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Shadow Cast

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Hi everyone, How do i do shadow casting if i have many objects in the world? do i have to prepare all the shadow matrix for each objects or there are some algorthm ro finish it all in once? thanks alot

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I'm not too sure what you mean by using shadow matrices for each object, but the most common -and easy- technique to cast shadows are stencil shadow volumes. A newer technique that is aparently becoming more popular is shadow mapping. The background and implementations of these techniques are available in GameDev's excellent article archive:

http://www.gamedev.net/reference/list.asp?categoryid=72#232

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