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// Example of a CSG (Constructive Solid Geometry) system
// Should be used with a PovRay template.
//
// See:
// http://www.flickr.com/photos/syntopia/3644799200/
// for more information.
set maxdepth 17
set recursion depth
template::intersection-begin
{ y 0.5 s 5 1 1 color white } box
template::union-begin
r1
template::union-end
template::intersection-end
rule r1 md 17 {
template::difference-begin
sphere
{ s 0.99 x -0.1 } sphere
template::difference-end
1 * { s 0.95 x -0.1 } 1 * { s 0.95 x -0.1 } r1
}
rule r1 md 17 {
template::difference-begin
sphere
{ s 0.99 x -0.1 } sphere
template::difference-end
1 * { s 0.95 x -0.1 } 1 * { s 0.95 x -0.1 } r1
}
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