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when triangles is undef, delaunary trianglation

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Justin Lin 2021-06-26 20:52:32 +08:00
parent 9cc90e482a
commit 9595e2cb34
1 changed files with 18 additions and 4 deletions
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22
src/surface/sf_thicken_tri.scad
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@ -3,10 +3,13 @@ use <../util/find_index.scad>;
use <../util/slice.scad>;
use <../util/sum.scad>;
use <../surface/sf_solidify_tri.scad>;
use <../triangle/tri_delaunay.scad>;
module sf_thicken_tri(points, thickness, triangles = undef, direction = "BOTH") {
// triangles : counter-clockwise
tris = [for(tri = triangles) [tri[2], tri[1], tri[0]]];
real_triangles = is_undef(triangles) ? tri_delaunay([for(p = points) [p[0], p[1]]]) : triangles;
tris = [for(tri = real_triangles) [tri[2], tri[1], tri[0]]];
ascending = function(e1, e2) e1 - e2;
@ -79,17 +82,17 @@ module sf_thicken_tri(points, thickness, triangles = undef, direction = "BOTH")
half_thickness = thickness / 2;
pts1 = points + vertex_normals * half_thickness;
pts2 = points - vertex_normals * half_thickness;
sf_solidify_tri(pts1, pts2, triangles);
sf_solidify_tri(pts1, pts2, real_triangles);
}
else if(direction == "FORWARD") {
pts1 = points + vertex_normals * thickness;
pts2 = points;
sf_solidify_tri(pts1, pts2, triangles);
sf_solidify_tri(pts1, pts2, real_triangles);
}
else {
pts1 = points;
pts2 = points - vertex_normals * thickness;
sf_solidify_tri(pts1, pts2, triangles);
sf_solidify_tri(pts1, pts2, real_triangles);
}
}
}
@ -119,7 +122,18 @@ thickness = 5;
sf_thicken_tri(pts, thickness, indices);
*/
/*
use <triangle/tri_delaunay.scad>;
use <triangle/tri_delaunay_indices.scad>;
use <triangle/tri_delaunay_shapes.scad>;
use <surface/sf_thicken_tri.scad>;
points = [for(i = [0:50]) rands(-200, 200, 3)];
pts = [for(p = points) [p[0], p[1], rands(100, 120, 1)[0]]];
thickness = 5;
sf_thicken_tri(pts, thickness);
*/