Libraries used: SDL2.h (version 2.32.0, download here: https://www.libsdl.org/release/), math.h
I draw all the rays from the light source and compute their paths, it they encounter an obstacle or exit from the screen, their path stops.
This way, obstacles shadows are cast.
Each ray is defined as a struct composed of a 2D Starting Point and an angle expressed in radiants.
Circle light sources emit rays in every direction.
Since rays are manually placed and drawn, they are finite in number so this is obviously an approximation.
By moving the mouse around and pressing the right button, you can move the light source(s) and the emitted rays will change.
