raytracer

Simple raytracer project for educational purposes written in C++ with Visual Studio 2012. Target system is Windows for now.

This software uses the FreeImage open source image library. See http://freeimage.sourceforge.net for details.
FreeImage is used under the GNU GPL, version 3.

Features

• Supports only Triangles (except .test scene files: these support Spheres)

• Illumination Model with

  • Reflection
  • Shadows

• Lights:

  • Point
  • Directional
  • Area (for soft shadows)

• Texture/Material support:

  • Ambient map
  • Diffuse map
  • Specular color map

• Supported Scene file types:

  • Everything Assimp can load
  • custom .test file type (see ./scenes/ for examples)
  • custom .raytrace file type
    • can embed other scene files
    • used for defining additional scene objects (camera, lights, output size, ...) for scene file types that can't specify these (e.g. .obj)

• Automatically defines a camera and Light if there isn't one present (looking/shining down Z-Axis)

  • Required for plain model files (.obj)

• Very simple spatial division speedup with regular grid inside the scenes AABB

• easy derivable IRenderTarget interface to support your own render target

  • default shipped implementation: PNGImage (with FreeImage library)

TODO

Write some build info.

• depends on Assimp (included)
• depends on FreeImage (included)

Features

• Unterstützung von

  • Specular Level Map (shininess)
  • Bump Map
  • Normal Map

• Anti-Aliasing

  • Mehrere Rays durch EINEN Pixel erzeugen und die Farben dieser Rays mitteln (Supersampling)
  • Diese Rays nur erzeugen wenn eine Kante im Spiel ist! (Sobel) (Edge detection)

Speedups

• Uniform Grid Traversal
  • Das Bounding Box Gitter nur dem Ray folgend durchgehen

Issues

• tricell.test -> AABB der Scene ist nicht richtig
  • Sphere Bounding Box nicht ganz ok! (...bezieht scale/rotate nicht mit ein)