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fix vnf_vertex_array bug where zero area faces don't get removed

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This commit is contained in:
Adrian Mariano
2023-01-21 13:36:33 -05:00
parent c2ec3552c4
commit b0042882c9
2 changed files with 4 additions and 34 deletions
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31
skin.scad
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@@ -2585,7 +2585,7 @@ function associate_vertices(polygons, split, curpoly=0) =
// Another serious limitation is more subtle. In the 2D examples above, it is obvious how to connect the
// dots together. But in 3D example we need to triangulate the points on a grid, and this triangulation is not unique.
// The `style` argument lets you specify how the points are triangulated using the styles supported by {{vnf_vertex_array()}}.
// In the example below we have expanded the 2D example into 3D: [[0,0,0,0],[0,1,1,0],[0,1,1,0],[0,0,0,0]], and we show the
// In the example below we have expanded the 2D example into 3D: `[[0,0,0,0],[0,1,1,0],[0,1,1,0],[0,0,0,0]]`, and we show the
// 3D triangulations produced by the different styles:
// Figure(Big,NoAxes,VPR=[39.2,0,13.3],VPT=[3.76242,-5.50969,4.51854],VPD=32.0275):
// tex = [
@@ -3432,35 +3432,6 @@ function _textured_linear_sweep(
) reorient(anchor,spin,orient, vnf=final_vnf, extent=true, anchors=anchors, p=final_vnf);
module _textured_linear_sweep(
path, texture, tex_size=[5,5], h,
inset=false, rot=false, tex_scale=1,
twist, scale, shift, samples, caps=true,
style="min_edge", l,
height, length, counts,
anchor=CENTER, spin=0, orient=UP,
convexity=10
) {
h = first_defined([h, l, height, length, 1]);
vnf = _textured_linear_sweep(
path, texture, h=h, caps=caps,
tex_size=tex_size, counts=counts,
inset=inset, rot=rot, tex_scale=tex_scale,
twist=twist, scale=scale, shift=shift,
samples=samples, style=style,
anchor=CENTER, spin=0, orient=UP
);
cent = centroid(path);
anchors = [
named_anchor("centroid_top", point3d(cent, h/2), UP),
named_anchor("centroid", point3d(cent), UP),
named_anchor("centroid_bot", point3d(cent,-h/2), DOWN)
];
attachable(anchor,spin,orient, vnf=vnf, extent=true, anchors=anchors) {
vnf_polyhedron(vnf, convexity=convexity);
children();
}
}
function _find_vnf_tile_edge_path(vnf, val) =
let(

5
vnf.scad
View File

@@ -206,9 +206,8 @@ function vnf_vertex_array(
: [[i1,i3,i2],[i1,i4,i3]],
// remove degenerate faces
culled_faces= [for(face=faces)
if (norm(verts[face[0]]-verts[face[1]])>EPSILON &&
norm(verts[face[1]]-verts[face[2]])>EPSILON &&
norm(verts[face[2]]-verts[face[0]])>EPSILON)
if (norm(cross(verts[face[1]]-verts[face[0]],
verts[face[2]]-verts[face[0]]))>EPSILON)
face
],
rfaces = reverse? [for (face=culled_faces) reverse(face)] : culled_faces