#raycasting

I’ve been building a Wolfenstein 3D / ES: Arena-style renderer from scratch in plain JavaScript on the HTML5 Canvas. This isn’t WebGL; it’s a real, authentic, old-school raycaster using the same techniques as those games: per-column DDA ray stepping on a 2D grid, proper distance-corrected texturing, floor/ceiling casting, a z-buffer for sprite occlusion, Archways, Mid Textures, windows you can see through (Portals Sorta.) the works.

This last update smooths out Firefox support, smoother performance, and a bunch of gameplay/visual upgrades. If you’re into retro tech or just curious how 90s 3D was faked, give it a spin and tell me what you think.

I’m trying to build a simple raycast vehicle simulation, but I’m having trouble applying forces at the wheels instead of the center of gravity. Specifically, I can’t get a normal force to hold the car up without creating an oscillation forward and backward. This is a common challenge when simulating vehicles with non-centered mass distributions. In my test setup, there’s a motorcycle on flat…

This is a 3D engine made using the Scratch block-based programming engine. It features realistic lighting, shadows, textures, sprites, spatial sound, and more. I forgot to post this version on Tumblr when I released it, but it's easily the largest release yet.

This release adds variable wall heights, bilinear texture filtering, and even more features!

Raycasting on an NES

Well, Famicom rather, but it does work on the NES too, haha.

Here's a textured raycaster running on my AV Famicom, but it should work with any other Famicom-compatible hardware. [...]