Merge piccu renderer

[tophyr]

Pull Request Type

• GitHub Workflow changes
• Documentation or Wiki changes
• Build and Dependency changes
• Runtime changes
  • Render changes
  • Audio changes
  • Input changes
  • Network changes
  • Other changes

Description

Replace renderer/ with the Piccu engine.

Related Issues

Likely massively conflicts with @Lgt2x's #457

Checklist

• I have tested my changes locally and verified that they work as intended.
• I have documented any new or modified functionality.
• I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

[Lgt2x]

No way we integrate that in one go. Need to go step by step, understanding changes and their implication. Piccu and this project have massively different goals and standards, if we want to merge we need to go slowly and wisely

[tophyr]

Yeah, I agree. This is mostly a POC. The overall goal, for this project, I think should just be "modernize the renderer" so that it uses GL3+, VBOs, and shaders. Piccu is one way to accomplish that, but certainly not the only one. This commit stack so far isn't even tested at runtime, I just literally got it to build on my macbook and put it up. Digging in to grok the old renderer, piccu renderer, and the differences, will take a chonkin bit more time.

[tophyr]

weird that none of these build failures occur locally for me. hm

[Lgt2x]

Let's close this one and cherry-pick rendering improvements one by one from Piccu. We can keep this work as a reference