/// <summary>
/// 是否和小方块有碰撞
/// </summary>
/// <param name="origin">方块左下角</param>
/// <param name="offset"></param>
/// <param name="camera"></param>
/// <returns></returns>
private bool HitQuad(Vector3 origin, Vector3 dir0, Vector3 dir1, Camera camera)
{
Vector3 pos1 = origin + dir0;
Vector3 pos2 = origin + dir0 + dir1;
Vector3 pos3 = origin + dir1;
Vector2 mousePos = Input.mousePosition;
Vector2 screenOrigin = camera.WorldToScreenPoint(origin);
Vector2 screenPos1 = camera.WorldToScreenPoint(pos1);
Vector2 screenPos2 = camera.WorldToScreenPoint(pos2);
Vector2 screenPos3 = camera.WorldToScreenPoint(pos3);
//PhysicsMath.IsPointInsidePolygon
//if (mousePos.x > Mathf.Max(screenOrigin.x, screenOffset.x) ||
// mousePos.x < Mathf.Min(screenOrigin.x, screenOffset.x) ||
// mousePos.y > Mathf.Max(screenOrigin.y, screenOffset.y) ||
// mousePos.y < Mathf.Min(screenOrigin.y, screenOffset.y))
// return false;
//else
// return true;
return(Math2d.IsPointInsidePolygon(mousePos, new Vector2[] { screenOrigin, screenPos1, screenPos2, screenPos3 }));
}
