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https://github.com/BelfrySCAD/BOSL2.git
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Moved some paths functions to geometry.scad
This commit is contained in:
Revar Desmera
parent
f585b1fecd
commit
88314af127
3 changed files with 93 additions and 93 deletions
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@ -329,6 +329,98 @@ function in_front_of_plane(plane, point) =
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// Section: Paths and Polygons
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// Function: is_path()
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// Usage:
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// is_path(x);
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// Description:
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// Returns true if the given item looks like a path.
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function is_path(x) = is_list(x) && is_vector(x.x);
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// Function: is_closed_path()
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// Usage:
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// is_closed_path(path, [eps]);
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// Description:
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// Returns true if the first and last points in the given path are coincident.
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function is_closed_path(path, eps=1e-6) = approx(path[0], path[len(path)-1], eps=eps);
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// Function: close_path(path)
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// Usage:
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// close_path(path);
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// Description:
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// If a path's last point does not coincide with its first point, closes the path so it does.
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function close_path(path) = approx(path[0],path[len(path)-1])? path : concat(path,[path[0]]);
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// Function path_subselect()
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// Usage:
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// path_subselect(path,s1,u1,s2,u2):
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// Description:
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// Returns a portion of a path, from between the `u1` part of segment `s1`, to the `u2` part of
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// segment `s2`. Both `u1` and `u2` are values between 0.0 and 1.0, inclusive, where 0 is the start
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// of the segment, and 1 is the end. Both `s1` and `s2` are integers, where 0 is the first segment.
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// Arguments:
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// s1 = The number of the starting segment.
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// u1 = The proportion along the starting segment, between 0.0 and 1.0, inclusive.
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// s2 = The number of the ending segment.
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// u2 = The proportion along the ending segment, between 0.0 and 1.0, inclusive.
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function path_subselect(path,s1,u1,s2,u2) =
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let(
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l = len(path)-1,
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u1 = s1<0? 0 : s1>l? 1 : u1,
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u2 = s2<0? 0 : s2>l? 1 : u2,
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s1 = constrain(s1,0,l),
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s2 = constrain(s2,0,l),
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pathout = concat(
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(s1<l)? [lerp(path[s1],path[s1+1],u1)] : [],
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[for (i=[s1+1:1:s2]) path[i]],
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(s2<l)? [lerp(path[s2],path[s2+1],u2)] : []
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)
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) pathout;
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// Function: assemble_path_fragments()
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// Usage:
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// assemble_path_fragments(subpaths);
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// Description:
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// Given a list of incomplete paths, assembles them together into complete closed paths if it can.
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function assemble_path_fragments(subpaths,_finished=[]) =
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len(subpaths)<=1? concat(_finished, subpaths) :
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let(
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path = subpaths[0],
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matches = [
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for (i=[1:1:len(subpaths)-1], rev1=[0,1], rev2=[0,1]) let(
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idx1 = rev1? 0 : len(path)-1,
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idx2 = rev2? len(subpaths[i])-1 : 0
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) if (approx(path[idx1], subpaths[i][idx2])) [
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i, concat(
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rev1? reverse(path) : path,
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select(rev2? reverse(subpaths[i]) : subpaths[i], 1,-1)
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)
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]
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]
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) len(matches)==0? (
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assemble_path_fragments(
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select(subpaths,1,-1),
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concat(_finished, [path])
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)
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) : is_closed_path(matches[0][1])? (
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assemble_path_fragments(
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[for (i=[1:1:len(subpaths)-1]) if(i != matches[0][0]) subpaths[i]],
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concat(_finished, [matches[0][1]])
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)
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) : (
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assemble_path_fragments(
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concat(
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[matches[0][1]],
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[for (i = [1:1:len(subpaths)-1]) if(i != matches[0][0]) subpaths[i]]
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),
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_finished
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)
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);
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// Function: simplify_path()
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// Description:
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// Takes a path and removes unnecessary collinear points.
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92
paths.scad
92
paths.scad
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@ -14,30 +14,6 @@ include <BOSL2/triangulation.scad>
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// Section: Functions
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// Function: is_path()
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// Usage:
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// is_path(x);
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// Description:
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// Returns true if the given item looks like a path.
