Remove necessity of folder structure src/Graphics/Util/util.*.glsl about diagrams-opengl HOT 7 CLOSED

Another option is using TemplateHaskell to read in the shaders as bytestrings at compile time - I've tried that before and it's not as friendly to updating as the other two methods.

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I've been meaning to switch over to TH, as I do in https://github.com/bergey/haskell-OpenGL-examples/blob/master/wikibook/tutorial-05-3D/TH.hs I figured that would make the shaders more pleasant to read & edit, but you're right that they shouldn't change often. Can you say more about to downsides to the TH method?

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This may be due to my noobness but what I found was that when I edited a shader the changes would not be integrated into the compiled project unless I deleted the intermediate file that ghc (or cabal, I'm not sure) produces containing the spliced TH code. Making edits to the shaders was therefore always a two step process. Since my motivation for separating the shaders from Haskell was just for syntax coloring I switched back.

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Though if the shaders are static then TH would be great.

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We agree that we should inline the shaders, either using TH or directly. The intermediate file issue you describe sounds really annoying, but I can't reproduce it. Could you try out the shader-th branch I just pushed?

I tested like this, and the shader change was picked up:

cabal install
ghcsandbox examples/curves # alias for sandbox-aware ghc
./examples/curves
# edit shader, make all fragments red
cabal install
ghcsandbox examples/curves
./examples/curves

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Confirmed working - I also couldn't recreate what I was talking about. It must have been something special in my build process. 👍

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Great. Thank you.

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