The Math Module contains helpful math functions, and the Vector and Vector3 classes.
The Math Module can be accessed with MDog.Math.method().
A Vector is a 2D point or direction with an x and a y. Make one with new MDog.Math.Vector(x, y).
Methods that change a vector change it in place, and return the same vector so they can be chained, like velocity.add(gravity).constrain(5). Use clone() first to keep the original.
The x and y can also be read and set directly.
A Vector3 is a 3D point or direction with an x, y, and z. It's mostly used by the ThreeDee Module. Make one with new MDog.Math.Vector3(x, y, z).
Just like Vector, methods change the vector in place and return it so they can be chained.