Perspective Projection

[Dennis]

On Friday, 28 July 2023 at 16:08:43 UTC, Ruby The Roobster wrote:
> Everything displays fine (with orthographic projection, of 
> course) if you leave the projection as the identity matrix, but 
> setting it as I have done results in a blank screen.

How do you pass the matrix to OpenGL? Be careful that gl3n uses 
row major matrices, but OpenGL uses column major matrices, so you 
either need to transpose it yourself, or pass `true` to the 
`transpose` argument in `glUniformMatrix4fv`.