There are good resources online for software rasterizers: https://www.scratchapixel.com/lessons/3d-basic-rendering/rasterization-practical-implementation/persp

There are good resources online for software rasterizers: https://www.scratchapixel.com/lessons/3d-basic-rendering/rasterization-practical-implementation/perspective-correct-interpolation-vertex-attributes https://www.scratchapixel.com/lessons/3d-basic-rendering/ras... https://fgiesen.wordpress.com/2013/02/08/triangle-rasterization-in-practice/ https://fgiesen.wordpress.com/2013/02/08/triangle-rasterizat... As a graphics programmer, I find the example code extremely readable. If you recognize the math, you'll recognize the rest.