Unity二维已知子物体世界坐标，求父物体世界坐标

// 根据激光器和本体中心的位置，已知激光器的坐标，求本体中心的坐标
float length = 0.4f;
float x = sensor.transform.position.x;
float y = sensor.transform.position.z;
float r = sensor.transform.eulerAngles.y;
Debug.Log("[" + x + "," + y + "]" + "," + r);
float angle = r * Mathf.PI / 180.0f;
// 根据子物体的世界坐标求父物体的世界坐标
x = x - Mathf.Sin(angle) * length;
int X = Convert.ToInt32(x * 1000);
y = y - Mathf.Cos(angle) * length;
int Y = Convert.ToInt32(y * 1000);