ref: 5b93335dd430e09a71ebaba131826cd7db154cb4
parent: e90bf70b0d7167166a3c84e4f3e9277ce4a7e97a
author: rodri <rgl@antares-labs.eu>
date: Tue Feb 13 11:40:31 EST 2024
lay out the grounds for a scene renderer. also fixed an issue with cliptriangle() where an entire tri would get discarded if all its vertices were outside the frustum.