jsyrjala / zraytrace

Raytracing implemented in Zig language

zraytrace

Ray tracing implemented in Zig.

Inspiration

Code follows mostly Ray Tracing in One Weekend and Physically Based Rendering.

Features

Single threaded, uses only on CPU.

Materials:

• diffuse (matte)
• metal (fully reflective)
• dielectric (glass like objects)

Shapes

• sphere
• triangle

Textures:

• constant color
• image textures

Algorithms

• Bounded volume hierarchy

File formats:

• PNG images, read and write
• OBJ 3d models, read

Examples

Spheres

This doesn't use bounded volume hierarchy because its overhead is too big for scene with 7 spheres.

From the left:

• reflective texture mapped sphere (earth)
• hollow dielectric sphere (glass)
• diffuse texture mapped sphere (Nitor logo)
• filled dielectric sphere (glass)
• reflective sphere with silver color (mirror ball)
• diffuse green sphere (ground level)

Some statistics

• Surfaces: 7
• Pixels: 1000x1000
• Samples per pixel: 1000
• Max recursion depth: 30
• Total reflections: 1144753226
• Total background hits: 999892115
• Total pixels: 1000000
• Total samples: 1000000000
• Total rays: 2144645362
• Total reflections: 1144753226
• Pixels per second: 1619.68 pixels/s
• Total runtime: 617.41 seconds