crossbar-computer-led-mount.scad

   1 // -*- C -*-
   2
   3 led_dia = 5 + 0.6;
   4 led_depth = 3.5;
   5
   6 led_tip_z = 70;
   7 led_angle = -60;
   8
   9 vert_space_inside = 8;
  10 backfront_space_inside = 12;
  11
  12 backfront_mate_size = 20;
  13
  14 // tuning
  15
  16 tower_over_angle = 45;
  17 tower_wall_thick = 1.6;
  18 tower_base_height = 5;
  19
  20 //--- tests ---
  21
  22 test_width = 24;
  23 test_height = 24;
  24
  25 test_thicks = [9,14,21];
  26
  27 module Tests(){ ////toplevel
  28   for (thicki=[0:len(test_thicks)-1]) {
  29     translate([thicki*test_width-0.5, 0, 0]) {
  30       difference(){
  31         cube([test_width,
  32               test_thicks[thicki] + led_depth,
  33               test_height]);
  34         translate([test_width/2, -1, test_height/2])
  35           rotate([-90,0,0])
  36           cylinder(r=led_dia/2, h=led_depth+1, $fn=30);
  37       }
  38     }
  39   }
  40 }
  41
  42 //Tests();
  43
  44 //--- real thing ---
  45
  46 tower_frontheight = 30; //fixme
  47 tower_overhang = led_dia * 4;
  48
  49 tower_over_max_y = tower_overhang * sin(tower_over_angle);
  50 tower_over_max_z = tower_frontheight + tower_overhang * cos(tower_over_angle);
  51 tower_total_max_z = tower_over_max_z + vert_space_inside + led_depth;
  52 tower_rearwall_y = -(backfront_space_inside + tower_wall_thick);
  53
  54 backfront_mate_extra = (backfront_mate_size - (-tower_rearwall_y))/2;
  55
  56 module TowerWallCrossSection(){
  57   // generates a 2D shape - a polygon
  58   // x is what is going to be -y
  59   // y is what is going to be z
  60   polygon([[0,                  0],
  61            [0,                  tower_frontheight],
  62            [-tower_over_max_y,  tower_over_max_z],
  63            [-tower_over_max_y,  tower_total_max_z],
  64            [-tower_rearwall_y,  tower_total_max_z],
  65            [-tower_rearwall_y,  0],
  66            [-tower_rearwall_y+backfront_mate_extra, -tower_base_height],
  67            [                 -backfront_mate_extra, -tower_base_height]]);
  68 }
  69
  70 TowerWallCrossSection();