如何在unity中實現拖尾效果

在制作游戲過程中會出現鼠標滑動的實現，而為啦增強視覺效果，往往會添加拖尾或者鼠標點擊的特效，接下來就說說在unity中如何實現拖尾效果，首先unity中有個組件，叫TrailRenderer,在Component ——> Effect——>TrailRenderer中添加，根據自己需要的效果設置自己需要的顏色，然后還有相應的曲線和拖尾長度，來實現自己需要的效果，接下來上代碼

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里面用來實時定位鼠標按下去的坐標