Programming 2D Games

150 6. Collisions and Entities

and the other entity’s center. We will see how to use the collision vector later in this chapter

when we look at game physics.

//========================================================================

// Circular collision detection method

// Called by collision(), default collision detection method

// Post: returns true if collision, false otherwise

// sets collisionVector if collision

//========================================================================

bool Entity::collideCircle(Entity &ent, VECTOR2 &collisionVector)

{

// Difference between centers

distSquared = *getCenter() - *ent.getCenter();

distSquared.x = ...