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IPeetry

How do I find the dimensions of the far plane of a viewing frustrum?

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In a directx9 application how would i achieve this? any help would be much appreciated. Cheers

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Its all in the title, any help would be much appreciated. Cheers


Use FOV /2 to get angle from center of far plane to top edge. The sine of this angle * far plane depth will give you 1/2 the height. Double it to get the farplane Hieght, and use the aspect ratio to get the width.

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