Ray Tracer

A simple bare-metal ray tracer written in C++.

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Useful Commands

Build with CMake

To build the project in release mode, run:

cmake --build build --config release

Generate PPM Image

After building, run the binary to generate a PPM image:

./{binary_name} > image.ppm

Replace {binary_name} with the actual name of your compiled binary.

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Glossary

• viewport: Rectangular area on a display device where a 2D/3D scene is rendered and displayed.
• camera: Point where all rays originate (also called "eye").
• ray: Line with an origin and direction.
• aspect ratio: Ratio of width to height of the image (e.g., 16:9).
• pixel spacing: Determines how far apart the pixels are in 3D space.
• camera origin: Point where all rays start (typically (0, 0, 0)).

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Math Reference

• r: Radius of the sphere.
• C: Coordinates of the center of the sphere (vector C: (Cx, Cy, Cz)).
• |v|: Magnitude or length of the vector.
  |v| = √(x² + y² + z²)

Key concepts

• Hittable = things you can hit (spheres, planes)
• HitRecord = result data from a hit
• HittableList = collection of Hittable objects