Pyrit Ray Tracer

Current Features

• C++ API and Python binding
• shapes: triangle, sphere, box
• spatial subdivision algorithms: octree, kd-tree
• packet tracing (trace packets of four rays, using SSE instruction set)
• reflection, refraction, sharp shadows
• Phong lighting model
• ambient occlusion

• oversampling (4×, 9×, 16× grid)

• subsampling (basic, color based)

• example readers of various formats: Stanford .ply, Wavefront .obj, LightWave .lwo and SPD's .nff

Planned Features

• adaptive and stochastic (non-grid) sampling

• absorption of rays in material (Beer-Lambert law)

Demos

The package contains several demos both in Python and C++. Each Python demo renders a scene and saves resulting picture into PNG file. Some demos need models from Stanford Scanning Repository which can be automatically downloaded by scons download-models. All C++ demos require SDL for interactive browsing of scenes.

Download

• Source

  • Browse source repository

  • bzr branch http://bzr.devl.cz/pyrit

  • latest snapshot.

• Win32 demos (MSVC9.0)

  • with SSE: ZIP | 7-zip

  • no SSE: ZIP | 7-zip

• Doxygen documentation: online

How to build

Build is done by SCons. Other dependencies are SDL and libpng for C++ demos, Python for Python module and demos, tar and wget for model files auto-downloading.

• scons no-docs builds everything but docs and also downloads models needed by some of the demos

• scons no-download or just scons does not download models

• scons all builds everything including docs (needs Doxygen)

• scons -h shows all targets

• scons -c cleans build directory

Podrobný postup pro Windows

Pictures

	car model demos/car.py
	glass bunny with shadows and reflection bunny model with ~70k triangles demos/bunny.py
	row of glass spheres demos/spheres_glass.py
	spheres with false soft shadows (ambient occlusion) demos/spheres_ao.py
	textures demo (planar, cubic, cylindrical and spherical mapping) ccdemos/textures.cc

License

This software is published under terms of MIT license