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Optimized bezier_patch()

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Revar Desmera
2020-03-20 14:27:11 -07:00
parent f65228f0af
commit 9f3cf44f91
3 changed files with 26 additions and 21 deletions
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26
examples/bezier_patches.scad
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@@ -54,11 +54,11 @@ function CR_edge(size, spin=0, orient=UP, trans=[0,0,0]) =
);
module CR_cube(size=[100,100,100], r=10, splinesteps=8, cheat=false, debug=false)
module CR_cube(size=[100,100,100], r=10, splinesteps=8, debug=false)
{
s = size-2*[r,r,r];
h = size/2;
corners = [
corners = bezier_surface([
CR_corner([r,r,r], spin=0, orient=UP, trans=[-size.x/2, -size.y/2, -size.z/2]),
CR_corner([r,r,r], spin=90, orient=UP, trans=[ size.x/2, -size.y/2, -size.z/2]),
CR_corner([r,r,r], spin=180, orient=UP, trans=[ size.x/2, size.y/2, -size.z/2]),
@@ -68,8 +68,8 @@ module CR_cube(size=[100,100,100], r=10, splinesteps=8, cheat=false, debug=false
CR_corner([r,r,r], spin=90, orient=DOWN, trans=[-size.x/2, -size.y/2, size.z/2]),
CR_corner([r,r,r], spin=180, orient=DOWN, trans=[-size.x/2, size.y/2, size.z/2]),
CR_corner([r,r,r], spin=270, orient=DOWN, trans=[ size.x/2, size.y/2, size.z/2]),
];
edges = [
], splinesteps=splinesteps);
edges = bezier_surface([
CR_edge([r, r, s.x], spin=0, orient=RIGHT, trans=[ 0, -h.y, h.z]),
CR_edge([r, r, s.x], spin=90, orient=RIGHT, trans=[ 0, -h.y, -h.z]),
CR_edge([r, r, s.x], spin=180, orient=RIGHT, trans=[ 0, h.y, -h.z]),
@@ -84,8 +84,8 @@ module CR_cube(size=[100,100,100], r=10, splinesteps=8, cheat=false, debug=false
CR_edge([r, r, s.z], spin=90, orient=UP, trans=[ h.x, -h.y, 0]),
CR_edge([r, r, s.z], spin=180, orient=UP, trans=[ h.x, h.y, 0]),
CR_edge([r, r, s.z], spin=270, orient=UP, trans=[-h.x, h.y, 0])
];
faces = [
], splinesteps=[1,splinesteps]);
faces = bezier_surface([
// Yes, these are degree 1 bezier patches. That means just the four corner points.
// Since these are flat, it doesn't matter what degree they are, and this will reduce calculation overhead.
bezier_patch_flat([s.y, s.z], N=1, orient=RIGHT, trans=[ h.x, 0, 0]),
@@ -96,21 +96,17 @@ module CR_cube(size=[100,100,100], r=10, splinesteps=8, cheat=false, debug=false
bezier_patch_flat([s.x, s.y], N=1, orient=UP, trans=[ 0, 0, h.z]),
bezier_patch_flat([s.x, s.y], N=1, orient=DOWN, trans=[ 0, 0, -h.z])
];
], splinesteps=1);
if (cheat) {
hull() bezier_polyhedron(patches=corners, splinesteps=splinesteps);
if (debug) {
vnf_validate([edges, faces, corners], convexity=4);
} else {
if (debug) {
trace_bezier_patches(patches=concat(edges, faces, corners), showcps=true, splinesteps=splinesteps);
} else {
bezier_polyhedron(patches=concat(edges, faces, corners), splinesteps=splinesteps);
}
vnf_polyhedron([edges, faces, corners], convexity=4);
}
}
CR_cube(size=[100,100,100], r=20, splinesteps=16, cheat=false, debug=false);
CR_cube(size=[100,100,100], r=20, splinesteps=16, debug=false);
cube(1);