This is an implementation of a ray tracer from Ray Tracing in One Weekend as well as Accelerated Ray Tracing in One Weekend in CUDA
The two program creates a simple image of various size spheres.
Image Produced with Cuda
Image Produced with C++
The purpose of writing the two programs that output a similiar image is to show to the performance increase that using CUDA provides.
Profiling of Cuda program
Profiling of C++ program
As shown by the profiling, using Cuda's parallel processing platform allows for much faster rendering of the image.
Documentation for Cuda code is located here
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.
To run this code you need:
- C++ Compiler(I used g++)
- PPM viewer(I used gimp, also online viewer here http://paulcuth.me.uk/netpbm-viewer/)
- Download all files in the v1 folder
- Compile and run tracer.cpp with your C++ compiler
- Should produce a final2.ppm image
To create your own scene, you have to create a list of sphere objects.
hittable *list[5];
list[0] = new sphere(vec3(0,0,-1), 0.5, new lambertian(vec3(0.1, 0.2, 0.5)));
list[1] = new sphere(vec3(0,-100.5,-1), 100, new lambertian(vec3(0.8, 0.8, 0.0)));
list[2] = new sphere(vec3(1,0,-1), 0.5, new metal(vec3(0.8, 0.6, 0.2), 0.3));
list[3] = new sphere(vec3(-1,0,-1), 0.5, new dielectric(1.5));
list[4] = new sphere(vec3(-1,0,-1), -0.45, new dielectric(1.5));
hittable *world = new hittable_list(list,5);
This is a example of list of 5 spheres Notice to create a sphere object it takes 3 parameter
- Vector
- Radius
- Material
The vector defines the center location of the sphere, taking x,y,z coordinates
vec3(x,y,z)
The radius is a float the set the radius of the sphere
The material sets how the sphere should look, there are 3 types of materials
- Metals, which are reflective
- Lambertian, which are not reflective
- Dielectrics which act like glass