public MapCollisionType MoveContactMap(ref Vector2 position, Vector2 vector, Rectangle rectangle, Map map)
{
// TODO: Optimize this method.
if (vector.X != 0 && vector.Y != 0)
{
return(MoveContactMap(ref position, vector * Vector2.UnitY, rectangle, map) |
MoveContactMap(ref position, vector * Vector2.UnitX, rectangle, map));
}
Rectangle prevRect = GetAbsoluteAABB(position, rectangle);
Rectangle nextRect = GetAbsoluteAABB(position + vector, rectangle);
MapCollisionType collisionType = MapCollisionType.None;
position += vector;
foreach (TileData tileData in map.GetTilesInRegion(new Rectangle(nextRect.X, nextRect.Y, nextRect.Width - 1, nextRect.Height - 1)))
{
Tile tile = map.SourceTiles[tileData.SourceID];
Rectangle cellRect = tileData.Target;
/*
* This must be done because TileData.Target always returns a
* rectangle with the center coordinates of the tile, instead
* of the top left corner.
*/
cellRect.Offset(-cellRect.Width / 2, -cellRect.Height / 2);
if (vector.X != 0)
{
if ((bool)tile.Properties["left"].AsBoolean && prevRect.Right <= cellRect.Left && nextRect.Right > cellRect.Left)
{
position.X = cellRect.Left - rectangle.Width + rectangle.X;
collisionType |= MapCollisionType.Right;
}
else if ((bool)tile.Properties["right"].AsBoolean && prevRect.Left >= cellRect.Right && nextRect.Left < cellRect.Right)
{
position.X = cellRect.Right + rectangle.X;
collisionType |= MapCollisionType.Left;
}
}
if (vector.Y != 0)
{
if ((bool)tile.Properties["top"].AsBoolean && prevRect.Bottom <= cellRect.Top && nextRect.Bottom > cellRect.Top)
{
position.Y = cellRect.Top - rectangle.Height + rectangle.Y;
collisionType |= MapCollisionType.Down;
}
else if ((bool)tile.Properties["bottom"].AsBoolean && prevRect.Top >= cellRect.Bottom && nextRect.Top < cellRect.Bottom)
{
position.Y = cellRect.Bottom + rectangle.Y;
collisionType |= MapCollisionType.Up;
}
}
}
return(collisionType);
}
public override void Process(Entity entity)
{
PositionComponent position = entity.GetComponent <PositionComponent>();
SpeedComponent speed = entity.GetComponent <SpeedComponent>();
AABBComponent aabb = entity.GetComponent <AABBComponent>();
Vector2 new_position = speed.PreviousPosition;
MapCollisionType type = MoveContactMap(
ref new_position,
position.Position - speed.PreviousPosition,
aabb.Rectangle,
EntitySystem.BlackBoard.GetEntry <Map>("Map"));
position.Position = new_position;
EventSenderComponent eventSender = entity.GetComponent <EventSenderComponent>();
if (eventSender != null)
{
eventSender.Trigger <MapCollisionEventType>(entity, new MapCollisionEventType(type));
}
}
public MapCollisionEventType(MapCollisionType type)
{
this.type = type;
}
