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Glut depth buffer

Started by phong666 Jan 21, 2003 at 10:50 AM 4 replies 1.3k views

Original Post

Jan 21, 2003 at 10:50 AM

I''m using the glut library to create my OpenGL window and set the display mode via glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH); The standard size for the depth buffer is 16 bits, but I need 32 bits precision. How can I change the depth buffer size? Thanks in advance

edotorpedo

Jan 21, 2003 at 11:07 AM

The most simple way would be to change the constant GLUT_DEPTH in glut.h from 16 to 32

Edo

Brother Bob

Mod

218

Brother Bob

Jan 21, 2003 at 11:18 AM

You obviously don''t understand why GLUT_DEPTH is set to 16. GLUT_DEPTH is a flag, the fifth bit in an integer, which happens to have the decimal value 16. If you change it to 32, it will represent the sixth bit, which means asking for a stencil buffer (GLUT_STENCIL is defined as 32).

TomasH

Jan 21, 2003 at 11:24 AM

glutInitDisplayString seems to do what you want.

http://flex.ee.uec.ac.jp/texi/glut/glutInitDisplayString.3xglut.html

phong666

Author

phong666

Jan 21, 2003 at 3:52 PM

Thanks for your help.

A call to glutInitDisplayString() did the trick.

zedzeek

164

zedzeek

Jan 21, 2003 at 10:41 PM

btw many cards dont support 32bit depth
eg with all nvidia cards 24bit is the max

http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html

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