Unity遮挡透明渐变
发表于2018-08-13
开发游戏过程中，出现角色被场景中的建筑物遮挡的情况该怎么办？下面就给大家介绍下遮挡后使用透明渐变的处理方法。
遮挡透明若没有渐变实现方法：
- 透明中物体存在list中
- 每过一段时间（可以每帧，但是流畅性会降低）摄像机发送一条射线向玩家，out hitInfo
- list与hitInfo比对，将在list中但是没有在hitInfo中的物体转变成不透明，list.remove；将在hitInfo中但是没有在list中转变成透明，list.add
若有渐变，实现比较麻烦一点，物体有两个状态：转变成透明过程中、转变成不透明过程中，添加两个list（InTransparent，outTransparent）对应两种状态，那么维护两个list即可：
1、未遮挡->遮挡，查看outTransparent，如果有该物体，从outTransparent移入InTransparent，outTransparent remove；如果没有添加新的加入InTransparent
2、遮挡->未遮挡，查看InTransparent，如果有该物体，从InTransparent移入outTransparent，InTransparent remove；如果没有添加新的加入outTransparent
摄像机CameraFollow.cs：
public class CameraFollow : MonoBehaviour
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public static CameraFollow instance;
public Transform Player;
public List<CameraMaskInfo> Mask;
public List<CameraMaskInfo> InTransparentList;
public List<CameraMaskInfo> OutTransparentList;
RaycastHit[] hitInfo;
void Awake()
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instance = this;
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void Start()
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StartCoroutine(IEMask());
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public void ClearMask()
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Mask.Clear();
InTransparentList.Clear();
OutTransparentList.Clear();
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IEnumerator IEMask()
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while (true)
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hitInfo = Physics.CapsuleCastAll(FollowTarget.position + Vector3.up * 0.2f, FollowTarget.position - Vector3.up * 0.1f, 0.2f, (transform.position - FollowTarget.position).normalized, 100f, layerMask);
bool flag;
for (int i = Mask.Count - 1; i >= 0; i--)
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flag = false;
for (int j = 0; j < hitInfo.Length; j++)
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if (Mask[i].GetObj() == hitInfo[j].collider.gameObject)
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flag = true;
break;
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if (!flag)
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Mask[i].PutOutTransparent();
Mask.RemoveAt(i);
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for (int i = 0; i < hitInfo.Length; i++)
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flag = false;
for (int j = 0; j < Mask.Count; j++)
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if (hitInfo[i].collider.gameObject == Mask[j].GetObj())
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flag = true;
break;
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if (!flag)
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CameraMaskInfo maskInfo = new CameraMaskInfo(hitInfo[i].collider.gameObject);
maskInfo.PutInTransparent();
Mask.Add(maskInfo);
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yield return new WaitForSeconds(0.2f);
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void Update()
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for (int i = InTransparentList.Count - 1; i >= 0; i--)
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InTransparentList[i].Sub();
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for (int i = OutTransparentList.Count - 1; i >= 0; i--)
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OutTransparentList[i].Add();
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｝遮挡物体CameraMaskInfo.cs：
using UnityEngine;
using System.Collections;
public class CameraMaskInfo
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private GameObject obj;
private Shader[] preMaterialShader;
public bool isDestroy;
#region get
public GameObject GetObj()
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return obj;
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public Shader[] GetpreMaterialShader()
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return preMaterialShader;
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#endregion
public CameraMaskInfo(GameObject obj)
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this.obj = obj;
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public void PutInTransparent()
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int id = -1;
for (int i = 0; i < CameraFollow.instance.OutTransparentList.Count; i++)
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if (CameraFollow.instance.OutTransparentList[i].GetObj() == obj)
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id = i;
//如果在out里面有，那么说明该物体的shader已经被改变，只能从之前的获得
preMaterialShader = CameraFollow.instance.OutTransparentList[i].GetpreMaterialShader();
CameraFollow.instance.InTransparentList.Add(CameraFollow.instance.OutTransparentList[i]);
CameraFollow.instance.OutTransparentList.RemoveAt(i);
break;
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if (id==-1)
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preMaterialShader = new Shader[obj.renderer.materials.Length];
for (int i = 0; i < obj.renderer.materials.Length; i++)
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preMaterialShader[i] = obj.renderer.materials[i].shader;
obj.renderer.materials[i].shader = Shader.Find("Transparent/Diffuse");
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CameraFollow.instance.InTransparentList.Add(this);
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public void PutOutTransparent()
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int id = -1;
for (int i = 0; i < CameraFollow.instance.InTransparentList.Count; i++)
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if (CameraFollow.instance.InTransparentList[i].GetObj() == obj)
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id = i;
CameraFollow.instance.OutTransparentList.Add(CameraFollow.instance.InTransparentList[i]);
CameraFollow.instance.InTransparentList.RemoveAt(i);
break;
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if (id == -1)
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CameraFollow.instance.OutTransparentList.Add(this);
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public void Add()
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for (int i = 0; i < obj.renderer.materials.Length; i++)
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obj.renderer.materials[i].color = new Color(obj.renderer.materials[i].color.r, obj.renderer.materials[i].color.g, obj.renderer.materials[i].color.b, obj.renderer.materials[i].color.a + Time.deltaTime * 2f);
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if (obj.renderer.materials[0].color.a >= 0.95f)
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for (int i = 0; i < obj.renderer.materials.Length; i++)
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obj.renderer.materials[i].color = new Color(obj.renderer.materials[i].color.r, obj.renderer.materials[i].color.g, obj.renderer.materials[i].color.b, 1f);
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SetPreShader();
CameraFollow.instance.OutTransparentList.Remove(this);
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public void Sub()
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for (int i = 0; i < obj.renderer.materials.Length; i++)
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obj.renderer.materials[i].color = new Color(obj.renderer.materials[i].color.r, obj.renderer.materials[i].color.g, obj.renderer.materials[i].color.b, obj.renderer.materials[i].color.a - Time.deltaTime * 2f);
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if (obj.renderer.materials[0].color.a <= 0.3f)
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CameraFollow.instance.InTransparentList.Remove(this);
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private void SetPreShader()
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for (int i = 0; i < obj.renderer.materials.Length; i++)
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obj.renderer.materials[i].shader = preMaterialShader[i];
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｝效果：
