先看下效果
视频有压缩，效果有点不对，下面是正确的效果
先上两段代码
using System;
using System.Collections.Generic;
using UnityEngine;
public class FadingObject : MonoBehaviour, IEquatable<FadingObject>
{
public List<Renderer> Renderers = new List<Renderer>();
public Vector3 Position;
public List<Material> Materials = new List<Material>();
[HideInInspector]
public float InitialAlpha;
//public float InitialFadeScale;
private void Awake()
{
Position = transform.position;
if (Renderers.Count == 0)
{
Renderers.AddRange(GetComponentsInChildren<Renderer>());
}
foreach(Renderer renderer in Renderers)
{
Materials.AddRange(renderer.materials);
}
InitialAlpha = Materials[0].color.a;
Materials[0].SetFloat("_DitherThreshold", 1f);
}
public bool Equals(FadingObject other)
{
return Position.Equals(other.Position);
}
public override int GetHashCode()
{
return Position.GetHashCode();
}
}
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class FadeObjectBlockingObject : MonoBehaviour
{
[SerializeField]
private LayerMask LayerMask;
[SerializeField]
private Transform Target;
[SerializeField]
private Camera Camera;
[SerializeField]
[Range(0, 1f)]
private float FadedAlpha = 0.33f;
[SerializeField]
private bool RetainShadows = true;
[SerializeField]
private Vector3 TargetPositionOffset = Vector3.up;
[SerializeField]
private float FadeSpeed = 1;
[Header("Read Only Data")]
[SerializeField]
private List<FadingObject> ObjectsBlockingView = new List<FadingObject>();
private Dictionary<FadingObject, Coroutine> RunningCoroutines = new Dictionary<FadingObject, Coroutine>();
private RaycastHit[] Hits = new RaycastHit[10];
private void OnEnable()
{
StartCoroutine(CheckForObjects());
}
private IEnumerator CheckForObjects()
{
while (true)
{
int hits = Physics.RaycastNonAlloc(
Camera.transform.position,
(Target.transform.position + TargetPositionOffset - Camera.transform.position).normalized,
Hits,
Vector3.Distance(Camera.transform.position, Target.transform.position + TargetPositionOffset),
LayerMask
);
if (hits > 0)
{
for (int i = 0; i < hits; i++)
{
FadingObject fadingObject = GetFadingObjectFromHit(Hits[i]);
if (fadingObject != null && !ObjectsBlockingView.Contains(fadingObject))
{
if (RunningCoroutines.ContainsKey(fadingObject))
{
if (RunningCoroutines[fadingObject] != null)
{
StopCoroutine(RunningCoroutines[fadingObject]);
}
RunningCoroutines.Remove(fadingObject);
}
RunningCoroutines.Add(fadingObject, StartCoroutine(FadeObjectOut(fadingObject)));
ObjectsBlockingView.Add(fadingObject);
}
}
}
FadeObjectsNoLongerBeingHit();
ClearHits();
yield return null;
}
}
private void FadeObjectsNoLongerBeingHit()
{
List<FadingObject> objectsToRemove = new List<FadingObject>(ObjectsBlockingView.Count);
foreach (FadingObject fadingObject in ObjectsBlockingView)
{
bool objectIsBeingHit = false;
for (int i = 0; i < Hits.Length; i++)
{
FadingObject hitFadingObject = GetFadingObjectFromHit(Hits[i]);
if (hitFadingObject != null && fadingObject == hitFadingObject)
{
objectIsBeingHit = true;
break;
}
}
if (!objectIsBeingHit)
{
if (RunningCoroutines.ContainsKey(fadingObject))
{
if (RunningCoroutines[fadingObject] != null)
{
StopCoroutine(RunningCoroutines[fadingObject]);
}
RunningCoroutines.Remove(fadingObject);
}
RunningCoroutines.Add(fadingObject, StartCoroutine(FadeObjectIn(fadingObject)));
objectsToRemove.Add(fadingObject);
}
}
foreach(FadingObject removeObject in objectsToRemove)
{
ObjectsBlockingView.Remove(removeObject);
}
}
private IEnumerator FadeObjectOut(FadingObject FadingObject)
{
foreach (Material material in FadingObject.Materials)
{
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
material.SetInt("_ZWrite", 0);
material.SetInt("_Surface", 1);
material.renderQueue = (int)UnityEngine.Rendering.RenderQueue.Transparent;
material.SetShaderPassEnabled("DepthOnly", false);
material.SetShaderPassEnabled("SHADOWCASTER", RetainShadows);
