//选择改变颜色的片
public void selectPiece(Vector3 pos)
{
Ray ray = Camera.main.ScreenPointToRay(pos);
RaycastHit hit;
if (Physics.Raycast(ray, out hit) && hit.collider.gameObject.tag == "Piece" && is_slt_color)
{
PieceFactory pf = Singleton <PieceFactory> .Instance;
used_step += pf.SetPieceColor(hit.collider.gameObject, slt_color);
if (pf.isOneColor())
{
if (used_step > max_step)
{
maintext.text = "Pass But Overstep";
}
else
{
maintext.text = "Perfect!";
}
}
}
}