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Merge pull request #1513 from adrianVmariano/master

Browse source 
ghosting, etc
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Revar Desmera 2024-11-29 00:17:58 -08:00 committed by GitHub
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5 changed files with 95 additions and 50 deletions
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91
attachments.scad
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@ -39,7 +39,9 @@ $edge_length = undef;
$tags_shown = "ALL";
$tags_hidden = [];
$ghost_this=false;
$ghost=false;
$ghosting=false; // Ghosting is in effect, so don't apply it again
_ANCHOR_TYPES = ["intersect","hull"];
@ -3104,31 +3106,32 @@ module attachable(
$attach_alignment=undef;
if (expose_tags || _is_shown()){
if (!keep_color)
_color($color) children(0);
_color($color)
if (($ghost || $ghost_this) && !$ghosting)
%union(){
$ghosting=true;
children(0);
}
else children(0);
else {
$save_color=undef; // Force color_this() color in effect to persist for the entire object
children(0);
if (($ghost || $ghost_this) && !$ghosting)
%union(){
$ghosting=true;
children(0);
}
else children(0);
}
}
if (is_def($save_tag) && is_def($save_color)){
$tag=$save_tag;
$save_tag=undef;
$color=$save_color; // Revert to the color before color_this() call
$save_color=undef;
children(1);
}
else if (is_def($save_color)) {
$color=$save_color; // Revert to the color before color_this() call
$save_color=undef;
children(1);
}
else if (is_def($save_tag)) {
$tag=$save_tag;
$save_tag=undef;
children(1);
}
else children(1);
}
let(
$ghost_this=false,
$tag=default($save_tag,$tag),
$save_tag=undef,
$color=default($save_color,$color),
$save_color=undef
)
children(1);
}
}
// Function: reorient()
@ -3726,25 +3729,24 @@ function _attach_transform(anchor, spin, orient, geom, p) =
spin=default(spin,0),
orient=default(orient,UP),
two_d = _attach_geom_2d(geom),
m = ($attach_to != undef) ? // $attach_to is the attachment point on this object
m = is_def($attach_to) ? // $attach_to is the attachment point on this object
( // which will attach to the parent
let(
anch = _find_anchor($attach_to, geom),
// if $anchor_override is set it defines the object position anchor (but note not direction or spin).
// Otherwise we use the provided anchor for the object.
pos = is_undef($anchor_override) ? anch[1]
: _find_anchor(_make_anchor_legal($anchor_override,geom),geom)[1]
)
two_d?
assert(is_num(spin))
affine3d_zrot(spin)
* rot(to=FWD, from=point3d(anch[2]))
* affine3d_translate(point3d(-pos))
:
affine3d_yrot(180)
* affine3d_zrot(-anch[3]-spin)
* rot(from=anch[2],to=UP)
* affine3d_translate(point3d(-pos))
let(
anch = _find_anchor($attach_to, geom),
// if $anchor_override is set it defines the object position anchor (but note not direction or spin).
// Otherwise we use the provided anchor for the object.
pos = is_undef($anchor_override) ? anch[1]
: _find_anchor(_make_anchor_legal($anchor_override,geom),geom)[1]
)
two_d?
affine3d_zrot(spin)
* rot(to=FWD, from=point3d(anch[2]))
* affine3d_translate(point3d(-pos))
:
affine3d_yrot(180)
* affine3d_zrot(-anch[3]-spin)
* rot(from=anch[2],to=UP)
* affine3d_translate(point3d(-pos))
)
:
let(
@ -3753,17 +3755,14 @@ function _attach_transform(anchor, spin, orient, geom, p) =
: _make_anchor_legal(rot(spin, from=UP,to=orient,reverse=true,p=$attach_alignment),geom),
pos = _find_anchor(anchor, geom)[1]
)
two_d?
assert(is_num(spin))
affine3d_zrot(spin) * affine3d_translate(point3d(-pos))
two_d? affine3d_zrot(spin) * affine3d_translate(point3d(-pos))
:
let(
axis = vector_axis(UP,orient), // Returns BACK if orient is UP
ang = vector_angle(UP,orient)
)
affine3d_rot_by_axis(axis,ang)
* ( is_num(spin)? affine3d_zrot(spin)
: affine3d_zrot(spin.z) * affine3d_yrot(spin.y) * affine3d_xrot(spin.x))
* affine3d_zrot(spin)
* affine3d_translate(point3d(-pos))
)
is_undef(p)? m
@ -3926,7 +3925,7 @@ function _find_anchor(anchor, geom)=
: oang // face anchors point UP/BACK
) [anchor, final_pos, final_dir, default(override[2],spin),
if (is_def(edgeang)) [["edge_angle",edgeang],["edge_length",edgelen], ["vec", endvecs]]]
) : type == "conoid"? ( //r1, r2, l, shift
) : type == "conoid"? ( //r1, r2, l, shift, axis
let(
rr1=geom[1],
rr2=geom[2],

