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flodywan

gluPerspective() vs glFrustum()

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Is there an advantage one has over the other? From what I've read gluPerspective() makes the viewing window with an aspect ratio, whereas glFrustum() just defines the coordinates of the viewing window. Is that right? Which one do you use and why?

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gluPerspective() computes 4 floats, and calls glFrustum() with them.

Simply have a look at the maths:
http://www.opengl.org/sdk/docs/man/xhtml/gluPerspective.xml
http://www.opengl.org/sdk/docs/man/xhtml/glFrustum.xml

gluPerspective is preferred.

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Quote:
Original post by idinev
gluPerspective is preferred.

Except, of course, when glFrustum is preferred.

There are projection matrices that cannot be achieved with gluPerspective and the input they take are different, so which one is preferred depends on what you have and what you want to achieve.

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