
|
|
// Example(Spin,VPD=115): 3d example, with rotate_children set to false
|
|
// tilted_circle = lift_plane([[0,0,0], [5,0,5], [0,2,3]], regular_ngon(n=64, or=12));
|
|
// path_sweep(regular_ngon(n=16,or=.1),tilted_circle);
|
|
// path_copies(tilted_circle, n=25,rotate_children=false,closed=true) {
|
|
// color("blue") cyl(h=3,r=.2, anchor=BOTTOM); // z-aligned cylinder
|
|
// color("red") xcyl(h=10,r=.2, anchor=FRONT+LEFT); // x-aligned cylinder
|
|
// }
|
|
|
|
module path_spread(path, n, spacing, sp=undef, rotate_children=true, dist, closed){
|
|
deprecate("path_copes");
|
|
path_copies(path,n,spacing,sp,dist,rotate_children,dist, closed) children();
|
|
}
|
|
|
|
|
|
module path_copies(path, n, spacing, sp=undef, dist, rotate_children=true, dist, closed)
|
|
{
|
|
req_children($children);
|
|
is_1reg = is_1region(path);
|
|
path = is_1reg ? path[0] : path;
|
|
closed = default(closed, is_1reg);
|
|
length = path_length(path,closed);
|
|
distind = is_def(dist) ? sortidx(dist) : undef;
|
|
distances =
|
|
is_def(dist) ? assert(is_undef(n) && is_undef(spacing) && is_undef(sp), "Can't use n, spacing or undef with dist")
|
|
select(dist,distind)
|
|
: is_def(sp)? ( // Start point given
|
|
is_def(n) && is_def(spacing)? count(n,sp,spacing) :
|
|
is_def(n)? lerpn(sp, length, n) :
|
|
list([sp:spacing:length])
|
|
)
|
|
: is_def(n) && is_undef(spacing)? lerpn(0,length,n,!closed) // N alone given
|
|
: ( // No start point and spacing is given, N maybe given
|
|
let(
|
|
n = is_def(n)? n : floor(length/spacing)+(closed?0:1),
|
|
ptlist = count(n,0,spacing),
|
|
listcenter = mean(ptlist)
|
|
) closed?
|
|
sort([for(entry=ptlist) posmod(entry-listcenter,length)]) :
|
|
[for(entry=ptlist) entry + length/2-listcenter ]
|
|
);
|
|
distOK = min(distances)>=0 && max(distances)<=length;
|
|
dummy = assert(distOK,"Cannot fit all of the copies");
|
|
cutlist = path_cut_points(path, distances, closed, direction=true);
|
|
planar = len(path[0])==2;
|
|
for(i=[0:1:len(cutlist)-1]) {
|
|
$pos = cutlist[i][0];
|
|
$idx = is_def(dist) ? distind[i] : i;
|
|
$dir = rotate_children ? (planar?[1,0]:[1,0,0]) : cutlist[i][2];
|
|
$normal = rotate_children? (planar?[0,1]:[0,0,1]) : cutlist[i][3];
|
|
translate($pos) {
|
|
if (rotate_children) {
|
|
if(planar) {
|
|
rot(from=[0,1],to=cutlist[i][3]) children();
|
|
} else {
|
|
frame_map(x=cutlist[i][2], z=cutlist[i][3])
|
|
children();
|
|
}
|
|
} else {
|
|
children();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function path_copies(path, n, spacing, sp=undef, dist, rotate_children=true, dist, closed, p=_NO_ARG) =
|
|
let(
|
|
is_1reg = is_1region(path),
|
|
path = is_1reg ? path[0] : path,
|
|
closed = default(closed, is_1reg),
|
|
length = path_length(path,closed),
|
|
distind = is_def(dist) ? sortidx(dist) : undef,
|
|
distances =
|
|
is_def(dist) ? assert(is_undef(n) && is_undef(spacing) && is_undef(sp), "Can't use n, spacing or undef with dist")
|
|
select(dist,distind)
|
|
: is_def(sp)? ( // Start point given
|
|
is_def(n) && is_def(spacing)? count(n,sp,spacing) :
|
|
is_def(n)? lerpn(sp, length, n) :
|
|
list([sp:spacing:length])
|
|
)
|
|
: is_def(n) && is_undef(spacing)? lerpn(0,length,n,!closed) // N alone given
|
|
: ( // No start point and spacing is given, N maybe given
|
|
let(
|
|
n = is_def(n)? n : floor(length/spacing)+(closed?0:1),
|
|
ptlist = count(n,0,spacing),
|
|
listcenter = mean(ptlist)
|
|
) closed?
