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refactor

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Justin Lin
2022-04-29 08:52:52 +08:00
parent 4fe19bf552
commit 309098dfcc
1 changed files with 12 additions and 23 deletions
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35
src/surface/sf_thicken.scad
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@@ -13,24 +13,19 @@ use <../util/sum.scad>;
use <sf_solidify.scad>; use <sf_solidify.scad>;
module sf_thicken(points, thickness, direction = "BOTH", convexity = 1) { module sf_thicken(points, thickness, direction = "BOTH", convexity = 1) {
// clockwise
dirs1 = [[1, 0], [0, -1], [-1, 0], [0, 1]];
dirs2 = [[0, -1], [-1, 0], [0, 1], [1, 0]];
function vertex_normal(sf, xi, yi) = function vertex_normal(sf, xi, yi) =
let( let(
xy = [xi, yi],
// clockwise
vi = [
[1, 0] + xy,
[0, -1] + xy,
[-1, 0] + xy,
[0, 1] + xy
],
normals = [ normals = [
for(i = [0:3]) for(i = [0:3])
let( let(
vi1 = vi[i], v0 = sf[yi][xi],
vi2 = vi[(i + 1) % 4], dir1 = dirs1[i],
v0 = sf[xy[1]][xy[0]], dir2 = dirs2[i],
v1 = sf[vi1[1]][vi1[0]], v1 = sf[dir1.y + yi][dir1.x + xi],
v2 = sf[vi2[1]][vi2[0]] v2 = sf[dir2.y + yi][dir2.x + xi]
) )
if(!(is_undef(v0) || is_undef(v1) || is_undef(v2))) if(!(is_undef(v0) || is_undef(v1) || is_undef(v2)))
_face_normal([v0, v1, v2]) _face_normal([v0, v1, v2])
@@ -69,20 +64,14 @@ module sf_thicken(points, thickness, direction = "BOTH", convexity = 1) {
]; ];
if(direction == "BOTH") { if(direction == "BOTH") {
half_thickness = thickness / 2; off = vertex_normals * (thickness / 2);
surface_top = points + half_thickness * vertex_normals; sf_solidify(points + off, points - off, convexity = convexity);
surface_bottom = points - half_thickness * vertex_normals;
sf_solidify(surface_top, surface_bottom, convexity = convexity);
} }
else if(direction == "FORWARD") { else if(direction == "FORWARD") {
surface_top = points + thickness * vertex_normals; sf_solidify(points + thickness * vertex_normals, points, convexity = convexity);
surface_bottom = points;
sf_solidify(surface_top, surface_bottom, convexity = convexity);
} }
else { else {
surface_top = points; sf_solidify(points, points - thickness * vertex_normals, convexity = convexity);
surface_bottom = points - thickness * vertex_normals;
sf_solidify(surface_top, surface_bottom, convexity = convexity);
} }
} }
} }