shadow mapping
Author
Has anybody any idea, how can i get the image back, which is the shadow map for gl_arb_shadow (GL_DEPTH_TEXTURE_MODE_ARB & GL_COMPARE_R_TO_TEXTURE_ARB)? I tried glGetTexImage, but all i get back is null data, is there some kind of undocumented magic involved with this?
Are you checking for GL errors? Calling glGetTexImage with a format of GL_DEPTH_COMPONENT should work.
Author
With GL_DEPTH_COMPONENT i get exactly same result, null data, and glgeterror is GL_INVALID_ENUM.
Quote:Original post by DelfiFind out what's causing that error and fix it. GLIntercept is a great help for this.
With GL_DEPTH_COMPONENT i get exactly same result, null data, and glgeterror is GL_INVALID_ENUM.
What are you doing with the data? If you are trying to dump it to a file, the issue maybe with floating point. The data returned I think is 0 or 1 or 0-1. Either way if you dump this to a unsigned char type it will be 0 due to rounding, casting. Not sure if this is the case or not....
Author
I dump it to file, i tried passing any constant that worked, and always get back zero data, not even floating point, it is just completely zeroed.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
