d0nuts

So the problem was using all of the EXT functions and variables instead of the normal ones (ex. glBindFramebufferEXT() instead of glBindFramebuffer() ).

Awesome! Thank you!

Found it! Apparently there is something called cgEnableTextureParameter(). I don't understand why you would set a texture parameter but not have it enabled :/

But my question about the projection still stands!

Sorry for the confusion. Let me try rewording it. With the simplest shader just outputing a color, it fills the screen. But when I project the points by multiplying by the modelviewproj and check if they are within the bounds of the screen, only the top corner projects into this range. Am I misunderstanding something about projection?

 

And I tried this fragment shader with just pass-through texture coordinates and am still getting all black.

 

ShadowVisualDataPixelOutput ret;

float depth = tex2D(depthTex, pdi.texture).x;
if (depth == 0.0f) {
	ret.color = float4(0,0,0,0);
	return ret;
} else {
	ret.color = float4(depth, depth, depth, 1);
	return ret;
}

Thanks for the response!

 

 

I don’t know what you mean by this being the only thing you are “getting”. This is the only region over which you are not drawing blue. See image.

 

 

I am rendering a single quad that should cover up the whole screen exactly. If I use a fragment shader that just outputs a single color, it fills the screen completely. But when I multiply the vertex coordinates by model view projection matrix, store them, and then check in the fragment shader if they are exactly the screen (0 < x < 720 and 0 < y < 480) only the top right half projects into this. I am misunderstanding something about the projection?

 

 

(0.5f, 0.5f) and (1.0f, 1.0f) also return 0. Maybe I am setting something up wrong:

 

// Creation

glGenTextures(1, &depthTexture);
glBindTexture(GL_TEXTURE_2D, depthTexture);	
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, width, height, 0, GL_DEPTH_COMPONENT, GL_FLOAT , 0);	
glBindTexture(GL_TEXTURE_2D, 0);

...

// Attach to fbo

glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTexture, 0); glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTexture, 0);

 

checkStatus() <-- returns complete okay!

// Bind to fbo, render scene once, then switch back to default

 

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, depthFramebuffer);

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

renderHWLoop();

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

 

...

//switch to visualizing programs

//eventually these get called

 

fragmentDepthText = cgGetNamedParameter(fragmentProgram, "depthTex");

cgGLSetTextureParameter(fragmentDepthText, depthTexture);