|
|
sort([for(entry=ptlist) posmod(entry-listcenter,length)]) :
|
|
[for(entry=ptlist) entry + length/2-listcenter ]
|
|
),
|
|
distOK = min(distances)>=0 && max(distances)<=length,
|
|
dummy = assert(distOK,"Cannot fit all of the copies"),
|
|
cutlist = path_cut_points(path, distances, closed, direction=true),
|
|
planar = len(path[0])==2,
|
|
mats = [
|
|
for(i=[0:1:len(cutlist)-1])
|
|
translate(cutlist[i][0]) * (
|
|
!rotate_children? ident(4) :
|
|
planar? rot(from=[0,1],to=cutlist[i][3]) :
|
|
frame_map(x=cutlist[i][2], z=cutlist[i][3])
|
|
)
|
|
]
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Section: Making a copy of all children with reflection
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// Function&Module: xflip_copy()
|
|
//
|
|
// Usage:
|
|
// xflip_copy([offset], [x]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = xflip_copy([offset], [x], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = xflip_copy([offset], [x]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, makes a copy of the children, mirrored across the X axis.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// offset = Distance to offset children right, before copying.
|
|
// x = The X coordinate of the mirroring plane. Default: 0
|
|
// ---
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$orig` is true for the original instance of children. False for the copy.
|
|
// `$idx` is set to the index value of each copy.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// xflip_copy() yrot(90) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) cube([0.01,15,15], center=true);
|
|
//
|
|
// Example:
|
|
// xflip_copy(offset=5) yrot(90) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) cube([0.01,15,15], center=true);
|
|
//
|
|
// Example:
|
|
// xflip_copy(x=-5) yrot(90) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) left(5) cube([0.01,15,15], center=true);
|
|
module xflip_copy(offset=0, x=0)
|
|
{
|
|
req_children($children);
|
|
mirror_copy(v=[1,0,0], offset=offset, cp=[x,0,0]) children();
|
|
}
|
|
|
|
|
|
function xflip_copy(offset=0, x=0, p=_NO_ARG) =
|
|
mirror_copy(v=[1,0,0], offset=offset, cp=[x,0,0], p=p);
|
|
|
|
|
|
// Function&Module: yflip_copy()
|
|
//
|
|
// Usage:
|
|
// yflip_copy([offset], [y]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = yflip_copy([offset], [y], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = yflip_copy([offset], [y]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, makes a copy of the children, mirrored across the Y axis.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// offset = Distance to offset children back, before copying.
|
|
// y = The Y coordinate of the mirroring plane. Default: 0
|
|
// ---
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$orig` is true for the original instance of children. False for the copy.
|
|
// `$idx` is set to the index value of each copy.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// yflip_copy() xrot(-90) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) cube([15,0.01,15], center=true);
|
|
//
|
|
// Example:
|
|
// yflip_copy(offset=5) xrot(-90) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) cube([15,0.01,15], center=true);
|
|
//
|
|
// Example:
|
|
// yflip_copy(y=-5) xrot(-90) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) fwd(5) cube([15,0.01,15], center=true);
|
|
module yflip_copy(offset=0, y=0)
|
|
{
|
|
req_children($children);
|
|
mirror_copy(v=[0,1,0], offset=offset, cp=[0,y,0]) children();
|
|
}
|
|
|
|
|
|
function yflip_copy(offset=0, y=0, p=_NO_ARG) =
|
|
mirror_copy(v=[0,1,0], offset=offset, cp=[0,y,0], p=p);
|
|
|
|
|
|
// Function&Module: zflip_copy()
|
|
//
|
|
// Usage:
|
|
// zflip_copy([offset], [z]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = zflip_copy([offset], [z], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = zflip_copy([offset], [z]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, makes a copy of the children, mirrored across the Z axis.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// offset = Distance to offset children up, before copying.
