Building my own rasteriser: part 1 - setting up
I’m going to learn how rasterisation works! First: what tools and libraries should I use, and how do I set it all up?
Building from scratch a renderer that works the same way as OpenGL, and everything I learned on the way.
Building my own rasteriser: part 2 - getting the toolchain to like, do anything
I get used to compiling code using minGW, and plan out the steps of the algorithm
Building my own rasteriser: part 3 - what is a triangle?
Some basic geometry, with a view to how we represent vectors and triangles.
Building my own rasteriser: part 4 - matrix wrangling
Building up the model-view-perspective matrix.
Building my own rasteriser: part 5 - partial function application?
Let’s calculate some Normalised Device Coordinates!
Building my own rasteriser: part 6 - nearly there
Working out whether a pixel is inside a triangle, and if so, what its barycentric coordinates are.
Building my own rasteriser: part 7 - mmmmm LaTeX
Rederiving perspective-correct depth interpolation for the sake of curiosity.
Building my own rasteriser: part 8 - pixels! on! the! screen!
I get the first image out of my program and get very excited.
Building my own rasteriser: part 9 - loading more complex models
The program gains command-line arguments, and the ability to load geometry from .obj files.
Building my own rasteriser: part 10 - today you learn what a BRDF is
Unsatisfied with the derivation on Scratchapixel, I work through the maths of a Bidirectional Reflectance Distribution Function.
Building my own rasteriser - part 11: lights!
Introducing Lambertian diffuse shading and directional (‘sun’) lights to our setup.
Building my own rasteriser: part 12 - an epiphany!
I realise there’s a much more starightforward way handle lighting and refactor hard… and finally get that shading.
Building my own rasteriser: part 13 - pretty coloured lights!
Coloured lights and surfaces are enabled. Things no longer have to be red.
Building my own rasteriser: part 14 - it moves! it moves!
Animated output! Hell yeah.
Building my own rasteriser: part 15 - smooooooooth
I attempt to interpolate normals to produce smooth shading. Unfortunately, it will later turn out I made some errors in the algebra.
Building my own rasteriser: part 15.5 - oops
I realise a mistake in my calculation of normal interpolation.
Building my own rasteriser: 15.6 - escaping from libpng hell
I want to deal with PNG files. Simple, right? Ha. Ha. Ha.
Building my own rasteriser: part 16 - the final stretch!
I fix the normals problem, and make some adjustments to backface culling to better imitate OpenGL. We finish by rendering a model from a real videogame.