Hello Gabriel,
Gabriel Zachman wrote:
> I've got a large number of spheres, half of them blue, the other half
> red.
>
> I would like to render the intersection of all blue spheres with all
> red spheres.
>
> There is the well-known csg.c demo by Tom McReynolds, which seems to
> be fairly easy.
>
> Question now is: how would I do the same effect (the and() function in
> csg.c) with OpenSG 1.8?
I've only glanced over the example code you linked in the follow up
message, but it seems to use multiple passes with different
stencil/depth buffer settings to achieve the desired effect [1].
Have you looked at Tutorials/33ClipPlaneCaps.cpp? In it Johannes Brunen
shows how to make geometry that is capped by OpenGL clipping planes
appear solid by filling parts of the clipping plane.
Cheers,
Carsten
[1] is there some text available that describes the algorithms
steps/ideas in addition to the comments in the source?
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