FBO and depthmap

Graphics and GPU Programming Programming

Started by MARS_999 December 30, 2005 07:54 AM

0 comments, last by gulgi 18 years, 3 months ago

MARS_999

1,627

Author

December 30, 2005 07:54 AM

Is it correct or even needed to use these function when setting up a depthmap in a FBO?


glTexParameterf(texture_target, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
glTexParameterf(texture_target, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);

As of now I have tried both ways and neither makes a difference? Thanks

gulgi

315

January 01, 2006 04:06 AM

Those two lines is used when shadowing (when you already have the depth-texture) and tells the hardware to do the computations for you.

When you are "setting up" a depthmap, it shouldn't make any difference.
Go to http://oss.sgi.com/projects/ogl-sample/registry/ and read about the extensions if you arn't sure how they work...

Btw.. what are you trying to do? :) Reading a tutorial on shadowmapping might help. ^_^

Good luck!

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