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Code Issues Releases Wiki Activity

reverse is not required

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Justin Lin
2022-04-28 09:38:28 +08:00
parent 1ea86206bb
commit ae8e72a7f4
1 changed files with 3 additions and 4 deletions
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7
src/surface/sf_thickenT.scad
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@@ -13,7 +13,6 @@ use <../__comm__/_face_normal.scad>;
use <../util/sorted.scad>; use <../util/sorted.scad>;
use <../util/sum.scad>; use <../util/sum.scad>;
use <../util/contains.scad>; use <../util/contains.scad>;
use <../util/reverse.scad>;
use <../surface/sf_solidifyT.scad>; use <../surface/sf_solidifyT.scad>;
use <../triangle/tri_delaunay.scad>; use <../triangle/tri_delaunay.scad>;
@@ -28,7 +27,7 @@ module sf_thickenT(points, thickness, triangles = undef, direction = "BOTH", con
function _connected_tris(triangles, leng, leng_pts, cnt_tris, i = 0) = function _connected_tris(triangles, leng, leng_pts, cnt_tris, i = 0) =
i == leng ? cnt_tris : i == leng ? cnt_tris :
let( let(
tri = reverse(triangles[i]), // OpenSCAD requires clockwise tri = triangles[i],
n_cnt_tris = [ n_cnt_tris = [
for(k = [0:leng_pts - 1]) for(k = [0:leng_pts - 1])
contains(tri, k) ? [each cnt_tris[k], tri] : cnt_tris[k] contains(tri, k) ? [each cnt_tris[k], tri] : cnt_tris[k]
@@ -43,7 +42,7 @@ module sf_thickenT(points, thickness, triangles = undef, direction = "BOTH", con
dir_v = direction / norm(direction); dir_v = direction / norm(direction);
mid = sorted(points)[leng_pts / 2]; mid = sorted(points)[leng_pts / 2];
tri = cnn_tris[search([mid], points)[0]][0]; tri = cnn_tris[search([mid], points)[0]][0];
nv = _face_normal([for(i = [0:2]) points[tri[i]]]); nv = _face_normal([for(i = [2, 1, 0]) points[tri[i]]]); // OpenSCAD requires clockwise
off = dir_v * thickness; off = dir_v * thickness;
pts = [for(p = points) p + off]; pts = [for(p = points) p + off];
@@ -60,7 +59,7 @@ module sf_thickenT(points, thickness, triangles = undef, direction = "BOTH", con
let( let(
normals = [ normals = [
for(tri = cnn_tris[i]) for(tri = cnn_tris[i])
_face_normal([for(j = [0:2]) points[tri[j]]]) _face_normal([for(j = [2, 1, 0]) points[tri[j]]]) // OpenSCAD requires clockwise
] ]
) )
sum(normals) / len(normals) sum(normals) / len(normals)