/// <summary>
/// Expands the AABB for this grid when a new tile is added. If the tile is already inside the existing AABB,
/// nothing happens. If it is outside, the AABB is expanded to fit the new tile.
/// </summary>
/// <param name="gridTile">The new tile to check.</param>
public void UpdateAABB(Indices gridTile)
{
var worldPos = GridTileToLocal(gridTile).ToWorld();
if (AABBWorld.Contains(worldPos.Position))
{
return;
}
// rect union
var a = AABBWorld;
var b = worldPos;
var x = Math.Min(a.Left, b.X);
var width = Math.Max(a.Left + a.Width, b.X);
var y = Math.Min(a.Top, b.Y);
var height = Math.Max(a.Top + a.Height, b.Y);
AABBWorld = new Box2(x, y, width - x, height - y);
}
/// <summary>
/// Expands the AABB for this grid when a new tile is added. If the tile is already inside the existing AABB,
/// nothing happens. If it is outside, the AABB is expanded to fit the new tile.
/// </summary>
/// <param name="gridTile">The new tile to check.</param>
public void UpdateAABB(MapIndices gridTile)
{
var worldPos = GridTileToLocal(gridTile).ToWorld();
if (AABBWorld.Contains(worldPos.Position))
{
return;
}
// rect union
var a = AABBWorld;
var b = worldPos;
var min_x = Math.Min(a.Left, b.X);
var max_x = Math.Max(a.Right, b.X);
var min_y = Math.Min(a.Bottom, b.Y);
var max_y = Math.Max(a.Top, b.Y);
AABBWorld = Box2.FromDimensions(min_x, min_y, max_x - min_x, max_y - min_y);
}