Run opencl without pycuda

Fix #15 (closed)

This includes !76 (merged).

If anyone wants to use textures on OpenCL, we need to decouple TextureInterpolatedField from CUDA.

changed the description

Thanks. Shouldn‘t the other OpenCL tests be skipped if CUDA is not available since they require both OpenCL and CUDA?

Also, I don‘t fully understand why you‘re testing OpenCL against CUDA. Wouldn‘t it make more sense to test against CPU so the tests work everywhere?

Hi. I'll skip the tests if pycuda is not installed.

I first compared against numpy but assert np.allequal failed with a small error (about 1e-5). I could have increased the epsilon but found that the error is almost zero if the code runs on the same device (CUDA vs OpenCL).

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• e9605ab2 - Skip OpenCL tests that require pycuda if pycuda is not installed

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Hi. I'll skip the tests if pycuda is not installed.

I first compared against numpy but assert np.allequal failed with a small error (about 1e-5). I could have increased the epsilon but found that the error is almost zero if the code runs on the same device (CUDA vs OpenCL).

So the comparision with CUDA is just a random coincidence when we quickly assembled the OpenCL backend to show a student how pystencils works.

merged

mentioned in commit 09a59f7f