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发表于 2005-3-17 14:03:00
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Re:[原创]水墨渲染初探
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The idea is similar to shadow volume extrusion on the GPU. You extract all edges on the model and store the face normals from the both triangles the edge connects. When one is front-facing and the other backfacing, it's a silhuette edge. After figuring out whether we're on a silhuette edge or not we need to destroy edges that aren't. There's no direct way to destroy it, but we can throw it out to infinity though. This is easily done by setting w to 0. |
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