/// <summary>
/// Swaps the contents of one junction with another, moving as
/// appropriate.
/// </summary>
private void SwitchJunctionContents(
Junction oldJunction, Junction newJunction)
{
// Get our segment
Segment s = oldJunction.GetSegment(newJunction);
if (s == null)
{
throw new Exception(
"Cannot handle switching to non-continous segments");
}
PointF translate = s.ChildJunctionPoint;
// Get a list of mobiles, including the player, around the
// player.
JunctionManagerPreload oldPreload = preloadedJunctions[oldJunction];
JunctionManagerPreload newPreload = preloadedJunctions[newJunction];
if (oldPreload == null)
throw new Exception("oldPreload is null");
if (newPreload == null)
throw new Exception("newPreload is null");
IList<Mobile> list = oldPreload.Physics.GetMobiles(
State.Player.Point, Constants.OverlapConnectionDistance);
foreach (Mobile m in list)
{
// Kill them in the current engine
m.PhysicsBody.Lifetime.IsExpired = true;
oldPreload.Physics.Remove(m);
// Keep the old body and force the mobile to recreate
// it by getting the new one and then setting the
// internal state.
Body oldBody = m.PhysicsBody;
m.ClearPhysicsBody();
Body newBody = m.PhysicsBody;
newBody.State.Position.Linear.X =
oldBody.State.Position.Linear.X - translate.X;
newBody.State.Position.Linear.Y =
oldBody.State.Position.Linear.Y - translate.Y;
newBody.State.Position.Angular =
oldBody.State.Position.Angular;
newBody.State.Velocity.Linear.X =
oldBody.State.Velocity.Linear.X;
newBody.State.Velocity.Linear.Y =
oldBody.State.Velocity.Linear.Y;
newBody.State.Velocity.Angular =
oldBody.State.Velocity.Angular;
// Add it in the new engine
newPreload.Physics.Add(m);
}
}
