Jim Charter wrote:
> Can someone explain what the iso_rcsg.inc functions do?  I am not sure 
> what "rounded" means.

The macros in iso_rcsg.inc generate distance functions for the shapes 
they represent while the normal macros in iso_csg.inc just ensure the 
function is zero at the shape surface.

Note there are a lot of shapes that have a distance function macro in 
iso_csg.inc (like sphere, torus, triangle) so they don't need a separate 
one in iso_rcsg.inc.

Christoph

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