Programming 2D Games

160 6. Collisions and Entities

sumRadiiSquared *= sumRadiiSquared; // Square it

// If corner and circle are colliding

if(distSquared.x + distSquared.y <= sumRadiiSquared)

{

// Set collision vector

collisionVector = *ent.getCenter() - corner;

return true;

}

return false;

}

Listing 6.10. e collideCornerCircle function is used when a circle is in the Voronoi region of

a box.

6.3 The Entity Class

e collision code we have been creating is part of the new Entity class. e Entity class

inherits from the Image class and adds the following:

• e ability to collide with other entities.

• Health property and related functions.

• Velocity and delta velocity ...