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Shader "ly/Outline_2Pass_1"{    Properties    {        _MainTex("Texture", 2D) = "white"{}        _Outline("Outline", range(0, 1)) = 0.02        _OutlineColor("Outline Color", Color) = (1,1,1,1)    }            SubShader    {        //第一個批次，畫描邊        Pass        {            //Cull掉前面的一半，只讓描邊顯示在后面            Cull Front            CGPROGRAM            #pragma vertex vert            #pragma fragment frag            #include "UnityCG.cginc"            fixed _Outline;            fixed4 _OutlineColor;            struct v2f            {                float4 pos : SV_POSITION;                float4 color : COLOR;            };            v2f vert (appdata_full v)            {                v2f o;                //源頂點位置添加法線方向乘以參數(shù)的偏移量                v.vertex.xyz += v.normal * _Outline;                //位置從自身坐標系轉(zhuǎn)換到投影空間                //舊版本o.pos = mul(UNITY_MATRIX_MVP,v.vertex);                o.pos = UnityObjectToClipPos(v.vertex);                //描邊顏色                o.color = _OutlineColor;                return o;            }                        float4 frag (v2f i) : COLOR            {                return i.color; //描邊            }            ENDCG        }        //第二個批次        Pass        {            CGPROGRAM            #pragma vertex vert            #pragma fragment frag            #include "UnityCG.cginc"            sampler2D _MainTex;            half4 _MainTex_ST;            struct v2f            {                float4 pos : SV_POSITION;                float2 uv : TEXCOORD0;                fixed4 color : COLOR;            };            v2f vert(appdata_base v)            {                v2f o;                o.pos = UnityObjectToClipPos(v.vertex);                o.uv = v.texcoord;                o.color = fixed4(0, 0, 0, 1);                return o;            }            fixed4 frag(v2f i) : SV_Target            {                fixed4 col = tex2D(_MainTex, i.uv);                return col;            }            ENDCG        }    }}

Shader "ly/Outline_2Pass_2"{    Properties    {        _MainTex("Texture", 2D) = "white"{}        _Outline("Outline", range(0, 1)) = 0.02        _OutlineColor("Outline Color", Color) = (1,1,1,1)    }            SubShader    {        //第一個批次，畫描邊        Pass        {            //Cull掉前面的一半，只讓描邊顯示在后面            Cull Front            CGPROGRAM            #pragma vertex vert            #pragma fragment frag            #include "UnityCG.cginc"            fixed _Outline;            fixed4 _OutlineColor;            struct v2f            {                float4 pos : SV_POSITION;                float4 uv : TEXCOORD0;            };            v2f vert (appdata_full v)            {                v2f o;                //位置從自身坐標系轉(zhuǎn)換到投影空間                //舊版本o.pos = mul(UNITY_MATRIX_MVP,v.vertex);                o.pos = UnityObjectToClipPos(v.vertex);                //方式二，擴張頂點位置                //法線變換到投影空間                //float3 normal = mul((float3x3)UNITY_MATRIX_IT_MV, v.normal);                //得到投影空間的偏移                //float2 offset = TransformViewToProjection(normal.xy);                ////方式三，把頂點當做方向矢量，在方向矢量的方向偏移                float3 dir = normalize(v.vertex.xyz);                dir = mul((float3x3)UNITY_MATRIX_IT_MV, dir);                float2 offset = TransformViewToProjection(dir.xy);                //有一些情況下，側(cè)邊看不到，所以把方式一和二的算法相結(jié)合                //float3 dir = normalize(v.vertex.xyz);                //float3 dir2 = v.normal;                //float D = dot(dir, dir2);                //D = (1 + D / _Outline) / (1 + 1 / _Outline);                //dir = lerp(dir2, dir, D);                //dir = mul((float3x3)UNITY_MATRIX_IT_MV, dir);                //float2 offset = TransformViewToProjection(dir.xy);                //offset = normalize(offset);                //在xy兩個方向上偏移頂點的位置                o.pos.xy += offset * o.pos.z * _Outline;                return o;            }                        float4 frag (v2f i) : COLOR            {                return _OutlineColor; //描邊            }            ENDCG        }        //第二個批次，略}

