/// <summary>
/// Given the specified coordinate in local / object space, this method returns the
/// tile index that is located there.
/// </summary>
/// <param name="localPos"></param>
/// <param name="pickMode">Specifies the desired behavior when attempting to get a tile outside the rendered area.</param>
/// <returns></returns>
public Point2 GetTileAtLocalPos(Vector2 localPos, TilePickMode pickMode)
{
// Early-out, if the specified local position is not within the tilemap rect
Rect localRect = this.LocalTilemapRect;
if (pickMode == TilePickMode.Reject && !localRect.Contains(localPos))
{
return(new Point2(-1, -1));
}
Tilemap tilemap = this.ActiveTilemap;
Tileset tileset = tilemap != null ? tilemap.Tileset.Res : null;
Point2 tileCount = tilemap != null ? tilemap.Size : Point2.Zero;
Vector2 tileSize = tileset != null ? tileset.TileSize : Tileset.DefaultTileSize;
// Determine the tile index at the specified local position
Point2 tileIndex = new Point2(
(int)MathF.Floor((localPos.X - localRect.X) / tileSize.X),
(int)MathF.Floor((localPos.Y - localRect.Y) / tileSize.Y));
// Clamp or reject the tile index when required
if (pickMode != TilePickMode.Free)
{
if (tileCount.X <= 0 || tileCount.Y <= 0)
{
return(new Point2(-1, -1));
}
tileIndex = new Point2(
MathF.Clamp(tileIndex.X, 0, tileCount.X - 1),
MathF.Clamp(tileIndex.Y, 0, tileCount.Y - 1));
}
return(tileIndex);
}
/// <summary>
/// Given the specified coordinate in local / object space, this method returns the
/// tile index that is located there.
/// </summary>
/// <param name="localPos"></param>
/// <param name="pickMode">Specifies the desired behavior when attempting to get a tile outside the rendered area.</param>
/// <returns></returns>
public Point2 GetTileAtLocalPos(Vector2 localPos, TilePickMode pickMode)
{
// Early-out, if the specified local position is not within the tilemap rect
Rect localRect = this.LocalTilemapRect;
if (pickMode == TilePickMode.Reject && !localRect.Contains(localPos))
return new Point2(-1, -1);
Tilemap tilemap = this.ActiveTilemap;
Tileset tileset = tilemap != null ? tilemap.Tileset.Res : null;
Point2 tileCount = tilemap != null ? tilemap.Size : Point2.Zero;
Vector2 tileSize = tileset != null ? tileset.TileSize : Tileset.DefaultTileSize;
// Determine the tile index at the specified local position
Point2 tileIndex = new Point2(
(int)MathF.Floor((localPos.X - localRect.X) / tileSize.X),
(int)MathF.Floor((localPos.Y - localRect.Y) / tileSize.Y));
// Clamp or reject the tile index when required
if (pickMode != TilePickMode.Free)
{
if (tileCount.X <= 0 || tileCount.Y <= 0)
return new Point2(-1, -1);
tileIndex = new Point2(
MathF.Clamp(tileIndex.X, 0, tileCount.X - 1),
MathF.Clamp(tileIndex.Y, 0, tileCount.Y - 1));
}
return tileIndex;
}
private Point2 GetTileAtLocalPos(ICmpTilemapRenderer renderer, Point localPos, TilePickMode pickMode)
{
Component component = renderer as Component;
Transform transform = component.GameObj.Transform;
// Determine where the cursor is hovering in various coordinate systems
Vector3 worldCursorPos = this.CameraComponent.GetSpaceCoord(new Vector3(localPos.X, localPos.Y, transform.Pos.Z));
Vector2 localCursorPos = transform.GetLocalPoint(worldCursorPos.Xy);
// Determine tile coordinates of the cursor
return renderer.GetTileAtLocalPos(localCursorPos, pickMode);
}
