public bool Conflicts(Movement other)
{
// if the objects are moving into eachother, cancel both
if (this.NewX () == other.NewX () && this.NewY () == other.NewY ())
return true;
// if the two objects swapped places, cancel both
if (this.NewX () == other.OldX () && other.NewX () == this.OldX ()
&& this.NewY () == other.OldY () && other.NewY () == this.OldY ())
return true;
return false;
}
public void StartMovement(Direction playerDirection)
{
// the player movement is special; if it fails, everything fails.
Movement playerMovement;
List<Movement> movements = new List<Movement> ();
foreach (Tile t in this.occupiedTiles) {
Movement m = new Movement (t.contains, t.x, t.y, t.contains.Move (playerDirection));
movements.Add (m);
if (m.ParentObject ().IsCharacter ())
playerMovement = m;
}
foreach (Movement m1 in movements) {
// if we already marked it invalid, skip
if (m1.Invalid ())
continue;
if (m1.NewX () < 0 || m1.NewX () >= this.width
|| m1.NewY () < 0 || m1.NewY () >= this.height) {
m1.SetInvalid ();
continue;
}
foreach (Movement m2 in movements) {
if (m1 == m2)
continue;
if (m1.Conflicts (m2)) {
m1.SetInvalid ();
m2.SetInvalid ();
break;
}
}
}
this.currentMovements = movements;
}