need Alg for constructive solid geometry

I asked this question before but the server crashed and lost it and the answers before I could respond...  anyway,
I need information on constructive solid geometry algorithms using polygons.  I have already figured algorithms for octree and voxel systems, but I'm running into big problems implementing this for polygons.... please help!
penguinninjaAsked:
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davekoCommented:
Try picking up a copy of Michael Abrash's Graphics Programming Black Book (Coriolis Books, 1997).  In case you don't know who Michael is, he works for id software and is one of their chief engine developers.  He's a math wiz and his compilation of articles published elsewhere as well as additional insight is published in this book.

also, if you want a hands on working example of CSG in action, go to ftp.idsoftware.com and download their quake 2 utilities & source files archive.  it contains a 3D level editor called QuakeEd4 that has full source code.  I don't encourage direct lifting of the code without proper credits/permissions but you should be able to get a general idea for what you're after.
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