The goal of this project was for me to learn about the fundamentals of rasterization and realtime rendering. I had written a few ray tracers prior to this project, but never an actual rasterizer that could render hundreds of triangles at a reasonable framerate. I started by following Youtube tutorials by javidx9 and thebennybox. I later searched up individual topics to make sure I understood each part of the process. The gained knowledge could then be combined into this project, and I also implemented extra features which interested me.
- Rasterizes triangles in realtime
- Transforms triangles from local space all the way to screen space
- Clipping
- Perspective correct texturing
- Back-face culling and depth testing opaque geometry
- Load and render OBJ-models
- Custom functions for applying calculations on vertices and pixels, similar to shaders but on the CPU
The project contains six scenes to showcase different aspects of the engine:
- Textured quad to easier visualise clipping
- Textured quad rendered using a "CPU pixel shader"
- Monkey head loaded from an OBJ-file
- Monkey head rendered using a "CPU pixel shader"
- Wave animation inspired by Gerstner waves using a "CPU vertex shader"
- A TempleOS animation. (It was implemented mostly because I thought the dithered shading looked interesting)
Eclipse 2021-03 is the recommended IDE, but most versions of Eclipse should work.
A first-person camera can be controlled when running the project. "WASDEQ" keys moves the camera while the arrow keys will rotate it. Pressing "R" switches between filled- and wireframe mode. Pressing "T" will switch between perspective correct- and affine texture mapping. The number keys 1-6 switches the current scene to one of the scenes listed above.
