Hello Michael,
On 11/08/2010 05:09 AM, Michael Raab wrote:
> I'm trying to render a height map of some of our 3D scenarios.
> So I'm rendering from the top center of the worlds bounding volume using a
> orthograhic camera. I thought I could try to use a FBOViewport for that
> purpose but until now I get no reasonanble result (the resulting image is
> empty).
> I've attached my source code, maybe someone can have a look?
> // get camera position
> Vec3f camPos(
> vol.getMin().x() + (vol.getMax().x() - vol.getMin().x())/2.0f,
> vol.getMin().y() + (vol.getMax().y() - vol.getMin().y())/2.0f,
> vol.getMax().z()
> );
I don't see where you make the camera look down. This only places it at
the top center of the bounding box, but it's still looks along the
negative z axis, so probably does not see your scene at all.
Also, I'm afraid the FBOViewport currently misses code to actually read
back anything but the color buffers. Can you render with a shader that
writes (linear) depth to a texture instead?
Cheers,
Carsten
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