|
|
// z = The Z coordinate of the mirroring plane. Default: 0
|
|
// ---
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$orig` is true for the original instance of children. False for the copy.
|
|
// `$idx` is set to the index value of each copy.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// zflip_copy() cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) cube([15,15,0.01], center=true);
|
|
//
|
|
// Example:
|
|
// zflip_copy(offset=5) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) cube([15,15,0.01], center=true);
|
|
//
|
|
// Example:
|
|
// zflip_copy(z=-5) cylinder(h=20, r1=4, r2=0);
|
|
// color("blue",0.25) down(5) cube([15,15,0.01], center=true);
|
|
module zflip_copy(offset=0, z=0)
|
|
{
|
|
req_children($children);
|
|
mirror_copy(v=[0,0,1], offset=offset, cp=[0,0,z]) children();
|
|
}
|
|
|
|
|
|
function zflip_copy(offset=0, z=0, p=_NO_ARG) =
|
|
mirror_copy(v=[0,0,1], offset=offset, cp=[0,0,z], p=p);
|
|
|
|
|
|
// Function&Module: mirror_copy()
|
|
//
|
|
// Usage:
|
|
// mirror_copy(v, [cp], [offset]) CHILDREN;
|
|
// Usage: As a function to translate points, VNF, or Bezier patches
|
|
// copies = mirror_copy(v, [cp], [offset], p=);
|
|
// Usage: Get Translation Matrices
|
|
// mats = mirror_copy(v, [cp], [offset]);
|
|
//
|
|
// Topics: Transformations, Distributors, Copiers
|
|
//
|
|
// Description:
|
|
// When called as a module, makes a copy of the children, mirrored across the given plane.
|
|
// When called as a function, *without* a `p=` argument, returns a list of transformation matrices, one for each copy.
|
|
// When called as a function, *with* a `p=` argument, returns a list of transformed copies of `p=`.
|
|
//
|
|
// Arguments:
|
|
// v = The normal vector of the plane to mirror across.
|
|
// offset = distance to offset away from the plane.
|
|
// cp = A point that lies on the mirroring plane.
|
|
// ---
|
|
// p = Either a point, pointlist, VNF or Bezier patch to be translated when used as a function.
|
|
//
|
|
// Side Effects:
|
|
// `$orig` is true for the original instance of children. False for the copy.
|
|
// `$idx` is set to the index value of each copy.
|
|
//
|
|
// See Also: move_copies(), xcopies(), ycopies(), zcopies(), line_copies(), rot_copies(), xrot_copies(), yrot_copies(), zrot_copies(), arc_copies(), sphere_copies()
|
|
//
|
|
// Example:
|
|
// mirror_copy([1,-1,0]) zrot(-45) yrot(90) cylinder(d1=10, d2=0, h=20);
|
|
// color("blue",0.25) zrot(-45) cube([0.01,15,15], center=true);
|
|
//
|
|
// Example:
|
|
// mirror_copy([1,1,0], offset=5) rot(a=90,v=[-1,1,0]) cylinder(d1=10, d2=0, h=20);
|
|
// color("blue",0.25) zrot(45) cube([0.01,15,15], center=true);
|
|
//
|
|
// Example:
|
|
// mirror_copy(UP+BACK, cp=[0,-5,-5]) rot(from=UP, to=BACK+UP) cylinder(d1=10, d2=0, h=20);
|
|
// color("blue",0.25) translate([0,-5,-5]) rot(from=UP, to=BACK+UP) cube([15,15,0.01], center=true);
|
|
module mirror_copy(v=[0,0,1], offset=0, cp)
|
|
{
|
|
req_children($children);
|
|
cp = is_vector(v,4)? plane_normal(v) * v[3] :
|
|
is_vector(cp)? cp :
|
|
is_num(cp)? cp*unit(v) :
|
|
[0,0,0];
|
|
nv = is_vector(v,4)? plane_normal(v) : unit(v);
|
|
off = nv*offset;
|
|
if (cp == [0,0,0]) {
|
|
translate(off) {
|
|
$orig = true;
|
|
$idx = 0;
|
|
children();
|
|
}
|
|
mirror(nv) translate(off) {
|
|
$orig = false;
|
|
$idx = 1;
|
|
children();
|
|
}
|
|
} else {
|
|
translate(off) children();
|
|
translate(cp) mirror(nv) translate(-cp) translate(off) children();
|
|
}
|
|
}
|
|
|
|
|
|
function mirror_copy(v=[0,0,1], offset=0, cp, p=_NO_ARG) =
|
|
let(
|
|
cp = is_vector(v,4)? plane_normal(v) * v[3] :
|
|
is_vector(cp)? cp :
|
|
is_num(cp)? cp*unit(v) :
|
|
[0,0,0],
|
|
nv = is_vector(v,4)? plane_normal(v) : unit(v),
|
|
off = nv*offset,
|
|
mats = [
|
|
translate(off),
|
|
translate(cp) *
|
|
mirror(nv) *
|
|
translate(-cp) *
|
|
translate(off)
|
|
]
|
|
)
|
|
p==_NO_ARG? mats : [for (m = mats) apply(m, p)];
|
|
|
|
|
|
|
|
////////////////////
|
|
// Section: Distributing children individually along a line
|
|
///////////////////
|
|
|
|
// Module: xdistribute()
|
|
//
|
|
// Description:
|
|
// Spreads out the children individually along the X axis.
