2D Grid-Based Collisions

Grid-Based Collisions provides a system for colliding rectangular objects with a set of static objects that lay in a grid in 2D. It does this by only sampling the direct environment of the dynamic object for collisions, significantly reducing the amount of collision calculations done per frame when there are a lot of collidable objects in the grid. Grid-Based Collisions is most efficient over other collision engines when one or more dynamic objects are moving through a huge grid with many collidable tiles.
What do you get?
A simple but rigid collision system, solely for efficiently and flawlessly colliding rectangles with a 2D grid.