如何在unity中实现拖尾效果

在制作游戏过程中会出现鼠标滑动的实现，而为啦增强视觉效果，往往会添加拖尾或者鼠标点击的特效，接下来就说说在unity中如何实现拖尾效果，首先unity中有个组件，叫TrailRenderer,在Component ——> Effect——>TrailRenderer中添加，根据自己需要的效果设置自己需要的颜色，然后还有相应的曲线和拖尾长度，来实现自己需要的效果，接下来上代码

public TrailRenderer m_CollectTrail = null;


#if UNITY_EDITOR
        if (Input.GetMouseButtonDown(0))
        {
            if (!m_PointDown)
            {
                m_PointDown = true;
                m_CollectTrail.Clear();
                m_CollectTrail.gameObject.SetActive(true);
            }
        }
        else if (Input.GetMouseButtonUp(0))
        {
            if (m_PointDown)
            {
                m_PointDown = false;
                m_CollectTrail.gameObject.SetActive(false);
            }
        }
#else
        if (Input.touchCount > 0)
        {
            if (!m_CollectTrail.gameObject.activeSelf)
            {
                m_CollectTrail.Clear();
                m_CollectTrail.gameObject.SetActive(true);
            }
        }
        else
        {
            if (m_CollectTrail.gameObject.activeSelf)
            {
                m_CollectTrail.gameObject.SetActive(false);
            }
        }
#endif

        // Update trail position.
        if (m_CollectTrail.gameObject.activeSelf)
        {
            var screenPos = (Application.isMobilePlatform && (Input.touchCount > 0)) ? (Vector3)(Input.GetTouch(0).position) : Input.mousePosition;
            var worldPos = Camera.main.ScreenToWorldPoint(screenPos);
            worldPos.z = 0.0f;
            m_CollectTrail.transform.position = worldPos;
        }
    }

放在Undate里面用来实时定位鼠标按下去的坐标