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W pleasure, W fun [3D graphics]

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1 Author(s)
Blinn, J.F. ; Microsoft Corp., Redmond, WA, USA

The whole point of doing 3D graphics is the third dimension. Since the screen is only two-dimensional, the third dimension appears only indirectly in terms of perspective and occlusion. Correct occlusion testing is, however, fairly sensitive to precision problems in the depth calculation. I review the traditional way to represent depth and describe a new technique that appears in the new generation of 3D graphics boards. This technique has become practical as a side effect of perspective-correct texture mapping hardware. Both ways have their good and bad points, so I establish some rules of thumb on which method to choose in a given situation

Published in:

Computer Graphics and Applications, IEEE  (Volume:18 ,  Issue: 3 )

Date of Publication:

May/Jun 1998

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