game101
Moving to Vector2D
We already had developed a fantastic PhysicEngine class, supporting some Newton’s laws, and we rely on the Entity
attributes (x,y), (dx,dy) and (ax, ay) for respectively position, velocity and acceleration, but also Material
attributes and the mass of this entity
We also used the World object as PhysicEngine world’s limited context with the play area, the gravity and a clear
identified Material to define physic attributes of the play area where the Entity will move on.
It is now time to use some Math to compute things with a Vector2D class.
The Vector2D
A Vector2D is math entity used to define a force on a 2D world. It basically contains 2 attributes: x and y.
This new class must be used to define our Entity position, velocity and acceleration :
public class Entity<T>{
public Vector2D position;
public Vector2D velocity;
public Vector2D acceleration;
}