add halfspace

2023-01-12 00:28:36 -05:00
parent 0b05249d7b
commit 933b2d9d73
4 changed files with 24 additions and 6 deletions
--- a/helper/math.scad
+++ b/helper/math.scad
@ -10,3 +10,12 @@ function mirror4XY(midpoint, offsetX, offsetY)  =
        [midpoint[0]-offsetX, midpoint[1]+offsetY, midpoint[2]],
        [midpoint[0]-offsetX, midpoint[1]-offsetY, midpoint[2]],
        [midpoint[0]+offsetX, midpoint[1]-offsetY, midpoint[2]]];
+
+
+module align(a,b) {
+    rot_axis = cross(a,b);
+    angle = acos(a*b/ (norm(a)*norm(b)));
+
+    rotate(v=rot_axis, a=angle)
+        children(0);
+}