https://github.com/kach/voxel

Yet another raytracer, because we don't have enough of those already
https://github.com/kach/voxel

Last synced: 4 months ago
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Yet another raytracer, because we don't have enough of those already

• Host: GitHub
• URL: https://github.com/kach/voxel
• Owner: kach
• Created: 2017-03-05T18:10:36.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2017-03-05T18:18:41.000Z (over 9 years ago)
• Last Synced: 2025-06-24T10:11:36.283Z (12 months ago)
• Language: Scheme
• Size: 163 KB
• Stars: 5
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
Sometime in June 2016 I decided to revisit raytracers, and to see how much of a

raytracer I could build without looking anything up. `voxel.scm` is a full

recursive raytracer optimized for voxels. It uses the Phong illumination model

(ambient + diffuse + specular). Nothing fancy.

`voxel.scm` contains a homemade BMP encoder, and, with appropriate `load-*`

headers, it should work with any R5RS Scheme implementation. I tested it with

Chicken and Racket, and also with Biwas though Biwas was sadly too slow to be

practical.

This is the kind of thing `voxel.scm` can do very quickly:

![Here's a thing](temp.png)

It turns out you can find a [CT

scan](http://graphics.stanford.edu/data/voldata/voldata.html#bunny) of the

Stanford Bunny online. This is what you get if you approximate it with a

hundred voxels:

![Here's a bunny](bunny.png)

For comparison, here's some output from my old (December 2012) raytracer:

![Here's a sphere](sphere.png)