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https://github.com/l3kn/raytracer
CPU Raytracer written in the crystal language
https://github.com/l3kn/raytracer
computer-graphics crystal fractal raytracer
Last synced: 8 days ago
JSON representation
CPU Raytracer written in the crystal language
- Host: GitHub
- URL: https://github.com/l3kn/raytracer
- Owner: l3kn
- License: mit
- Archived: true
- Created: 2016-04-29T14:53:26.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2019-08-24T00:04:42.000Z (about 5 years ago)
- Last Synced: 2024-08-03T17:13:56.117Z (4 months ago)
- Topics: computer-graphics, crystal, fractal, raytracer
- Language: Crystal
- Homepage:
- Size: 20.2 MB
- Stars: 45
- Watchers: 7
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-crystal - raytracer - CPU Raytracer with examples (Misc)
README
# Raytracer
[Documentation](https://docs.leonrische.me/raytracer/)
## Scenes
### `scenes/cornell_box.cr`
![](images/cornell.png)
_400x400px, 20000 samples / pixel, time: ~4h_
### `scenes/light2.cr`
![](images/light2.png)
_800x400px, 10000 samples / pixel, time: 2h15m_
### `scenes/teapot.cr`
![](images/teapot_lambertian.png)
![](images/teapot_metal.png)
![](images/teapot_dielectric.png)_400x400px, 100 samples / pixel, no lights, 2464 triangles with interpolated normals, time: 64s, 60s, 120s_
The cube map in this example is
"[Yokohama 3](http://www.humus.name/Textures/Yokohama3.zip)" by
[Emil "Humus" Persson](http://www.humus.name/index.php?page=Textures),
licensed under [CC BY 3.0](http://creativecommons.org/licenses/by/3.0/)### `scenes/minecraft.cr`
![](images/minecraft.png)
_800x400px, 100 samples / pixel, no lights, time: 410s_
### `scenes/fractal1.cr`
![](images/fractal1.png)
_400x400px, 5 samples / pixel, no lights, time: 3m10s_
### `scenes/fractal2.cr`
![](images/fractal2.png)
_800x400px, 3 samples / pixel, no lights, time: 18s_
### `scenes/fractal5.cr`
![](images/fractal5.png)
_400x400px, 5 samples / pixel, no lights, time: 30s_
### [WIP] `scenes/sponza.cr`
![](images/sponza.png)
_400x400px, 5000 samples / pixel, 1 light, time: 13h_
Model: [Crytek Sponza](http://www.crytek.com/cryengine/cryengine3/downloads)
### [WIP] `scenes/sponza_phong.cr`
![](images/sponza_phong.png)
_400x400px, 5 samples / pixel, 1 light, phong lighting, time: 37s_
Model: [Crytek Sponza without Banner](http://graphics.cs.williams.edu/data/meshes.xml#2)
### `scenes/metaball.cr`
![](images/metaball.png)
_800x400px, 10 samples / pixel, no lights, time: 5m_
The cube map in this example is
"[Yokohama](http://www.humus.name/Textures/Yokohama.zip)" by
[Emil "Humus" Persson](http://www.humus.name/index.php?page=Textures),
licensed under [CC BY 3.0](http://creativecommons.org/licenses/by/3.0/)In order to run this example:
1. Download the [set of cubemaps](http://www.humus.name/Textures/Yokohama.zip)
2. Unzip the folder
3. Convert each .jpg to .png
e.g. using `mogrify -format png *.jpg` etc.
(`convert` is part of the imagemagick)
4. Copy all six png files (`negx.png`, `negy.png`, `negz.png`, `posx.png`, `posy.png`, `posz.png`) to `cube_maps/Yokohama`
5. Mirror `negx.png`, e.g. using `convert negx.png -flop negx.png`## Resources
* [Raytracing in One Weekend](http://in1weekend.blogspot.de/2016/01/ray-tracing-in-one-weekend.html)
* [Raytracing: the Next Week](http://in1weekend.blogspot.de/2016/01/ray-tracing-second-weekend.html)
* [Raytracing: the Rest of your Life](http://in1weekend.blogspot.de/2016/03/ray-tracing-rest-of-your-life.html)
* [Modeling with Distance Functions](http://iquilezles.org/www/articles/distfunctions/distfunctions.htm)
* [Distance Estimated 3D Fractals (I-V)](http://blog.hvidtfeldts.net/index.php/2011/06/distance-estimated-3d-fractals-part-i/)## Models
* `teapot.obj` (Utah teapot, used by `scenes/teapot1.cr`)