sprinkler-spike-receptacle.scad

   1 // -*- C -*-
   2
   3 main_height = 95;
   4
   5 spike_top_width = 21.04;
   6
   7 spike_botpos_height = 9.5;
   8 spike_botpos_width = 11.68;
   9
  10 topwall_width = 1.5;
  11
  12 // calculated
  13
  14 main_width = spike_top_width + topwall_width*2;
  15
  16 module NegativePlan(){
  17   x4z =
  18     (spike_top_width - spike_botpos_width) /
  19     (main_height - spike_botpos_height);
  20
  21   x0 = (spike_botpos_width - x4z * spike_botpos_height)/2;
  22   x1 =  spike_top_width/2;
  23   z1 = main_height;
  24
  25   polygon([[ x0, -5],
  26            [ x0, 0],
  27            [ x1, z1],
  28            [ x1, z1+5],
  29            [-x1, z1+5],
  30            [-x1, z1],
  31            [-x0, 0],
  32            [-x0, -5]]);
  33 }
  34
  35 module PositivePlan(){
  36   w = main_width;
  37   translate([ -w/2, 0 ])
  38     square([ w, main_height ]);
  39 }
  40
  41 module PlanTest(){
  42   linear_extrude(height=2.0){
  43     difference(){
  44       PositivePlan();
  45       NegativePlan();
  46     }
  47     difference(){
  48       circle(r = spike_botpos_width/2 + 5);
  49       circle(r = spike_botpos_width/2);
  50       translate([-50, 0]) square([100,50]);
  51     }
  52   }
  53   linear_extrude(height=4.0){
  54     difference(){
  55       translate([ -main_width/2, 0 ]) square([ main_width, 2 ]);
  56       NegativePlan();
  57     }
  58   }
  59 }
  60
  61 PlanTest();