Add polyhedron generation from throw and shape

2022-01-07 22:19:11 -08:00
parent 07f774767a
commit b08ea22c8e
1 changed files with 34 additions and 5 deletions
@@ -1,10 +1,23 @@
+$fn = 32;
 gate_height = 50;

-sq_poly = [
-  [sqrt(2), sqrt(2)],
-  [-sqrt(2), sqrt(2)],
-  [-sqrt(2), -sqrt(2)],
-  [sqrt(2), -sqrt(2)]
+
+sq_poly = let(corner = 1 / sqrt(2)) [
+  [corner, corner],
+  [-corner, corner],
+  [-corner, -corner],
+  [corner, -corner]
+];
+
+oct_poly = let(corner = 1 / sqrt(2))[
+  [1,0],
+  [corner, corner],
+  [0,1],
+  [-corner, corner],
+  [-1,0],
+  [-corner, -corner],
+  [0,-1],
+  [corner, -corner],
 ];

 function scale_xy_z(m, xy, z) = [ for (i = [0 : len(m) - 1]) [m[i].x * xy, m[i].y * xy, z]];
@@ -13,6 +26,11 @@ function throw_end(throw) = gate_height * tan(throw);

 function throw_points(shape, throw) = concat([[0,0,0]],scale_xy_z(shape, throw_end(throw), gate_height));

+function throw_faces(points) = [
+  [each [1:len(points) - 1]],
+  for(i =[1:len(points) - 1]) let (next = i < len(points) - 1 ? i + 1 : 1) [i, next, 0] 
+];
+
 module shape_gate (shape, throw, shaft_r, sharpness = 1) {
  
 }
@@ -20,3 +38,14 @@ module shape_gate (shape, throw, shaft_r, sharpness = 1) {
 //echo(concat([[0,0,0]],scale_xy_z(sq_poly, 3, 3)));

 echo(throw_points(sq_poly, 15));
+echo(throw_faces(throw_points(sq_poly, 15)));
+
+points = throw_points(oct_poly, 15);
+faces = throw_faces(points);
+
+minkowski() {
+hull(){
+  polyhedron(points, faces);
+}
+cylinder(1,3);
+}