crossbar-computer-led-mount: cross sections done?

[reprap-play.git] / crossbar-computer-led-mount.scad

diff --git a/crossbar-computer-led-mount.scad b/crossbar-computer-led-mount.scad
index 6b2117aa6ce2acf5758357795ab741f5dd11da0c..b86b4b974801adc53433fe226062f7b7be0c0b1e 100644 (file)
--- a/crossbar-computer-led-mount.scad
+++ b/crossbar-computer-led-mount.scad
@@ -3,6 +3,22 @@
 led_dia = 5 + 0.6;
 led_depth = 5;
 
+led_tip_z = 70;
+led_angle = -60;
+
+vert_space_inside = 8;
+backfront_space_inside = 12;
+
+backfront_mate_size = 25;
+tower_frontheight = 20;
+
+// tuning
+
+tower_over_angle = 45;
+tower_wall_thick = 1.6;
+tower_base_height = 10;
+tower_forehead_angle = 30;
+
 //--- tests ---
 
 test_width = 24;
@@ -29,3 +45,75 @@ module Tests(){ ////toplevel
 
 //--- real thing ---
 
+tower_overhang = led_dia * 2.5;
+
+tower_over_max_y = tower_overhang * sin(tower_over_angle);
+tower_over_max_z = tower_frontheight + tower_overhang * cos(tower_over_angle);
+tower_total_max_z = tower_over_max_z + vert_space_inside + led_depth;
+tower_rearwall_y = -(backfront_space_inside + tower_wall_thick);
+
+backfront_mate_extra = (backfront_mate_size - (-tower_rearwall_y));
+
+module TowerWallCrossSection(){
+  // generates a 2D shape - a polygon
+  // x is what is going to be -y
+  // y is what is going to be z
+  polygon([[0,                  0],
+          [0,                  tower_frontheight],
+          [-tower_over_max_y,  tower_over_max_z],
+          [-tower_over_max_y
+           + tan(tower_forehead_angle) * (vert_space_inside + led_depth),
+           tower_total_max_z],
+          [-tower_rearwall_y,  tower_total_max_z],
+          [-tower_rearwall_y,  0],
+          [-tower_rearwall_y, -tower_base_height],
+          [-backfront_mate_extra, -tower_base_height]]);
+}
+
+module TowerWallSomeEdge(front){
+  minkowski(){
+    difference(){
+      TowerWallCrossSection();
+      translate([front ? 0.10 : -0.10, 0])
+       TowerWallCrossSection();
+    }
+    circle(r=tower_wall_thick, $fn=8);
+  }
+}
+
+module TowerBulkCrossSection(){
+  intersection(){
+    TowerWallCrossSection();
+    union(){
+      translate([-tower_over_max_y/2,
+                tower_frontheight + tower_overhang*sin(tower_over_angle)/2])
+       circle(r = led_depth);
+      TowerWallSomeEdge(true);
+      translate([-50, -50])
+       square([100, 50]);
+    }
+  }
+}
+
+module TowerRearWallCrossSection(){
+  intersection(){
+    TowerWallCrossSection();
+    union(){
+      intersection(){
+       translate([0,-10]) square([100, 10+tower_frontheight]);
+       TowerWallSomeEdge(false);
+      }
+      TowerBulkCrossSection();
+    }
+  }
+}
+
+module TowerDemo(){
+  %TowerWallCrossSection();
+  //TowerBulkCrossSection();
+  TowerRearWallCrossSection();
+}
+
+TowerDemo();
+//TowerWallSomeEdge(false);
+//TowerWallFrontEdge();