openscad/dotSCAD
1
0
Fork 0
mirror of https://github.com/JustinSDK/dotSCAD.git synced 2025-01-17 22:28:16 +01:00
Code Issues Releases Wiki Activity

triangles : counter-clockwise

Browse Source
This commit is contained in:
Justin Lin 2021-06-26 20:43:53 +08:00
parent 74ed27cbc4
commit 43d25322f0
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/surface/sf_thicken_tri.scad
View File

@ -5,6 +5,9 @@ use <../util/sum.scad>;
use <../surface/sf_solidify_tri.scad>;
module sf_thicken_tri(points, triangles, thickness, direction = "BOTH") {
// triangles : counter-clockwise
tris = [for(tri = triangles) [tri[2], tri[1], tri[0]]];
ascending = function(e1, e2) e1 - e2;
function connected_tris(leng_pts, triangles) =
@ -40,7 +43,7 @@ module sf_thicken_tri(points, triangles, thickness, direction = "BOTH") {
let(v = cross(tri[2] - tri[0], tri[1] - tri[0])) v / norm(v);
leng_pts = len(points);
cnn_tris = connected_tris(leng_pts, triangles);
cnn_tris = connected_tris(leng_pts, tris);
if(is_list(direction)) {
dir_v = direction / norm(direction);
@ -103,7 +106,6 @@ points = [for(i = [0:50]) rands(-200, 200, 2)];
delaunay = tri_delaunay(points, ret = "DELAUNAY");
// count-clockwise (dotSCAD 2D polygon convention)
indices = tri_delaunay_indices(delaunay);
shapes = tri_delaunay_shapes(delaunay);
@ -112,12 +114,11 @@ for(tri = shapes) {
polygon(tri);
}
// triangles: clockwise (openscad 3D face convention)
triangles = [for(tri = indices) [tri[2], tri[1], tri[0]]];
pts = [for(p = points) [p[0], p[1], rands(100, 120, 1)[0]]];
thickness = 5;
sf_thicken_tri(pts, triangles, thickness);
sf_thicken_tri(pts, indices, thickness);
*/