unity 计算两点的的角度

unity 计算两点的的角度

  float angle_360(Vector3 from_, Vector3 to_)
        {
            //两点的x、y值
            float x = from_.x - to_.x;
            float y = from_.y - to_.y;

            //斜边长度
            float hypotenuse = Mathf.Sqrt(Mathf.Pow(x,2f)+Mathf.Pow(y,2f));

            //求出弧度
            float cos = x / hypotenuse;
            float radian = Mathf.Acos(cos);

            //用弧度算出角度    
            float angle = 180 / (Mathf.PI / radian);
          
            if (y < 0)
            {
                angle = -angle;
            }
            else if ((y == 0) && (x < 0))
            {
                angle = 180;
            }
            return angle;
        }

Vector3 targetDir = targetPos.position - transform.position; // 目标坐标与当前坐标差的向量

Vector3.Angle(transform.forward,targetDir) // 返回当前坐标与目标坐标的角度