private void GameEnvironment_Collision(object sender, GameEnvironment.CollisionEventArgs e)
{
foreach (CollisionInformation collisionInformation in (from collisionInfo in e.CollisionInformation
where object.Equals(this.AssociatedObject, collisionInfo.CollidingElement)
select collisionInfo))
{
double vx = this.MovableBehavior.Velocity.X;
double vy = this.MovableBehavior.Velocity.Y;
Vector collisionNormal = collisionInformation.Normal;
// move the object out of the collision region
Point newPosition = new Point(this.MovableBehavior.X, this.MovableBehavior.Y);
if (collisionNormal.X < 0)
{
newPosition.X -= 2 * vx;
}
if (collisionNormal.Y < 0)
{
newPosition.Y -= 2 * vy;
}
this.MovableBehavior.SetPosition(newPosition);
// deflect the velocity around the normal of collision
double dot = vx * collisionNormal.X + vy * collisionNormal.Y;
vx -= (2 * dot * collisionNormal.X);
vy -= (2 * dot * collisionNormal.Y);
this.MovableBehavior.Velocity = new Vector(vx, vy);
this.Direction = Math.Atan2(vy, vx) * 180 / Math.PI;
}
}
private void OnGameEnvironmentCollision(object sender, GameEnvironment.CollisionEventArgs e)
{
if (e.CollisionInformation.Any(collisionInfo => object.ReferenceEquals(this.Source, collisionInfo.CollidingElement) || object.ReferenceEquals(this.Source, collisionInfo.HitElement)))
{
this.InvokeActions(EventArgs.Empty);
}
}