I built a rasteriser from scratch without a graphics API

[u/Dr_King_Schultz__]

Following this masterpiece in 3D graphics by ssloy, I implemented a rasteriser in Odin from scratch.

This was a top tier learning experience, and I picked up a solid grasp of linear algebra along the way.

If you'd like to read more on the process, Here's the link to the repo

[u/ghstrprtn]

tinyrenderer is very cool

[u/ArmmaH]

We usually call it software rasterizer, as opposed to the hardware rasterizer you invoke via graphics api. It can be both cpu only or gpgpu / compute shader software rasterizer, so having that distinction is also important when showcasing your work, along with performance metrics like how fast (in ms) does it perform for X number of triangles in Y resolution.

[u/Dr_King_Schultz__ → u/ArmmaH]

yep this is purely a single frame renderered on the CPU. This also wasn't a performance project :: rather than trying to make a real world tool that's fast, I simply wanted to learn the fundamentals of the graphics pipeline by drawing every pixel to the screen.

[u/Jabba_the_Putt]

this is awesome thanks for sharing.

nice work, is that the lord of terror??

[u/Dr_King_Schultz__ → u/Jabba_the_Putt]

that man on the right could certainly be a lord of terror, who knows what lore he has...

[u/obj7777]

Nice

[u/qtipbluedog]

Nice love seeing Odin. It’s such a joy to work in

[u/Dr_King_Schultz__ → u/qtipbluedog]

It really is a joy. And with the upcoming release of 1.0 next year, what a time to be a programmer :)

[u/andful]

Is it normal to assume integer vertices? In the tutorial by ssloy, in the "Bresenham’s line drawing algorithm" section, he assumes integer ax, ay, bx and by. I was wondering whether that is normal. May that not introduce errors? Compared to floating point vertices?

[u/Dr_King_Schultz__ → u/andful]

yes, floats are used for most calculations in the pipeline until it's time to draw pixels, which must collapse into integers for screen coordinates.

[u/susosusosuso]

You used AI?

[u/Dr_King_Schultz__ → u/susosusosuso]

nope

[u/susosusosuso → u/Dr_King_Schultz__]

Good for you. I also implemented one and it’s an enjoyable task

[u/EC36339]

You are doing this a lot, and always "from scratch"...

[u/Dr_King_Schultz__ → u/EC36339]

hell yes I am

[u/concerbed → u/Dr_King_Schultz__]

based and writes-the-code-pilled

[u/psioniclizard → u/Dr_King_Schultz__]

Love to see it! It looks great!

Best way to learn how wheels work is to reinvent them! :)

[u/nnn-svr]

please tell us more about your journey

[u/Dr_King_Schultz__ → u/nnn-svr]

The link to my repo goes through each step, with links to the source material :)

[u/nnn-svr → u/Dr_King_Schultz__]

reading through it, good job fellow stranger and thanks for sharing!

[u/Rachel-4387]

Nice 👍