fast_ray_tracer

I've tried to keep the yaml file scenes/template/template.yml up to date with all the global configuration parameters.

Example usage:

python3 yaml_parser/yaml_parser.py scenes/bounding_boxes/bounding_boxes.yml >./main.c
make
date
time ./ray_tracer
open /tmp/out_file.ppm
open /tmp/out_file.png

TODO

• Add a spot light
• Refactor photon mapping code in light.c to use CMJ instead of random sampling for photon emission
• Remove malloc/free from the photon map where possible.
• Implement participating media photon tracing/mapping.
• Implement MTL file parsing.
  • Support object emission (refactor entire lighting system)
  • Use a material's Tf triple to determine the casts_shadow flag. This includes changing the intensity_at function for each light type. This also requires changing the way the hit function works.
    • Investigate why shadow calc short-cut causes lighting problems. Sometimes t < 0 for the first hit found. Fixed.
  • bump maps.
  • Support illum directives I decided not to bother.
  • Support the obj file mtllib directive to determine a material file to import.
• Add parameters to the config parser
  • obj_loader default vertex num, default group num
  • super-sampling flag for textures
• Refactor patterns into multiple source files
• Implement triangle mesh support
• Finish adding HSL color support
• Implement projection map for generating the caustics photon map.
• Implement selective projection maps. Perhaps object opt-in.
• Genericize patterns so they don't use the Color type
• Add const keyword to function signatures where appropriate.
• Investigate BLAS/LAPACK/SIMD
• Add heirarchical yaml parsing so I can have a global config which is read first before a scene's yaml file.
• Refactor shapes such that one only needs to include shapes.h
• Add parameters to the config parser
  • epsilon
• Add a circular area light
• Add a flag to skip matrix multiplies by the identity matrix
• Implement a better shadow ray mechanism so intersection stops after the first hit
• Use realloc instead of malloc when resizing arrays for intersections and group.children
• Get rid of bounding box alloc'ing and free'ing.
• Rework container so it hangs off the world object.
• Fix canvas so it takes a color space function at construction. Right now maps are always converting to sRGB.
• Refactor materials out of shapes.{c,h}
• Refactor yaml parser logic to not load a file multiple times but use shape_copy on the parent group for object files.
• Refactor canvas/texture maps to only keep one image in memory even if multiple patterns try to load the file.
• Add parameters to the config parser
  • light source cache size
  • Add the ability to configure color space in a yaml config file
• Implement photon tracing
• Implement photon mapping for caustics
  • Balance radiance estimate
• Implement photon mapping for diffuse reflection
  • Balance radiance estimate
• Improve correlated multi-jitter logic
• Refactor sampling and jittering from camera, renderer, lights into src/libs/sampler/sampler.{c,h}
• Refactor core-selection code from renderer.c into a library
• Support a thread pool so rows can be handed out independently.
• Add GI parameters to the config parser.
  • photon map cone constant