Assignment 3 Camera Simulation

Doug Johnston

Date submitted: ?? May 2006

Code emailed: ?? May 2006

Compound Lens Simulator

Description of implementation approach and comments

I made an effort to take this one step at a time, so I wouldn't run into big problems with no idea what to fix.

My first step was to setup the rendering system, and make sure I get thr raster->camera and camera->world coordinate transformations correct. I tested this by setting the direction vector normal to the film plane (ie: (0,0,1) in camera coords.), and let everything run, which should produce a very small orthonormal projection. This is what I got:

attachment:orthoRays.png

which looks like it should. Its the very middle of the image, flipped upside down like a good film plane should be.

Next, I got the lens files reading in properly, and verified the output. I wrote a Ray-Sphere intersection routine, and tested it using only the back lens, with orthonormal rays, which produced the following output of interesections: [[br]]

attachment:lensintersect.png [[br]]

which looks pretty spherical lens-like. Next, I aimed the rays at the lensUV point after converting to a disk with concentricSampleDisk, and got what I expected:

attachment:lensintersectUV.png