material.SetOverrideTag("RenderType", "Transparent");
material.EnableKeyword("_SURFACE_TYPE_TRANSPARENT");
material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
}
float time = 0;
while (FadingObject.Materials[0].color.a > FadedAlpha)
{
foreach (Material material in FadingObject.Materials)
{
if (material.HasProperty("_BaseColor"))
{
float a = Mathf.Lerp(FadingObject.InitialAlpha, FadedAlpha, time * FadeSpeed);
material.color = new Color(
material.color.r,
material.color.g,
material.color.b,
a
);
//print("_1");
//Setting fade value
material.SetFloat("_DitherThreshold", a);
}
}
time += Time.deltaTime;
yield return null;
}
if (RunningCoroutines.ContainsKey(FadingObject))
{
StopCoroutine(RunningCoroutines[FadingObject]);
RunningCoroutines.Remove(FadingObject);
}
}
private IEnumerator FadeObjectIn(FadingObject FadingObject)
{
float time = 0;
while (FadingObject.Materials[0].color.a < FadingObject.InitialAlpha)
{
foreach (Material material in FadingObject.Materials)
{
if (material.HasProperty("_BaseColor"))
{
float a = Mathf.Lerp(FadedAlpha, FadingObject.InitialAlpha, time * FadeSpeed);
material.color = new Color(
material.color.r,
material.color.g,
material.color.b,
a
);
//Setting fade value
material.SetFloat("_DitherThreshold", a);
}
}
time += Time.deltaTime;
yield return null;
}
foreach (Material material in FadingObject.Materials)
{
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
material.SetInt("_ZWrite", 1);
material.SetInt("_Surface", 0);
material.renderQueue = (int)UnityEngine.Rendering.RenderQueue.Geometry;
material.SetShaderPassEnabled("DepthOnly", true);
material.SetShaderPassEnabled("SHADOWCASTER", true);
material.SetOverrideTag("RenderType", "Opaque");
material.DisableKeyword("_SURFACE_TYPE_TRANSPARENT");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
}
if (RunningCoroutines.ContainsKey(FadingObject))
{
StopCoroutine(RunningCoroutines[FadingObject]);
RunningCoroutines.Remove(FadingObject);
}
}
private void ClearHits()
{
System.Array.Clear(Hits, 0, Hits.Length);
}
private FadingObject GetFadingObjectFromHit(RaycastHit Hit)
{
return Hit.collider != null ? Hit.collider.GetComponent<FadingObject>() : null;
}
}
放一个自动抓取场景中的物体然后再实现遮挡处理的脚本，这个主要是用在main camera需要从全局调用的场景
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class FadeObjectBlockingObject : MonoBehaviour
{
[SerializeField]
private LayerMask LayerMask;
[SerializeField]
private Transform Target;
[SerializeField]
private Camera Camera;
[SerializeField]
[Range(0, 1f)]
private float FadedAlpha = 0.33f;
[SerializeField]
private bool RetainShadows = true;
[SerializeField]
private Vector3 TargetPositionOffset = Vector3.up;
[SerializeField]
private float FadeSpeed = 1;
[Header("Read Only Data")]
[SerializeField]
private List<FadingObject> ObjectsBlockingView = new List<FadingObject>();
private Dictionary<FadingObject, Coroutine> RunningCoroutines = new Dictionary<FadingObject, Coroutine>();
private RaycastHit[] Hits = new RaycastHit[10];
void Start()
{
this.Camera = Camera.main;
this.Target = this.transform;
if (this.transform.parent.name == "ePlayer")
{
StartCoroutine(CheckForObjects());
}
}
private void OnEnable()
{
}
private IEnumerator CheckForObjects()
{
while (true)
{
int hits = Physics.RaycastNonAlloc(
Camera.transform.position,
(Target.transform.position + TargetPositionOffset - Camera.transform.position).normalized,
Hits,
Vector3.Distance(Camera.transform.position, Target.transform.position + TargetPositionOffset),
LayerMask
);
// Gizmos.DrawLine(Camera.transform.position, Target.transform.position);
// Debug.DrawLine(Camera.transform.position, Target.transform.position , Color.red, 0.5f );
if (hits > 0)
{
for (int i = 0; i < hits; i++)
{
FadingObject fadingObject = GetFadingObjectFromHit(Hits[i]);
if (fadingObject != null && !ObjectsBlockingView.Contains(fadingObject))
{
