Let’s walk through src/main.c – a clean raytracer using raylib.

Check the project’s source code at Github

The materials#

  • SphereMaterial: Holds Color, specular (0-1), shininess.
  • Sphere: Material + Vector3 position + float radius.

Render Loop#

Per frame, recompute all pixels (brute-force, no acceleration):

  1. Ray Generation: For each x,y, GetScreenToWorldRay shoots ray from camera through pixels.

  2. Intersection:

    • Init nearest collision distance to FLT_MAX.
    • For each sphere: GetRayCollisionSphere(ray, pos, radius).
    • Track closest hit + sphere.

  3. Miss: BLACK pixel.

Build & Run#

cmake -B build
cmake --build build
./build/Raytracer