https://github.com/exoad/software_rasterizer
Let your CPU cosplay as a GPU 💅!
https://github.com/exoad/software_rasterizer
Last synced: 3 months ago
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Let your CPU cosplay as a GPU 💅!
- Host: GitHub
- URL: https://github.com/exoad/software_rasterizer
- Owner: exoad
- License: bsd-3-clause
- Created: 2025-05-31T01:31:15.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2025-06-09T22:49:13.000Z (about 1 year ago)
- Last Synced: 2025-10-05T21:33:48.733Z (8 months ago)
- Language: C
- Homepage:
- Size: 142 KB
- Stars: 2
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
software_rasterizer
**Let your CPU cosplay as a GPU 💅!**
This was a simple hobby project made on the side with what I learned from resources online. It uses the CPU
to perform the rasterization process, the magical process of turning 3D stuffs to be viewable on your 2D screen.
Currently, this rasterizer only has a builtin parser for loading Wavefront Object files, but you can definitely
pipe your own.
## Chores
This project is not finished and should serves as just mainly inspiration and learning material for myself. There are some things
that I would like to work on within:
- [ ] Fixing up the current triangulation method of using Fan Triangulation and improving it to work for concave polygons better.
- [ ] Utilize the cglm graphics math library instead of my own (my math skills is questionable)
- [ ] Move to rendering with basic STB files with Sokol and windowing and rendering to a window using SDL.
- [ ] Implementing some kind of culling method with backface and frustum methods
- [ ] Optimize the math currently used for projection and NDC calculations (which are wrong)
## Building
This project uses a very simple [Makefile](./Makefile).
By default it compiles without an address sanitizer (because I am on Windows and the GCC MingW64 installation I have
does not have a native ASAN port and I am too lazy):
```bash
make re
```
Outputs a final executable in the root directory and other compiled objects are located in [`/obj`](./obj/)
> Running `make` also works, but it can be problematic for not cleaning up old compilation stuffs
If you have and can link with an address sanitizer build it with the `asan` target:
```bash
make asan
```
## Resources
1. [UT Austin CS354](https://www.cs.utexas.edu/~theshark/courses/cs354/lectures.html)
2. [Paul Bourke Object Files](https://paulbourke.net/dataformats/obj/)
3. [Cornell CS4620 View Explorer](https://www.cs.cornell.edu/courses/cs4620/2019fa/demos/view_explore/view_explore_ortho.html)
4. [UAlberta ~ BMP File Format](https://www.ece.ualberta.ca/~elliott/ee552/studentAppNotes/2003_w/misc/bmp_file_format/bmp_file_format.htm)
5. [The Base Mesh](https://www.thebasemesh.com/model-library)