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fix debug_vnf for case with collinear edges in a face

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Adrian Mariano 2024-01-28 14:26:40 -05:00
parent 0048336ad3
commit 75f7a75ac2
1 changed files with 18 additions and 22 deletions
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40
vnf.scad
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@ -906,6 +906,8 @@ function _vnf_sort_vertices(vnf, idx=[2,1,0]) =
) sorted_vnf; ) sorted_vnf;
// Function: vnf_slice() // Function: vnf_slice()
// Synopsis: Slice the faces of a VNF along an axis. // Synopsis: Slice the faces of a VNF along an axis.
// SynTags: VNF // SynTags: VNF
@ -1613,34 +1615,28 @@ module _show_faces(vertices, faces, size=1, filter) {
for (i = [0:1:len(faces)-1]) { for (i = [0:1:len(faces)-1]) {
face = faces[i]; face = faces[i];
if (face[0] < 0 || face[1] < 0 || face[2] < 0 || face[0] >= vlen || face[1] >= vlen || face[2] >= vlen) { if (face[0] < 0 || face[1] < 0 || face[2] < 0 || face[0] >= vlen || face[1] >= vlen || face[2] >= vlen) {
echo("BAD FACE: ", vlen=vlen, face=face); echo(str("INVALID FACE: indices of face ",i," are out of bounds [0,",vlen-1,"]: face=",face));
} else if (is_undef(filter) || any(face,filter)) { }
else if (is_undef(filter) || any(face,filter)) {
verts = select(vertices,face); verts = select(vertices,face);
c = mean(verts); normal = polygon_normal(verts);
v0 = verts[0]; if (is_undef(normal))
v1 = verts[1]; echo(str("DEGENERATE FACE: face ",i," has no normal vector, face=", face));
v2 = verts[2]; else {
dv0 = unit(v1 - v0); axis = vector_axis(normal, DOWN);
dv1 = unit(v2 - v0); ang = vector_angle(normal, DOWN);
nrm0 = cross(dv0, dv1); theta = atan2(normal[1], normal[0]);
nrm1 = UP; translate(mean(verts))
axis = vector_axis(nrm0, nrm1); rotate(a=(180-ang), v=axis)
ang = vector_angle(nrm0, nrm1); zrot(theta+90)
theta = atan2(nrm0[1], nrm0[0]); linear_extrude(height=size/10, center=true, convexity=10) {
translate(c) {
rotate(a=180-ang, v=axis) {
zrot(theta-90)
linear_extrude(height=size/10, center=true, convexity=10) {
union() {
text(text=str(i), size=size, halign="center"); text(text=str(i), size=size, halign="center");
text(text=str("_"), size=size, halign="center"); text(text=str("_"), size=size, halign="center");
} }
}
}
} }
} }
} }
} }
} }