GLSL RenderTexture

[rcpedersen]

Hi I am trying to use Mark Harris RenderTexture class to perform some multi pass volume rendering.

I have to perform at least 3 passes and I will have to store each pass in a render-texture.

How do I send a RenderTexture down to a GLSL fragment shader, so that I can perform an operation as:

gl_FragColor = gl_Color - texture2D(rayintersection,gl_TexCoord[0].st);

I have without success tried to use the following:

glUseProgramObjectARB(*direction);	
// results for previous pass, stored in a RenderTexture
g_prtRayIntersection->EnableTextureTarget(); 
g_prtRayIntersection->Bind();
glUniform1iARB(sampler, 0);

[guyinhell]

might it be that you didn't share display list shader programs and texture unit?

[rcpedersen]

No, the RenderTexture class shares by default,
lists, textures, and program objects.

[rcpedersen]

I have found the error ;-)