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Visibility of a Cylinder

Since a full visibility check for a cylinder would be computationally expensive, we perform the following simple test: Let P be the point on the axis of cylinder C that is closest in height to the cyclopean origin O. Then we say that C is visible if tex2html_wrap_inline3248 , where r is the radius of C. Since the cylinders in a typical virtual marine world in our animation are fairly scattered, the occlusion test is neglected.


next up previous contents
Next: Visibility of Seaweeds Up: Computing Visibility Previous: Visibility of Another Fish
Xiaoyuan TuJanuary 1996