if (RunningCoroutines.ContainsKey(fadingObject))
{
if (RunningCoroutines[fadingObject] != null)
{
StopCoroutine(RunningCoroutines[fadingObject]);
}
RunningCoroutines.Remove(fadingObject);
}
RunningCoroutines.Add(fadingObject, StartCoroutine(FadeObjectOut(fadingObject)));
ObjectsBlockingView.Add(fadingObject);
}
}
}
FadeObjectsNoLongerBeingHit();
ClearHits();
yield return null;
}
}
private void FadeObjectsNoLongerBeingHit()
{
List<FadingObject> objectsToRemove = new List<FadingObject>(ObjectsBlockingView.Count);
foreach (FadingObject fadingObject in ObjectsBlockingView)
{
bool objectIsBeingHit = false;
for (int i = 0; i < Hits.Length; i++)
{
FadingObject hitFadingObject = GetFadingObjectFromHit(Hits[i]);
if (hitFadingObject != null && fadingObject == hitFadingObject)
{
objectIsBeingHit = true;
break;
}
}
if (!objectIsBeingHit)
{
if (RunningCoroutines.ContainsKey(fadingObject))
{
if (RunningCoroutines[fadingObject] != null)
{
StopCoroutine(RunningCoroutines[fadingObject]);
}
RunningCoroutines.Remove(fadingObject);
}
RunningCoroutines.Add(fadingObject, StartCoroutine(FadeObjectIn(fadingObject)));
objectsToRemove.Add(fadingObject);
}
}
foreach(FadingObject removeObject in objectsToRemove)
{
ObjectsBlockingView.Remove(removeObject);
}
}
private IEnumerator FadeObjectOut(FadingObject FadingObject)
{
foreach (Material material in FadingObject.Materials)
{
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
material.SetInt("_ZWrite", 0);
material.SetInt("_Surface", 1);
material.renderQueue = (int)UnityEngine.Rendering.RenderQueue.Transparent;
material.SetShaderPassEnabled("DepthOnly", false);
material.SetShaderPassEnabled("SHADOWCASTER", RetainShadows);
material.SetOverrideTag("RenderType", "Transparent");
material.EnableKeyword("_SURFACE_TYPE_TRANSPARENT");
material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
}
float time = 0;
while (FadingObject.Materials[0].color.a > FadedAlpha)
{
foreach (Material material in FadingObject.Materials)
{
if (material.HasProperty("_BaseColor"))
{
float a = Mathf.Lerp(FadingObject.InitialAlpha, FadedAlpha, time * FadeSpeed);
material.color = new Color(
material.color.r,
material.color.g,
material.color.b,
a
);
//print("_1");
//Setting fade value
material.SetFloat("_DitherThreshold", a);
}
}
time += Time.deltaTime;
yield return null;
}
if (RunningCoroutines.ContainsKey(FadingObject))
{
StopCoroutine(RunningCoroutines[FadingObject]);
RunningCoroutines.Remove(FadingObject);
}
}
private IEnumerator FadeObjectIn(FadingObject FadingObject)
{
float time = 0;
while (FadingObject.Materials[0].color.a < FadingObject.InitialAlpha)
{
foreach (Material material in FadingObject.Materials)
{
if (material.HasProperty("_BaseColor"))
{
float a = Mathf.Lerp(FadedAlpha, FadingObject.InitialAlpha, time * FadeSpeed);
material.color = new Color(
material.color.r,
material.color.g,
material.color.b,
a
);
//Setting fade value
material.SetFloat("_DitherThreshold", a);
}
}
time += Time.deltaTime;
yield return null;
}
foreach (Material material in FadingObject.Materials)
{
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
material.SetInt("_ZWrite", 1);
material.SetInt("_Surface", 0);
material.renderQueue = (int)UnityEngine.Rendering.RenderQueue.Geometry;
material.SetShaderPassEnabled("DepthOnly", true);
material.SetShaderPassEnabled("SHADOWCASTER", true);
material.SetOverrideTag("RenderType", "Opaque");
material.DisableKeyword("_SURFACE_TYPE_TRANSPARENT");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
}
if (RunningCoroutines.ContainsKey(FadingObject))
{
StopCoroutine(RunningCoroutines[FadingObject]);
RunningCoroutines.Remove(FadingObject);
}
}
private void ClearHits()
{
System.Array.Clear(Hits, 0, Hits.Length);
}
private FadingObject GetFadingObjectFromHit(RaycastHit Hit)
{
return Hit.collider != null ? Hit.collider.GetComponent<FadingObject>() : null;
}
}