Hi,
I want to output depth from a POV at fragments whose coordinates are from another POV.
In fact, I want to display objects from my camera POV, but for each fragment, I want to render depth from another camera POV.
Is that possible ?
[EDIT]
I will try to explain myself better.
In fact, I have some object seen from my main POV, the one used to display objects.
I would like render those objects exactly but from another POV, in order to get depth and some other things.
You want the depth at each position visible from camera A relative to another cameras position B?
If that's what you want, that's possible by projecting the fragments onto the 2. camera in a fragment shader. That's also done for shadowmapping, maybe you want to look up how that's done and if it helps with your problem.
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
SetupCamera();
RenderObjects();
glClear(GL_DEPTH_BUFFER_BIT); //Clear depth only
glColorMask(FALSE, FALSE, FALSE, FALSE); //Will disable color writes
Setup_NEW_Camera_POV();
RenderObjects();
glColorMask(TRUE, TRUE, TRUE, TRUE);
------------------------------
Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);
In fact, what I need is much more complex than that, and I drop off this idea because of its complexity (F*M*N) in my case, which is far from RT.
But thanks everyone for your answers, it may help others (or me, another time!)
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