TianJin_23/Assets/SetFireDire.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 设置泄漏点朝向
/// </summary>
public class SetFireDire : MonoBehaviour {

    public void SetDirec(RaycastHit hit)
    {
        SetFireYScale( hit);
        StartCoroutine(delay(hit));
    }

    IEnumerator delay(RaycastHit hit)
    {
        yield return new WaitForEndOfFrame();
        Transform transCenter = hit.collider.transform.Find("Center");
        if (transCenter==null)
        {
            GameObject obj = new GameObject("Center");
            obj.transform.SetParent(hit.collider.transform);
            obj.transform.localEulerAngles = Vector3.zero;
            obj.transform.localPosition = Vector3.zero;
            transCenter = obj.transform;
        }
        Vector3 vec1, vec2;
        vec1 = hit.point- new Vector3(transCenter.position.x,hit.point.y,transCenter.position.z);
        vec2 =transform.forward;
        vec1 = vec1.normalized;
        float fangxiang = (Vector3.Cross(vec2, vec1).y > 0 ? 1 : -1);
        float jiaJiao = Vector3.Angle(vec2, vec1);
        if (name.Contains("guanTiFire"))
        {
            transform.eulerAngles = new Vector3(0, /*180 - */jiaJiao * fangxiang-180, 0);
          //  transform.localPosition += new Vector3(0, 4, (-1f * fangxiang));
        }
        else {
            transform.eulerAngles = new Vector3(0, jiaJiao * fangxiang, 0);
        }
    }


    ///// <summary>
    ///// 设置Y轴缩放，使火焰可以流到地面
    ///// </summary>
    void SetFireYScale(RaycastHit hitGuanTi)
    {   // 设置Y轴长度，是它能流掉地面
        if (name.Contains("guanTiFire"))
        {
            Transform ranyou = transform.Find("ranyou");
            float particleLength = /*(ranyou.position.y * .9f - transform.position.y)*/ transform.Find("Oil").GetComponent<MeshFilter>().sharedMesh.bounds.size.z * 2;
            Ray ray = new Ray(ranyou.position, -transform.up);
            RaycastHit hitinfo;
            if (Physics.Raycast(ray, out hitinfo, 100, LayerMask.GetMask("dimian")))
            {//碰到地面层
                float length = -hitinfo.collider.transform.position.y + ranyou.position.y;
                float scale1 = length / particleLength;//燃油粒子高度/粒子整体高度，得到一个缩放比

                transform.localScale *= (scale1 * scale1);
              //  Debug.Log("油罐高度：" + hitGuanTi.collider.bounds.size.y + "   粒子现在的长度：" + (ranyou.position.y-hitinfo.collider.transform.position.y) );

                //TODO 如果缩放过高，会使燃油的高度超出油罐的高度，此时需要调整
                ResetParticlePos(ranyou.position.y - hitinfo.collider.transform.position.y, hitGuanTi.collider.bounds.size.y, hitinfo);

                Transform transRanyou = transform.Find("RanYou");
                transRanyou.position = new Vector3(transRanyou.position.x, hitinfo.point.y + .15f, transRanyou.position.z);

            }

        }
    }


    void ResetParticlePos(float particleLength,float oilTankHeight,RaycastHit hitGround)
    {
        //当缩放完成后，如果粒子的最高点高于油罐高度，则需要对粒子高度进行重新的调整
        if (particleLength<oilTankHeight*0.8f)
        {
            return;
        }
        Debug.Log("transform.position:" + transform.position + "   " + (-oilTankHeight * .9f + hitGround.collider.bounds.size.y));
        Debug.Log("transform.localposition:" + transform.localPosition);
        transform.position = new Vector3(transform.localPosition.x,(-oilTankHeight * .9f + hitGround.collider.bounds.size.y)  , transform.localPosition.z);
        transform.localScale = new Vector3(transform.localScale.x,2f,transform.localScale.z);
        transform.Find("text").localScale /= transform.localScale.x*1.1f;

    }
}