Unity残影制作

最新推荐文章于 2025-03-08 23:23:05 发布

ZeratuJiang

最新推荐文章于 2025-03-08 23:23:05 发布

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分类专栏： Unity3d Effect 文章标签： unity Effect

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本文介绍了一种在Unity中实现酷炫残影效果的方法。通过使用自定义Shader，结合Lateupdate调用时机，实现了稳定的视觉效果。代码示例展示了如何创建残影对象，并设置其颜色及淡出时间。

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最近尝试制作一些酷炫的残影效果，比较了很多方法，觉得这个办法是比较稳定靠谱的，选择Lateupdate为调用时机很好的展示了对Monobehaviour的深刻理解，非常棒的设计，受益匪浅！

原文地址
这里写图片描述

残影Shader

Shader "Wonderm/Ghost" {
    Properties{
      _MainTex("Texture", 2D) = "white" {}
      _BumpMap("Bumpmap", 2D) = "bump" {}
      _RimColor("Rim Color", Color) = (0.46,0.0,1.0,0.0)
      _RimPower("Rim Power", Range(0.2,2.0)) = 0.5
      _Brightness("Brightness",Range(0.0,3.0)) = 1.0
    }
        SubShader{
          Tags { "RenderType" = "Transparent" "Queue" = "Transparent" "IgnoreProjector" = "True"}
          // extra pass that renders to depth buffer only
           Pass {
              ZWrite On
              ColorMask 0
             }
            CGPROGRAM
            #pragma surface surf Lambert alpha noambient nolightmap nodirlightmap  novertexlights
            struct Input {
                float2 uv_MainTex;
                float2 uv_BumpMap;
                float3 viewDir;
            };
            sampler2D _MainTex;
            sampler2D _BumpMap;
            float4 _RimColor;
            float _RimPower;
            float _Brightness;
            void surf(Input IN, inout SurfaceOutput o) {
              half4 basecol = tex2D(_MainTex, IN.uv_MainTex);
                  half3 graycol = dot(basecol.rgb,float3(0.3,0.59,0.11));
                o.Albedo = graycol;
                o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
                half rim = 1.0 - saturate(dot(normalize(IN.viewDir), o.Normal));
                o.Emission = _RimColor.rgb * pow(rim, _RimPower) * _Brightness;
                o.Alpha = (o.Emission.r + o.Emission.g + o.Emission.b) / 3.0;
            }
            ENDCG
      }
          Fallback "Diffuse"
}

代码

public static void ShowGhost(SkinnedMeshRenderer render, Color color, Vector3 pos, Quaternion rot, float fadeOutTime)
   {
       if (fadeOutTime == 0 || render == null) return;
       var ghostMat = new Material(Shader.Find("Wonderm/Ghost"));
       ghostMat.SetColor("_RimColor", color);
       var newMesh = new Mesh();
       render.BakeMesh(newMesh);
       var newMats = new Material[render.sharedMaterials.Length];
       for (int i = 0; i < newMats.Length; i++) { newMats[i] = ghostMat; }
       var obj = new GameObject("Ghost");
       obj.transform.position = pos;
       obj.transform.rotation = rot;
       var newFilter = obj.AddComponent<MeshFilter>();
       newFilter.sharedMesh = newMesh;
       var newRender = obj.AddComponent<MeshRenderer>();
       newRender.sharedMaterials = newMats;
       newRender.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
       newRender.receiveShadows = false;
       /*
        此处添加淡出代码
       */
       if (fadeOutTime > 0)
           GameObject.Destroy(obj, fadeOutTime);
   }