I have been trying to implement the obstacles in ofxFluid on a macbook air running Mac OSX 10.11 for a while and keep getting some strange behaviour. I reinstalled 10.10 on a mac mini and the obstacles run perfectly. I am unsure of how to fix this. The mac mini has an ivy bridge i7 and the air has a haswell i5. The openGL versions appear to be identical for both of these machines.
While running on the air I get the following error on the console:
[ error ] ofGLUtils: ofGetGLFormatFromInternal(): unknown internal format 34843, returning GL_RGBA
I believe this is from this line in ofxFluid:
initFbo(divergenceFbo, gridWidth, gridHeight, GL_RGB16F);
I have uploaded four images from a sequence showing the addition of obstacles and the result, displaying four of the different FBO’s used within ofxFluid. You can see them here:
Tumblr link with 4 photos
If more people can try ofxFluid (and ofxFX) with obstacles on El Capitan to see if it is just that system which has the problem, that would be great.