44
color.scad
View file

@ -161,6 +161,50 @@ module color_overlaps(color="red") {
%children();
}
// Module: ghost()
// Synopsis: Sets transparency for attachable children and their descendents.
// SynTags: Trans
// Topics: Attachments
// See Also: ghost_this(), recolor(), color_this()
// Usage:
// ghost([ghost]) CHILDREN;
// Description:
// Sets the transparency for the attachable children and their descendents until another {{ghost()}} or {{ghost_this()}}.
// By default, turns transparency on. Give the `false` parameter to disable transparency.
// Do not mix this with user supplied `%` operators anywhere in the geometry tree.
// Arguments:
// ghost = If true set the descendents to be transparent; if false, disable transparency. Default: true
// Example(3D):
// ghost() cuboid(10)
// ghost(false) cuboid(5);
function ghost(ghost) = no_function("ghost");
module ghost(ghost=true)
{
$ghost=ghost;
children();
}
// Module: ghost_this()
// Synopsis: Makes the children at a single level transparent.
// SynTags: Trans
// Topics: Attachments
// See Also: ghost(), recolor(), color_this()
// Usage:
// ghost_this() CHILDREN;
// Description:
// Makes the children transparent for one level, reverting to the previous transparency state for further descendents.
// This works only with attachables and you cannot give the `%` operator anywhere in the geometry tree.
// Example(3D):
// ghost_this() cuboid(10)
// cuboid(5);
function ghost_this() = no_function("ghost_this");
module ghost_this()
{
$ghost_this=true;
children();
}
// Section: Colorspace Conversion

1
distributors.scad
View file

@ -654,6 +654,7 @@ module grid_copies(spacing, n, size, stagger=false, inside=undef, nonzero)
is_vector(n)? assert(len(n)==2) n :
size!=undef && spacing!=undef? v_floor(v_div(size,spacing))+[1,1] :
[2,2];
dummy2 = assert(is_int(n[0]) && is_int(n[1]), "The number of rows/columns must be an integer");
offset = v_mul(spacing, n-[1,1])/2;
poslist =

2
lists.scad
View file

@ -304,7 +304,7 @@ function last(list) =
// Example:
// hlist1 = list_head(["foo", "bar", "baz"]); // Returns: ["foo", "bar"]
// hlist2 = list_head(["foo", "bar", "baz"], -3); // Returns: ["foo"]
// hlist3 = list_head(["foo", "bar", "baz"], 2); // Returns: ["foo","bar"]
// hlist3 = list_head(["foo", "bar", "baz"], 1); // Returns: ["foo","bar"]
// hlist4 = list_head(["foo", "bar", "baz"], -5); // Returns: []
// hlist5 = list_head(["foo", "bar", "baz"], 5); // Returns: ["foo","bar","baz"]
function list_head(list, to=-2) =

5
tutorials/Transforms.md
View file

@ -219,8 +219,9 @@ color("blue",0.25) down(20) cube([40,40,0.1], center=true);
```
## Skewing
One transform that OpenSCAD does not perform natively is skewing.
## Skewing / Shearing
One transform that OpenSCAD does not perform natively is skewing, also
known as shearing.
BOSL2 provides the `skew()` command for that. You give it multipliers
for the skews you want to perform. The arguments used all start with `s`,
followed by the axis you want to skew along, followed by the axis that