/// <summary>
/// Checking whether an actor is within bounds for culling purposes.
/// </summary>
public bool isInBounds(Actor a)
{
if (view.Contains(a.getBufferedRectangleBounds(0)))
return true;
return false;
}
private bool isOffScreen(Actor a)
{
Rectangle aBounds = a.getBufferedRectangleBounds(0);
return !camera.View.Contains(aBounds) &&
!camera.View.Intersects(aBounds);
}
private void keepInBounds(Actor a)
{
Rectangle aBounds = a.getBufferedRectangleBounds(0);
if (!gameplayBoundaries.Contains(aBounds))
{
// 1.) determine the wall(s) with which we are colliding
// 3.) ensure position within bounds
// 2.) zero velocity and acceleration along those axes
if (aBounds.Left < gameplayBoundaries.Left)
{
a.move((float)Math.Abs(gameplayBoundaries.Left - aBounds.Left) + EPSILON, 0.0f);
if (a.velocity.X < 0.0f)
a.velocity.X = 0.0f;
//if (a.acceleration.X < 0.0f)
// a.acceleration.X = 0.0f;
a.acceleration.X = -(a.acceleration.X);
}
if (aBounds.Right > gameplayBoundaries.Right)
{
a.move(-((float)Math.Abs(gameplayBoundaries.Right - aBounds.Right) + EPSILON), 0.0f);
if (a.velocity.X > 0.0f)
a.velocity.X = 0.0f;
//if (a.acceleration.X > 0.0f)
// a.acceleration.X = 0.0f;
a.acceleration.X = -(a.acceleration.X);
}
if (aBounds.Top < gameplayBoundaries.Top)
{
a.move(0.0f, (float)Math.Abs(gameplayBoundaries.Top - aBounds.Top) + EPSILON);
if (a.velocity.Y < 0.0f)
a.velocity.Y = 0.0f;
//if (a.acceleration.Y < 0.0f)
// a.acceleration.Y = 0.0f;
a.acceleration.Y = -(a.acceleration.Y);
}
if (aBounds.Bottom > gameplayBoundaries.Bottom)
{
a.move(0.0f, -((float)Math.Abs(gameplayBoundaries.Bottom - aBounds.Bottom) + EPSILON));
if (a.velocity.Y > 0.0f)
a.velocity.Y = 0.0f;
//if (a.acceleration.Y > 0.0f)
// a.acceleration.Y = 0.0f;
a.acceleration.Y = -(a.acceleration.Y);
}
}
}
private void wrapAround(Actor a)
{
Rectangle aBounds = a.getBufferedRectangleBounds(0);
if (!gameplayBoundaries.Contains(aBounds))
{
// 1.) determine the wall(s) with which we are colliding
// 2.) if we are completely outside on that wall, then
// reflect to the other side of the stage.
// off the right side
if (aBounds.Left >= gameplayBoundaries.Right)
{
a.move(-(float)(gameplayBoundaries.Width + (aBounds.Left - gameplayBoundaries.Right)),
0.0f);
}
// off the left side
if (aBounds.Right <= gameplayBoundaries.Left)
{
a.move((float)(gameplayBoundaries.Width + (gameplayBoundaries.Left - aBounds.Right)),
0.0f);
}
// off the bottom side
if (aBounds.Top >= gameplayBoundaries.Bottom)
{
a.move(0.0f,
-(float)((aBounds.Top - gameplayBoundaries.Bottom) + gameplayBoundaries.Height));
}
// off the top side
if (aBounds.Bottom <= gameplayBoundaries.Top)
{
a.move(0.0f,
(float)((gameplayBoundaries.Top - aBounds.Bottom) + gameplayBoundaries.Height));
}
}
}