Displaying depth buffer as image on openGL

Question

I am using freeglut, and have a simple 3-D model (it is just a cube) that I can display on my screen. I am trying to obtain the depth map of this cube given the current coordinates and orientation of the camera and display the depth map on some window.

Is this possible? If so, how?

score 0 · Accepted Answer · answered Oct 29 '17 at 17:05

0

You can create Frame Buffer Object FBO and attach only depth texture to it. Now while rendering just bind this FBO and render. The depth texture attached toFBO will have depth values. Now Bind this texture and use function like glReadPixels and get data of attached texture in some buffer. Then using some library like SOIL you can save it to format you want like ong or jpeg.

answered Oct 29 '17 at 17:05

Paritosh Kulkarni

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Thanks! Do you know of any existing tutorials/codes that I can use to perform the above? – user308485 Oct 29 '17 at 17:07
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Don't use `glReadPixels` if you just want to display the buffer (i.e. the data should stay in GPU memory). – Nico Schertler Oct 29 '17 at 17:09

Displaying depth buffer as image on openGL

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