Bump mapping issues

Graphics and GPU Programming Programming

Started by CRACK123 October 01, 2004 04:32 AM

1 comment, last by CRACK123 19 years, 6 months ago

235

Author

October 01, 2004 04:32 AM

Hey, I am trying to do bump mapping. The bump mapping seems to work but on the 2nd pass the texturing does not work. If I disable only the drawing part of vertices and textures coordinates in the first pass but not the setting up of multitexturing and the disabling of it, the 2nd pass texturing works fine. This is how I am doing it. Otherwise it only shows the bump map.


// first pass
glActiveTextureARB(GL_TEXTURE1_ARB);
this->m_NormalMap.BindCubeMap();
glEnable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_DOT3_RGB_ARB);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);
	
glActiveTextureARB(GL_TEXTURE0_ARB);
this->m_NormalMap.Bind();
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_REPLACE);

// now draw the vertices, textures, colors etc

....

// pass 2
glActiveTextureARB(GL_TEXTURE0_ARB);
glDisable(GL_TEXTURE_2D);

glActiveTextureARB(GL_TEXTURE1_ARB);
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
	
glActiveTextureARB(GL_TEXTURE0_ARB);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	
// pass 2
glBlendFunc(GL_DST_COLOR, GL_ZERO);
glEnable(GL_BLEND);
glEnable(GL_TEXTURE_2D);

// draw the vertices, texture and color info
.......

glDisable(GL_BLEND);

Could anyone point out as what I may be doing incorrectly Thanks

The more applications I write, more I find out how less I know

mikeman

3,017

October 01, 2004 05:24 AM

You probably set the DepthFunc to GL_LESS. For multipassing, you must set it to GL_LEQUAL. Also, why are you enabling both GL_TEXTURE_2D and GL_TEXTURE_CUBE_MAP_ARB for texture unit1? You just need cube texturing.

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CRACK123

235

Author

October 01, 2004 06:51 AM

Yeah that worked. Thanks

I didn't realize that with CUBE_MAP_ARB I don't need TEXTURE_2D. Thanks for pointing that out.

The more applications I write, more I find out how less I know