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wenny

some problems with the frustum culling

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I know there is a near plane in a frustum, but I am wondering why objects between near plane and view point are unvisible. I am a foreigner ,so not very good at English.qvmx50bo

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They are clipped by gpu. Why? One reason is limited Z depth resolution, but probably there are other reasons as well..

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I find that it is not a easy job to construct a bounding volume for a node in
terrain rendering . Is there any good website or paper introducing some method

Quote:
Original post by Bulma
They are clipped by gpu. Why? One reason is limited Z depth resolution, but probably there are other reasons as well..


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Quote:
Original post by Bulma
They are clipped by gpu. Why? One reason is limited Z depth resolution, but probably there are other reasons as well..


As mentioned above, because of the way that the z buffer is worked out and spread having a frustum culling from 1 to 1000 and 0 to 1000 can mean the difference between a great level of accuracy and detail. It can result in z fighting problems.

Choose a good value for your near and far plane. A technique that is however sometimes used in very long distant scenes involves rendering the scene n times, where a certain area (bounded by two circles basically and growing each time) is rendered and then the frustum culling changed for then next rendering stretch.

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