Hi there, i have to comment on that discussion a little bit. Would be interesting to be wrong. Hidden line removal: this technique is used to solve the visibility of objects, while displaying only the border. This technique was used as people started to think about 3d graphics on a computer. The algorithms around this topic are very tricky and suffer from big constraints the objects must provide. (Elite was the first game on the Commodore 64 that used hidden line removal on convex objects). Especially HLR is nothing that is funny to do in hardware. So the Java3D API will not do this at a feasibly performance. A second technique to solve the visibility is the Z-buffer algorithm that keeps track of the pixels z coordinate when painting a pixel onto the screen. This approach is quite easy to accomplish in hardware and every accelerating graphics card uses z buffering. The question is: what do you want to accomplish?? If you want to draw a mesh of an object it will be without hidden line removal. Hidden line removal is never on/off using the Java3D API. Best regards, Karsten
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