Raytracer

Documentation

Scenes

scenes/cornell_box.cr

400x400px, 20000 samples / pixel, time: ~4h

scenes/light2.cr

800x400px, 10000 samples / pixel, time: 2h15m

scenes/teapot.cr

400x400px, 100 samples / pixel, no lights, 2464 triangles with interpolated normals, time: 64s, 60s, 120s

The cube map in this example is "Yokohama 3" by Emil "Humus" Persson, licensed under CC BY 3.0

scenes/minecraft.cr

800x400px, 100 samples / pixel, no lights, time: 410s

scenes/fractal1.cr

400x400px, 5 samples / pixel, no lights, time: 3m10s

scenes/fractal2.cr

800x400px, 3 samples / pixel, no lights, time: 18s

scenes/fractal5.cr

400x400px, 5 samples / pixel, no lights, time: 30s

[WIP] scenes/sponza.cr

400x400px, 5000 samples / pixel, 1 light, time: 13h

Model: Crytek Sponza

[WIP] scenes/sponza_phong.cr

400x400px, 5 samples / pixel, 1 light, phong lighting, time: 37s

Model: Crytek Sponza without Banner

scenes/metaball.cr

800x400px, 10 samples / pixel, no lights, time: 5m

The cube map in this example is "Yokohama" by Emil "Humus" Persson, licensed under CC BY 3.0

In order to run this example:

1. Download the set of cubemaps
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
• Raytracing: the Next Week
• Raytracing: the Rest of your Life
• Modeling with Distance Functions
• Distance Estimated 3D Fractals (I-V)

Models

• teapot.obj (Utah teapot, used by scenes/teapot1.cr)