Modified Monte Carlo Ray-tracing Method to generate the VLC channel impulse reponse of a indoor environment

Algorithm is based on:

Lo, Francisco J., and Rafael Pe. "Ray-tracing algorithms for fast calculation of the channel impulse response
on diffuse IR wireless indoor channels." Optical engineering 39.10 (2000): 2775-2780.

Reference paper:

Chowdhury, M. I., Weizhi Zhang, and Mohsen Kavehrad. "Combined Deterministic and Modified Monte Carlo  Method for Calculating Impulse Responses of Indoor Optical Wireless Channels." Journal of Lightwave Technology 32.18 (2014): 3132-3148.