Uniform instance for M44 wrongly treats it as column major

[raymoo]

It looks like the Uniform instance for the M44 Float (an alias for V4 (V4 Float)) type from linear assumes a column-major format, but linear itself treats it as row-major. In particular functions such as mkTransformation, lookAt, or perspective that produce matrices with translation components will behave most obviously badly. The rotation component of matrices likely suffer from reversed rotation directions (I did not test for this problem).

[hadronized]

Hm, I didn’t have any issue with this – I don’t annotate my shaders with any major things. Do you have an example of problematic code? Thanks for reporting, by the way! ❤️

[raymoo]

It was for an assignment, so I can't post the code as-is, but the Storable instance for M44 (used at https://hackage.haskell.org/package/luminance-0.11.0.4/docs/src/Graphics-Luminance-Core-Shader-Program.html#line-823) will end up storing it in row major order, while OpenGL's matrix-uniform-setting functions assume a column major order.

I can try to whip up an example this weekend.

[raymoo]

Sorry for lagging on writing a broken example.

Is there an example somewhere of sending camera matrices as uniforms and using them in the shader?