RT

A 3d raytracing program (42 team project)

Exported BMP image of render by Monte-Carlo path tracing with a ray-per-pixel amount of 1024 and a depth of 24

Below are the features (current features are marked with '•' and projected features are marked with '-'):

Building

Run make.

• Linux:

  • If you get a compilation error of the kind #include <CL/cl.h> not found, check that opencl-c-headers are installed on your machine.
  • If you get a linking error of the kind cannot find -lSDL2: No such file or directory, check that libsdl2-dev is installed on your machine
  • If you get a linking error of the kind cannot find -lOpenCL: No such file or directory, check that ocl-icd-opencl-dev is installed on your machine.
  • If you get a an "OpenCL error -1001", you probably have an NVIDIA graphics card, and there's probably an issue with how your GPU drivers are configured. Follow the guide here, but download the driver that's actually recommended for your platform (as of writing this, it was nvidia-driver-550-server-open for mine).

• Mac OS: [TODO]

• Windows: [TODO]

Features:

• Cross-platform (windows, mac, linux), using SDL2 and OpenCL
• Realtime (no unnecessary renders done, 60 fps - of course, this also depends on the quality of render currently set, and your GPU)
• OpenCL GPU acceleration, to lessen the usual lag of a raytracer (and maybe scale2x or hq2x if needed)
• Various render modes, for debug (normal map, bbox, etc) or quality.
• Fully controllable camera, with all 3 clicks and/or arrow keys
• A configuration file to store properties between program executions
• UI pane allowing the user to modify any of the camera's properties
• UI pane allowing the user to modify any of the scene's properties
• UI list of objects within the scene with property expanding and scrollbar controls
• I/O functions accessible through the UI for file opening/importing and saving
• A random RT file generator
• [TODO] Clipboard copy/pasting of data within the program
• [TODO] Selecting objects on click, and moving/rot/scaling them with keys
• [TODO] Skybox (currently background colors, or textured giant primitives can be used to this effect)

Light Features:

• Primitive-shaped lights
• Monte-Carlo path-tracing
• Reflection (mirror surfaces)
• Refraction (transparent surfaces)
• fresnel reflections (glassy surface highlighting)
• [TODO] Bi-directional path-tracing
• [TODO] caustic lights (refractions on shadows)
• [TODO] Black holes (ray curving)

Primitives & Shapes:

• Plane (infinite, and finite rectangle and disk)
• Triangle
• Cube
• Sphere
• Cylinder (infinite, and finite)
• Cone (infinite and finite)
• Saddle
• Paraboloid
• Hyperboloid
• [TODO] OBJ triangular mesh models (intersecting rays in world space)
• [TODO] Mobius twist
• [TODO] Torus knot
• [TODO] 3D Epitrochoid/Hypocycloid
• [TODO] Fractals
• [TODO] Unions, intersections, and their negative counterparts

Structure

• [TODO] fix to go beyond the dumb structural requirements of 42