--- /dev/null
+// -*- C -*-
+
+dy= 145;
+dx= 65;
+
+h1= 8;
+h2= 12;
+ratio = 0.8;
+
+module Plan(){
+ polygon([[ -dx/2, 0 ],
+ [ 0, dy/2 ],
+ [ dx/2, 0 ],
+ [ 0, -dy/2 ]]);
+}
+
+module Solid(){
+ rotate([0,0, -45]) {
+ hull(){
+ linear_extrude(height= h1) {
+ Plan();
+ }
+ linear_extrude(height= h2) {
+ scale(ratio) Plan();
+ }
+ }
+ }
+}
+
+Solid();