RayTracer

CPU and GPU Ray Tracer

Features:

• Sphere and static mesh
• Specular, emissive and emissive materials
• Gloss, reflection and refraction
• Focal length and aperture
• Blend between perspective and orthographic projection

Integration with Godot 4.6 for real time scene edition

Gallery

Cornell box

Monument

Rainbow

Man sitting

Releases

2.5

• Integration with Godot 4.6

2.4

• GPU-based implementation (compute shader)

2.3

• Cornell box scene finalized
• Static mesh rendering
  • Backface detection for transparency
  • No acceleration structude ofr triangles yet
  • No static mesh assets yet
• ISPC integrated with the project and used for basic
• Better compile times
• CppCheck and BuildInsights pass
• Huge code refactor
• Better logging with spdlog

2.2

• Full scene editor
  • Flying camera
  • Object selection and movement
  • Material editor

2.1

• The same set of materials and primitives
• Renderer interface, with example and reference CPU renderer, easy to hot-swap with another version
• Simpler algorithm, no PDF in use
• Refraction with smoothness
• Coloured refraction
• Gloss with smoothness

1.0

Based on books: [Ray Tracing in One Weekend] by Peter Shirley

• Editor UI
  • Scene setup: spawn/delete/move/edit object properties
  • Render parameters
  • Settings
  • Real time output update
  • Save output to BMP file
• Renderer
  • Monte Carlo based method, mix of light and surface cosine based probability density functions (PDF)
  • Multiple renderer implementations:
    • Reference CPU: Full path tracing on CPU with PPL parallelization
    • GPU Reference: GPU-accelerated path tracing using compute shaders
    • Preview: Fast preview renderer for editing
    • ISPC: Intel SPMD Program Compiler version (example only)
  • Multithreading: thread poll, PLL, none
  • Support for SIMD
  • DirectX 11 based display
  • Anti aliasing
  • No denoising
  • Starting code for the review: frame_renderer::render() and frame_renderer::ray_color()
• Renderer variables
  • Resolution
  • Work distribution: stripes, chunks
  • Rays per pixel, ray bounces
• Camera setup
  • Projections: Perspective/orthografic/blend
  • Focus distance
  • Aperture
  • Aspect ratio
• Specular, diffuse, emissive materials:
  • Metal: copper, gold, silver, steel
  • Dialectric: glass, sapphire, moissanite, diamond, water
  • Texture: solid, checker
  • Lambertian: basic colors
  • Diffuse light: a few strength types
• Primitives:
  • Sphere
  • XY rectangle
  • XZ rectangle
  • ZY rectangle

Third party dependencies

DirectX 11

ocornut/imgui v1.87

nlohmann/json v3.10.5

PIX for Windows v1.0.220124001

STB Image v2.27

Tiny obj v1.0.6

spdlog v1.x

ispc v1.19.0