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function is_path(x) = is_list(x) && is_vector(x.x);
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// Function: is_closed_path()
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// Usage:
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// is_closed_path(path, [eps]);
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// Description:
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// Returns true if the first and last points in the given path are coincident.
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function is_closed_path(path, eps=1e-6) = approx(path[0], path[len(path)-1], eps=eps);
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// Function: close_path(path)
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// Usage:
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// close_path(path);
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// Description:
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// If a path's last point does not coincide with its first point, closes the path so it does.
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function close_path(path) = approx(path[0],path[len(path)-1])? path : concat(path,[path[0]]);
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// Function: simplify2d_path()
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// Description:
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// Takes a 2D polyline and removes unnecessary collinear points.
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@ -75,74 +51,6 @@ function path_length(path) =
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sum([for (i = [0:1:len(path)-2]) norm(path[i+1]-path[i])]);
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// Function path_subselect()
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// Usage:
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// path_subselect(path,s1,u1,s2,u2):
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// Description:
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// Returns a portion of a path, from between the `u1` part of segment `s1`, to the `u2` part of
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// segment `s2`. Both `u1` and `u2` are values between 0.0 and 1.0, inclusive, where 0 is the start
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// of the segment, and 1 is the end. Both `s1` and `s2` are integers, where 0 is the first segment.
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// Arguments:
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// s1 = The number of the starting segment.
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// u1 = The proportion along the starting segment, between 0.0 and 1.0, inclusive.
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// s2 = The number of the ending segment.
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// u2 = The proportion along the ending segment, between 0.0 and 1.0, inclusive.
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function path_subselect(path,s1,u1,s2,u2) =
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let(
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l = len(path)-1,
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u1 = s1<0? 0 : s1>l? 1 : u1,
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u2 = s2<0? 0 : s2>l? 1 : u2,
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s1 = constrain(s1,0,l),
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s2 = constrain(s2,0,l),
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pathout = concat(
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(s1<l)? [lerp(path[s1],path[s1+1],u1)] : [],
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[for (i=[s1+1:1:s2]) path[i]],
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(s2<l)? [lerp(path[s2],path[s2+1],u2)] : []
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)
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) pathout;
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// Function: assemble_path_fragments()
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// Usage:
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// assemble_path_fragments(subpaths);
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// Description:
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// Given a list of incomplete paths, assembles them together into complete closed paths if it can.
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function assemble_path_fragments(subpaths,_finished=[]) =
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len(subpaths)<=1? concat(_finished, subpaths) :
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let(
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path = subpaths[0],
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matches = [
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for (i=[1:1:len(subpaths)-1], rev1=[0,1], rev2=[0,1]) let(
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idx1 = rev1? 0 : len(path)-1,
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idx2 = rev2? len(subpaths[i])-1 : 0
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) if (approx(path[idx1], subpaths[i][idx2])) [
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i, concat(
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rev1? reverse(path) : path,
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select(rev2? reverse(subpaths[i]) : subpaths[i], 1,-1)
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)
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]
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]
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) len(matches)==0? (
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assemble_path_fragments(
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select(subpaths,1,-1),
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concat(_finished, [path])
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)
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) : is_closed_path(matches[0][1])? (
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assemble_path_fragments(
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[for (i=[1:1:len(subpaths)-1]) if(i != matches[0][0]) subpaths[i]],
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concat(_finished, [matches[0][1]])
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)
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) : (
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assemble_path_fragments(
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concat(
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[matches[0][1]],
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[for (i = [1:1:len(subpaths)-1]) if(i != matches[0][0]) subpaths[i]]
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),
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_finished
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)
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);
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// Function: path3d_spiral()
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// Description:
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// Returns a 3D spiral path.
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@ -14,7 +14,7 @@ done
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if [[ "$FILES" != "" ]]; then
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PREVIEW_LIBS="$FILES"
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else
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PREVIEW_LIBS="common errors attachments math arrays vectors affine coords geometry triangulation quaternions hull constants edges transforms primitives shapes masks shapes2d paths beziers roundcorners walls metric_screws threading involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra debug"
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PREVIEW_LIBS="common errors attachments math arrays vectors affine coords geometry triangulation quaternions strings structs hull constants edges transforms primitives shapes masks shapes2d paths beziers roundcorners walls metric_screws threading involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra debug"
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fi
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dir="$(basename $PWD)"
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