|
|
// Every child is placed at a different position, in order.
|
|
// This is useful for laying out groups of disparate objects
|
|
// where you only really care about the spacing between them.
|
|
//
|
|
// Usage:
|
|
// xdistribute(spacing, [sizes]) CHILDREN;
|
|
// xdistribute(l=, [sizes=]) CHILDREN;
|
|
//
|
|
// Arguments:
|
|
// spacing = spacing between each child. (Default: 10.0)
|
|
// sizes = Array containing how much space each child will need.
|
|
// l = Length to distribute copies along.
|
|
//
|
|
// Side Effects:
|
|
// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
|
|
// `$idx` is set to the index number of each child being copied.
|
|
//
|
|
// Example:
|
|
// xdistribute(sizes=[100, 10, 30], spacing=40) {
|
|
// sphere(r=50);
|
|
// cube([10,20,30], center=true);
|
|
// cylinder(d=30, h=50, center=true);
|
|
// }
|
|
module xdistribute(spacing=10, sizes=undef, l=undef)
|
|
{
|
|
req_children($children);
|
|
dir = RIGHT;
|
|
gaps = ($children < 2)? [0] :
|
|
!is_undef(sizes)? [for (i=[0:1:$children-2]) sizes[i]/2 + sizes[i+1]/2] :
|
|
[for (i=[0:1:$children-2]) 0];
|
|
spc = !is_undef(l)? ((l - sum(gaps)) / ($children-1)) : default(spacing, 10);
|
|
gaps2 = [for (gap = gaps) gap+spc];
|
|
spos = dir * -sum(gaps2)/2;
|
|
spacings = cumsum([0, each gaps2]);
|
|
for (i=[0:1:$children-1]) {
|
|
$pos = spos + spacings[i] * dir;
|
|
$idx = i;
|
|
translate($pos) children(i);
|
|
}
|
|
}
|
|
|
|
|
|
// Module: ydistribute()
|
|
//
|
|
// Description:
|
|
// Spreads out the children individually along the Y axis.
|
|
// Every child is placed at a different position, in order.
|
|
// This is useful for laying out groups of disparate objects
|
|
// where you only really care about the spacing between them.
|
|
//
|
|
// Usage:
|
|
// ydistribute(spacing, [sizes]) CHILDREN;
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// ydistribute(l=, [sizes=]) CHILDREN;
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//
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// Arguments:
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// spacing = spacing between each child. (Default: 10.0)
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// sizes = Array containing how much space each child will need.
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// l = Length to distribute copies along.
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//
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// Side Effects:
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// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
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// `$idx` is set to the index number of each child being copied.