v2f vert (appdata_full v){　　v2f o;　　//略
　　//_RimColor邊緣光顏色　　
　　//_RimPower邊緣光強度
　　float3 viewDir = normalize(ObjSpaceViewDir(v.vertex));　　float dotProduct = 1 - dot(normalize(v.normal), viewDir);　　fixed3 rimCol = smoothstep(1 - _RimPower, 1.0, dotProduct) * _RimColor;　　o.color = rimCol;　　//略  　return o;      }

using UnityEngine;using UnitySampleAssets.ImageEffects;[RequireComponent(typeof(Camera))][AddComponentMenu("Image Effects/Other/Post Effect Outline")]class PostEffectOutline : PostEffectsBase{    public enum OutLineMethod    {        eIteration,        eScale,    }    private Camera attachCamera;    private Camera outlineCamera;    private Shader simpleShader;    private Shader postOutlineShader;    private Material postOutlineMat;    private RenderTexture mTempRT;    public Color outlineColor = new Color(0, 1f, 0, 1f);// Color.green;    [Range(0, 10)]    public int outlineWidth = 1;    [Range(1, 9)]    public int iterations = 1;    public OutLineMethod outlineMethod = OutLineMethod.eIteration;    void Awake()    {        FindShaders();    }    void FindShaders()    {        if (!simpleShader)            simpleShader = Shader.Find("ly/DrawSimple");        if (outlineMethod == OutLineMethod.eIteration)        {            if (!postOutlineShader)                postOutlineShader = Shader.Find("ly/PostOutlineIteration");        }        else        {            if (!postOutlineShader)                postOutlineShader = Shader.Find("ly/PostOutlineScale");        }    }    protected override void Start()    {        base.Start();        attachCamera = GetComponent<Camera>();        if (outlineCamera == null)        {            outlineCamera = new GameObject().AddComponent<Camera>();            outlineCamera.enabled = false;            outlineCamera.transform.parent = attachCamera.transform;            outlineCamera.name = "outlineCam";        }        postOutlineMat = new Material(postOutlineShader);    }    public override bool CheckResources()    {        CheckSupport(false);        if (!isSupported)            ReportAutoDisable();        return isSupported;    }    private void OnRenderImage(RenderTexture source, RenderTexture destination)    {        if (CheckResources() == false)        {            Graphics.Blit(source, destination);            return;        }        outlineCamera.CopyFrom(attachCamera);        outlineCamera.clearFlags = CameraClearFlags.Color;        outlineCamera.backgroundColor = Color.black;        outlineCamera.cullingMask = 1 << LayerMask.NameToLayer("Unit");        if (mTempRT == null)            mTempRT = RenderTexture.GetTemporary(source.width, source.height, source.depth);        mTempRT.Create();        outlineCamera.targetTexture = mTempRT;        outlineCamera.RenderWithShader(simpleShader, "");        postOutlineMat.SetTexture("_SceneTex", source);        postOutlineMat.SetColor("_Color", outlineColor);        postOutlineMat.SetInt("_Width", outlineWidth);        postOutlineMat.SetInt("_Iterations", iterations);        //畫描邊混合材質(zhì)        Graphics.Blit(mTempRT, destination, postOutlineMat);        mTempRT.Release();    }}

Shader "ly/DrawSimple"{    FallBack OFF}

// ly 類似高斯模糊方式迭代循環(huán)處理描邊Shader "ly/PostOutlineIteration"{    Properties    {        _MainTex("Main Texture", 2D) = "black"{}        //畫完物體面積后的紋理        _SceneTex("Scene Texture", 2D) = "black"{}        //原場景紋理        _Color("Outline Color", Color) = (0,1,0,0.8)        //描邊顏色        _Width("Outline Width", int) = 1                //描邊寬度        _Iterations("Iterations", int) = 1                //描邊迭代次數(shù)（越多越平滑，消耗越高）    }    SubShader    {        Pass        {            CGPROGRAM            sampler2D _MainTex;            float2 _MainTex_TexelSize;            sampler2D _SceneTex;            fixed4 _Color;            float _Width;            int _Iterations;            #pragma vertex vert            #pragma fragment frag                #include "UnityCG.cginc"            struct v2f            {                float4 pos : SV_POSITION;                float2 uv : TEXCOORD0;            };            v2f vert(appdata_base v)            {                v2f o;                o.pos = UnityObjectToClipPos(v.vertex);                o.uv = v.texcoord.xy;                return o;            }            half4 frag(v2f i) : COLOR            {                //迭代次數(shù)為奇數(shù)，保證對稱                int iterations = _Iterations * 2 + 1;                float ColorIntensityInRadius;                float Tx_x = _MainTex_TexelSize.x * _Width;                float Tx_y = _MainTex_TexelSize.y * _Width;                //計算是否大于0，則此像素屬于外邊的范圍內(nèi)                for (int k=0; k<iterations; k+=1)                {                    for (int j=0; j<iterations; j+=1)                    {                        ColorIntensityInRadius += tex2D(_MainTex, i.uv.xy + float2((k - iterations / 2) * Tx_x, (j - iterations / 2) * Tx_y));                    }                }                //如果有顏色，或者不在外邊的范圍內(nèi)，則渲染原場景。否則，在外邊內(nèi)，渲染描邊。                if (tex2D(_MainTex, i.uv.xy).r > 0 || ColorIntensityInRadius == 0)                    return tex2D(_SceneTex, i.uv);                else                    return  _Color.a * _Color + (1 - _Color.a)*tex2D(_SceneTex, i.uv);            }            ENDCG        }    }}

