2D light raymarcher.
o<filename> Opens the room .json file
r Reloads open file
q Exits
p<amount> Simulates an amount of photons
*<number> Sets the number of pixels per room unit. Must be greather than zero.
m<multiplier> Sets the intensity multiplier. Must be greather than zero. Execute without arguments to get current value.
c<path> Sets the current working directory. Execute without arguments to get current value.
s<path> Saves the image to a png file. Path must include .png
explorer Opens the cwd in explorer
