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adam17

Depth rendering problems

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im about to pull my hair out heh. ive been trying to render the depth of my scene to a texture. ive tried using the fixed function pipeline of ogl and framebuffers and neither work for me. when i do simple "render to texture" i get the correct image. when i use the GL_DEPTH_ATTACHMENT i cant see anything except for some VERY faint gray pixels on the rendered texture. im not sure if there is a problem with the texture format or my framebuffer format.
	glGenFramebuffersEXT(1, &fb);
	glGenTextures(1, &depth_tex);
	glGenRenderbuffersEXT(1, &rb);

	//switch to our fbo so we can bind stuff to it
	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);

	tex_dim = 128;
	//create the colorbuffer texture and attach it to the framebuffer
	glBindTexture(GL_TEXTURE_2D, depth_tex);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tex_dim, tex_dim, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, tex_dim, tex_dim, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, depth_tex, 0);
        //uncommenting the next line crashes on runtime
	//glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, depth_tex, 0);

	//create a render buffer as our depthbuffer and attach it
	glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
	glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, tex_dim, tex_dim);

	glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, rb);

...and when i render the fbo image
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
	//glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, depth_tex, 0);
	glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, rb);

any ideas? thanks in advance!

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