Simple Python Ray Tracer with Source Code

Source Code: https://github.com/rafael-fuente/Python-Fast-Raytracer

Some of the features implemented are refraction, thin film interference, textures, camera lens, path tracing and animations.

This was a fun project made in my spare time. It uses python numpy arrays and functions which are written in C and are multithreaded to render the images in a reasonable amount of time.

The animation was done rendering frame by frame. Each frame take a few seconds to render in a fast computer.

Every question, critic, improvement about the source code is welcome and grateful!

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How I made the soap bubbles:

The bubbles colors were computed with the exact solution to Fresnel equations with infinite bounces on a thin film layer for any angle of incidence. (see thin film interference, Optics, Eugene Hecht, Chpt. 9.)

Then I mapped it with a white light spectrum, (Illuminant D65 spectrum) with different film thickness and refraction indexes and converted the resulting spectrum to RGB colors using CIE Color matching functions . The final image (reflectance map) was this:

https://github.com/rafael-fuente/Python-Raytracer/blob/master/sightpy/textures/thin_film_interference_n%3D1.4.png

The horizontal axis is the film thickness from 0 to 400 nm. The vertical axis is the incident angle from 0 to 90 degrees.