quasar-triangle.scad

   1 infty = 200;
   2 eps = 0.01;
   3
   4 wall = 1.2;
   5 base_w = 4;
   6 thin_wall = 0.6;
   7 body_h = 4;
   8
   9 module tbar() {
  10         translate([-infty/4, 0, 0]) {
  11                 cube([infty/2, base_w, thin_wall]);
  12                 cube([infty/2, thin_wall, body_h]);
  13                 hull() {
  14                         translate([0, 0.7*base_w, 0])
  15                                 cube([infty/2, thin_wall, eps]);
  16                         translate([0, 0, body_h-eps])
  17                                 cube([infty/2, thin_wall, eps]);
  18                 }
  19         }
  20 }
  21
  22 module side_cube() {
  23         translate([-infty/2, 0, -eps])
  24                 cube([infty, infty, body_h+2*eps]);
  25 }
  26
  27 module triangle(w, h) {
  28         intersection() {
  29                 union() {
  30                         tbar();
  31                         translate([w/2, 0, 0])
  32                         rotate([0, 0, 90+atan(w/(2*h))])
  33                         translate([infty/5, 0, 0])
  34                                 tbar();
  35                         translate([-w/2, 0, 0])
  36                         rotate([0, 0, -90-atan(w/(2*h))])
  37                         translate([-infty/5, 0, 0])
  38                                 tbar();
  39                 }
  40                         side_cube();
  41                         translate([w/2, 0, 0])
  42                         rotate([0, 0, 90+atan(w/(2*h))])
  43                         translate([infty/5, 0, 0])
  44                                 side_cube();
  45                         translate([-w/2, 0, 0])
  46                         rotate([0, 0, -90-atan(w/(2*h))])
  47                         translate([-infty/5, 0, 0])
  48                                 side_cube();
  49         }
  50 }
  51
  52 triangle(50, 80);
  53 translate([50, 0, 0])
  54 triangle(40, 70);
  55 translate([85, 0, 0])
  56 triangle(15, 50);
  57 translate([105, 0, 0])
  58 triangle(15, 70);
  59