pathtracer.h

#pragma once

extern const char* USAGE;
const char* USAGE =
    R"(Usage: pathtracer <filename> [options]

Options:
  -w --width=<px>                   Width of the image [default: 640].
  -a --aspect=<num>                 Aspect ratio of the image. If the model has
                                    specified the aspect ratio, it will be used
                                    [default: 1].
  --background=<3x float>           Background color [default: 0 0 0].
  -t --threads=<int>                Number of threads [default: 1].
  --inverse-gamma=<float>           Inverse of gamma for gamma correction
                                    [default: 0.454545].
  --no-gamma-correction             Disables gamma correction.
  --exposure=<float>                Exposure [default: 1].
  -v --verbose                      Verbose output.

Pathtracer options:
  -d --max-depth=<int>              Maximum recursion depth for raytracing
                                    [default: 3].
  -p --pixel-samples=<int>          Number of samples per pixel [default: 1].
  -m --monte-carlo-samples=<int>    Monto Carlo samples per ray [default: 8].
)";