public void UpdatePieceMeshes(RectangleF region)
{
currentHeightMapVersion++;
int npiecesw = Pieces.GetLength(1);
int npiecesh = Pieces.GetLength(0);
region.X -= PieceSize.Width / 4 / Size.Width;
region.Y -= PieceSize.Height / 4 / Size.Height;
region.Width += PieceSize.Width / 2 / Size.Width;
region.Height += PieceSize.Height / 2 / Size.Height;
for (int y = (int)(region.Top * npiecesh); y <= (int)(region.Bottom * npiecesh) && y < Pieces.GetLength(0); y++)
{
for (int x = (int)(region.Left * npiecesw); x <= (int)(region.Right * npiecesw) && x < Pieces.GetLength(1); x++)
{
Pieces[y, x].UpdateMesh();
}
}
}
