Question 1

How to set up Hylogen for live shader coding?

Accepted Answer

Install Hylogen and Hylide using Stack or Cabal, then run 'hylide Example.hs' to start a WebGL server. Changes to the Haskell file will auto-recompile and update the shader in your browser at localhost:5678.

Question 2

Hylogen vs raw GLSL: which is better for performance?

Accepted Answer

Hylogen adds abstraction that might introduce minor overhead, but it optimizes code via observable sharing. For critical performance, hand-written GLSL is preferable, though Hylogen's type safety reduces debugging time.

Question 3

Can I use Hylogen with OpenGL instead of WebGL?

Accepted Answer

Yes, Hylogen generates standard GLSL code that can be used with OpenGL. However, the live coding tool Hylide is WebGL-specific, so you'd need to handle shader compilation manually for other APIs.

Question 4

What types of shaders does Hylogen support?

Accepted Answer

The example focuses on fragment shaders, but Hylogen can generate GLSL for various stages. Check the source or Hackage documentation for support on vertex, geometry, or compute shaders.

Question 5

How do I integrate Hylogen into an existing Haskell project?

Accepted Answer

Add Hylogen as a dependency in your Cabal or Stack file, import the module, and use 'toProgram' to convert Haskell expressions to GLSL programs for use with graphics API bindings like OpenGL or WebGL.

Question 6

Is Hylogen actively maintained?

Accepted Answer

Check the GitHub repository and Hackage for recent updates. As of the README, it's on Hackage, but maintenance might be sporadic, so look for recent commits or issue activity.

Hylogen

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