simple-c-raytracer

This is a simplest possible raytracer written in C, intentionally brute force, with minimal usage of pointers and external libraries, for easy understanding of the basic theory. This was part of a workshop, Build a Raytracer, by DDU India at BITS-ATMOS Hyderabad 2012.

Build and Run

make
./raytracer.out

Scene Description

Scene can be set up in createScene() function in raytracer.c.
The function names are self explanatory.

Output Settings

Use the following #defines in raytracer.c for output settings:

#define FILENAME "output.ppm"
#define ISBINARY 1
#define WIDTH 160
#define HEIGHT 120
#define FOV 45.0f
#define RECURSION 2
#define CONE_DIVISIONS 32
#define CYLINDER_DIVISIONS 32
#define SPHERE_SUBDIVISIONS 3

Performance

1. Use a small image size (e.g. 160x120) for quicker results
2. Recursion Depth can reduced. 0 means no reflections and refractions
3. Use smaller number for primitive divisions (resolution)

Authors

Shiben Bhattacharjee
Naveen Kumar
Special mention of our dear friend for moral support: Yash Agrawal