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//
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// Example:
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// ydistribute(sizes=[30, 20, 100], spacing=40) {
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// cylinder(d=30, h=50, center=true);
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// cube([10,20,30], center=true);
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// sphere(r=50);
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// }
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module ydistribute(spacing=10, sizes=undef, l=undef)
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{
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req_children($children);
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dir = BACK;
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gaps = ($children < 2)? [0] :
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!is_undef(sizes)? [for (i=[0:1:$children-2]) sizes[i]/2 + sizes[i+1]/2] :
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[for (i=[0:1:$children-2]) 0];
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spc = !is_undef(l)? ((l - sum(gaps)) / ($children-1)) : default(spacing, 10);
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gaps2 = [for (gap = gaps) gap+spc];
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spos = dir * -sum(gaps2)/2;
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spacings = cumsum([0, each gaps2]);
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for (i=[0:1:$children-1]) {
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$pos = spos + spacings[i] * dir;
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$idx = i;
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translate($pos) children(i);
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}
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}
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// Module: zdistribute()
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//
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// Description:
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// Spreads out each individual child along the Z axis.
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// Every child is placed at a different position, in order.
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// This is useful for laying out groups of disparate objects
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// where you only really care about the spacing between them.
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//
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// Usage:
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// zdistribute(spacing, [sizes]) CHILDREN;
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// zdistribute(l=, [sizes=]) CHILDREN;
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//
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// Arguments:
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// spacing = spacing between each child. (Default: 10.0)
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// sizes = Array containing how much space each child will need.
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// l = Length to distribute copies along.
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//
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// Side Effects:
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// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
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// `$idx` is set to the index number of each child being copied.
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//
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// Example:
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// zdistribute(sizes=[30, 20, 100], spacing=40) {
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// cylinder(d=30, h=50, center=true);
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// cube([10,20,30], center=true);
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// sphere(r=50);
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// }
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module zdistribute(spacing=10, sizes=undef, l=undef)
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{
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req_children($children);
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dir = UP;
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gaps = ($children < 2)? [0] :
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!is_undef(sizes)? [for (i=[0:1:$children-2]) sizes[i]/2 + sizes[i+1]/2] :
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[for (i=[0:1:$children-2]) 0];
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spc = !is_undef(l)? ((l - sum(gaps)) / ($children-1)) : default(spacing, 10);
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gaps2 = [for (gap = gaps) gap+spc];
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spos = dir * -sum(gaps2)/2;
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spacings = cumsum([0, each gaps2]);
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for (i=[0:1:$children-1]) {
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$pos = spos + spacings[i] * dir;
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$idx = i;
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translate($pos) children(i);
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}
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}
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// Module: distribute()
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//
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// Description:
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// Spreads out the children individually along the direction `dir`.
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// Every child is placed at a different position, in order.
|
|
// This is useful for laying out groups of disparate objects
|
|
// where you only really care about the spacing between them.
|
|
//
|
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// Usage:
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|
// distribute(spacing, sizes, dir) CHILDREN;
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// distribute(l=, [sizes=], [dir=]) CHILDREN;
|
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//
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// Arguments:
|
|
// spacing = Spacing to add between each child. (Default: 10.0)
|
|
// sizes = Array containing how much space each child will need.
|
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// dir = Vector direction to distribute copies along. Default: RIGHT
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// l = Length to distribute copies along.
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//
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// Side Effects:
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|
// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
|
|
// `$idx` is set to the index number of each child being copied.
|
|
//
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// Example:
|
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// distribute(sizes=[100, 30, 50], dir=UP) {
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// sphere(r=50);
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// cube([10,20,30], center=true);
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// cylinder(d=30, h=50, center=true);
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// }
|
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module distribute(spacing=undef, sizes=undef, dir=RIGHT, l=undef)
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{
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req_children($children);
|
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gaps = ($children < 2)? [0] :
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|
!is_undef(sizes)? [for (i=[0:1:$children-2]) sizes[i]/2 + sizes[i+1]/2] :
|
|
[for (i=[0:1:$children-2]) 0];
|
|
spc = !is_undef(l)? ((l - sum(gaps)) / ($children-1)) : default(spacing, 10);
|
|
gaps2 = [for (gap = gaps) gap+spc];
|
|
spos = dir * -sum(gaps2)/2;
|
|
spacings = cumsum([0, each gaps2]);
|
|
for (i=[0:1:$children-1]) {
|
|
$pos = spos + spacings[i] * dir;
|
|
$idx = i;
|
|
translate($pos) children(i);
|
|
}
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}
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// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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