Return to Ray Tracing Assignment Overview
 

It's surprising how after the basic renderer framework is built up how easy it is to add interesting features with littel effort.  I remember in my OpenGL class it took me weeks to implement shadows (and I never did get them to work properly).  Here, I've added support for triangles, lighting of Lambertian (total diffuse) surfaces, shadows, and viewing to the basic ray tracer of assignment 1.  Viewing is accomplished through program command line arguments: eye point, look-at point, up vector, and field of view.  

Added Triangles, Lighting, and Shadows to Image from Asgt 1
400x400 JPEG converted from 500x500 PPM output

The following input file was used to generate all images on this page:

light -1.0 0.25 0.0 1 1 1
triangle -2.25 0.50 -6.00 0.00 -1.00 -4.00 0.00 2.00 -4.50 0.48 0.30 0.16
triangle 0.00 -2.00 -5.00 1.50 -1.00 -3.00 1.00 0.00 -10.00 0.78 0.63 0.35
sphere -0.5 -0.9 -2.0 0.8 0.53 0.68 0.48
sphere 6.0 10.0 -50.0 20.0 0.99 0.85 0.031
sphere -1.0 0.0 -5.0 1.0 0.06 0.21 0.23
sphere 0.0 0.0 -6.0 1.0 0.41 0.14 0.00
sphere 1.0 0.0 -7.0 1.0 0.15 0.30 0.37
sphere 2.0 0.0 -8.0 1.0 0.70 0.69 0.55
 

Translated to the Right
400x400 JPEG converted from 500x500 PPM output
Eye: (2, 0, 2); At: (0, 0, -5), FOV: 45
 

View from Above
400x400 JPEG converted from 500x500 PPM output
Eye: (2, 3, 2); At: (0, 0, -10), FOV: 45
 

View from Below
400x400 JPEG converted from 500x500 PPM output
Eye: (-5, -15, 10); At: (0, 0, -5), FOV: 45
 

Wide Angle Lens
400x400 JPEG converted from 500x500 PPM output
Eye: (0, 0, 0.5); At: (0, 0, -5), FOV: 90