// ly 擴張剪影uv來填充描邊Shader "ly/PostOutlineScale"{    Properties    {        _MainTex("Main Texture", 2D) = "black"{}        //畫完物體面積后的紋理        _SceneTex("Scene Texture", 2D) = "black"{}        //原場景紋理        _Color("Outline Color", Color) = (0,1,0,1)        //描邊顏色        _Width("Outline Width", float) = 1                //描邊寬度    }    SubShader    {        Pass        {            CGPROGRAM            sampler2D _MainTex;            sampler2D _SceneTex;            float2 _SceneTex_TexelSize;            fixed4 _Color;            float _Width;            #pragma vertex vert            #pragma fragment frag                #include "UnityCG.cginc"            struct v2f            {                float4 pos : SV_POSITION;                half2 uv[2] : TEXCOORD0;                half2 uv2[4] : TEXCOORD2;            };            v2f vert(appdata_base v)            {                v2f o;                o.pos = UnityObjectToClipPos(v.vertex);                o.uv[0] = v.texcoord.xy;                o.uv[1] = v.texcoord.xy;                half2 offs = _SceneTex_TexelSize.xy * _Width;                o.uv2[0].x = v.texcoord.x - offs.x;                o.uv2[0].y = v.texcoord.y - offs.y;                o.uv2[1].x = v.texcoord.x + offs.x;                o.uv2[1].y = v.texcoord.y - offs.y;                o.uv2[2].x = v.texcoord.x + offs.x;                o.uv2[2].y = v.texcoord.y + offs.y;                o.uv2[3].x = v.texcoord.x - offs.x;                o.uv2[3].y = v.texcoord.y + offs.y;                if (_SceneTex_TexelSize.y < 0)                {                    o.uv[1].y = 1 - o.uv[1].y;                    o.uv2[0].y = 1 - o.uv2[0].y;                    o.uv2[1].y = 1 - o.uv2[1].y;                    o.uv2[2].y = 1 - o.uv2[2].y;                    o.uv2[3].y = 1 - o.uv2[3].y;                }                return o;            }            half4 frag(v2f i) : COLOR            {                fixed4 stencil = tex2D(_MainTex, i.uv[1]);                // 有剪影的部分，顯示原圖                if (any(stencil.rgb))                {                    fixed4 framebuffer = tex2D(_SceneTex, i.uv[0]);                    return framebuffer;                }                // 沒有剪影的部分，先把剪影擴張，擴張出顏色的部分用剪影，沒有顏色的用原圖                else                {                    fixed4 color1 = tex2D(_MainTex, i.uv2[0]);                    fixed4 color2 = tex2D(_MainTex, i.uv2[1]);                    fixed4 color3 = tex2D(_MainTex, i.uv2[2]);                    fixed4 color4 = tex2D(_MainTex, i.uv2[3]);                    fixed4 color;                    color.rgb = max(color1.rgb, color2.rgb);                    color.rgb = max(color.rgb, color3.rgb);                    color.rgb = max(color.rgb, color4.rgb);                    if (any(color.rgb))                    {                        return _Color;                        //color.a = (color1.a + color2.a + color3.a + color4.a) * 0.25;                        //return color;                    }                    else                    {                        fixed4 framebuffer = tex2D(_SceneTex, i.uv[0]);                        return framebuffer;                    }                }            }            ENDCG        }    }    SubShader    {        Pass        {            SetTexture[_MainTex]{}        }    }    Fallback Off}