I’m trying to render a simple 3D model over the top of a video stream by calling OpenGLES rendering code inside the onWZVideoFrameRendererDraw callback, but z-sorting isn’t working for me.
The same rendering code is working for me elsewhere without problems, so I’m guessing that there is no depth buffer. I tried to check using eglGetConfigAttrib but the EGL10 object doesn’t seem to be provided by WZGLES.EglEnv.
Does the EGLContext used by GoCoder for rendering have a depth buffer? Is there any way to request one?
Just to answer my own question, I was never able to figure out how to obtain a depth buffer in the OpenGLES context available within the onWZVideoFrameRendererDraw callback, so I worked around this by creating a frame buffer object with an associated render buffer with a depth buffer, and using it to render my objects to a texture, then rendering this texture using alpha transparency over the top of the video frame.
This blog post is a useful reference for anyone wanting to do similar:
http://opengles2learning.blogspot.co.nz/2014/02/render-to-texture-rtt.html
Good job! I was just looking for how to do it. Thanks for the answer and for the granted resource. I’ll try to do similar necessarily.
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Thanx!