added one more example STL file with common 3d objects (including OpenSCAD source file)

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@447 bbaffbd6-741e-11dd-a85d-61de82d9cad9

Samples/STL/SampleScene2.scad

+// example scene for pycam
+
+module scene() {
+    sphere(r=15, center=true);
+    translate(v=[0,80,5]) cylinder(h = 10, r1 = 20, r2 = 10, center = true);
+    translate(v=[0,40,15]) {
+      intersection() {
+        translate([0,0,-15]) rotate([60,0,90]) cube([30, 20, 20], center=true);
+        cylinder(h = 30, r = 10, center = true);
+      }
+    }
+    translate([0,130,-5]) {
+      intersection() {
+        sphere(20, center=true);
+        rotate([30,60,0]) cube(30, center=true);
+      }
+    }
+}
+
+// remove the parts of the objects below the zero plane
+difference() {
+  scale([0.5, 0.5, 0.3]) scene();
+  translate([0,0,-20]) cube([200,200,40], center=true);
+}
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