Unity光线穿墙问题

先来一张“惊世骇俗”的效果图，这是最后效果。

今天自己在家做开发，效果觉得还能忽悠过去，但是人物走在墙边的时候，忽然发现，隔壁的房间跟着亮了…这让我很慌。
所以下面这个例子是为了解决点光源穿透的问题。

于是时好解决一下咯…纹理还没有加上，但是光是不会透过去 了，大家可以作为参考哈，下面是第一第效果图的完整代码。后面我会把它的升级版(加上法线凹凸效果的)再发出来…

Shader "Custom/DSPShader" {Properties {//主图_MainTex("MainTex",2D)="white"{}//漫反射_Diffuse("Diffuse",Color)=(1,1,1,1)//高光颜色_SpecularColor ("SpecularColor", Color) = (1,1,1,1)//高光比例_SpecularScale ("_SpecularScale", range(1,32)) = 2}SubShader {Pass {Tags{ "LightMode" = "Forwardbase" }CGPROGRAM#pragma vertex vert#pragma fragment frag#pragma multi_compile_fwdbase #include "unitycg.cginc"#include "lighting.cginc"#include "autolight.cginc"  fixed4 _SpecularColor;float _SpecularScale;sampler2D _MainTex;float4 _MainTex_ST;float4 _Diffuse;struct a2v{float4 vertex : POSITION;float2 uv : TEXCOORD0;float3 normal:NORMAL;};struct v2f{float4 pos:POSITION;float3 normal:NORMAL;float4 vertex:TEXCOORD2;float2 uv:TEXCOORD3;SHADOW_COORDS(0)       };//顶点着色器v2f vert(a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.normal = normalize(v.normal);o.vertex = v.vertex;o.uv = v.uv;TRANSFER_SHADOW(o)return o;}//片元着色器fixed4 frag(v2f v):COLOR{float3 wpos = mul(unity_ObjectToWorld, v.vertex).xyz;UNITY_LIGHT_ATTENUATION(atten, IN, wpos)  //5.//漫反射fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz;fixed3 worldNormal = normalize(mul(v.normal,(float3x3)unity_WorldToObject));fixed3 worldLightDir = normalize(_WorldSpaceLightPos0.xyz);fixed3 diffuse = _LightColor0.rgb*_Diffuse.rgb*saturate(dot(worldNormal,worldLightDir));//纹理贴图float4 tex= tex2D(_MainTex,v.uv);//高光反射float3 worldVector = normalize(WorldSpaceViewDir(v.vertex));float3 Specular = 2 * dot(worldNormal, worldLightDir)*worldNormal - worldLightDir; //phongfloat3 HeightLight = normalize(worldVector + worldLightDir);    //blinphongfloat specScale = pow(saturate(dot(Specular, worldVector)), _SpecularScale);  //phongspecScale = pow(saturate(dot(HeightLight, worldNormal)), _SpecularScale);        //blinphongSpecular+=_SpecularColor*specScale;//点光记算float3 pointLight = Shade4PointLights(unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0,unity_LightColor[0].rgb, unity_LightColor[1].rgb, unity_LightColor[2].rgb, unity_LightColor[3].rgb,unity_4LightAtten0,wpos, worldNormal);//把上面得到的值在这里做计算吧diffuse *=Specular;diffuse = tex*diffuse;diffuse.rgb += pointLight;diffuse.rgb *= atten;    //6.diffuse += UNITY_LIGHTMODEL_AMBIENT;return float4(diffuse,1);}ENDCG}//下面的用于接收与产生点光原的阴影ShaderPass {Tags{ "Lightmode" = "Forwardadd" }  Blend one oneCGPROGRAM#pragma vertex vert#pragma fragment frag#include "lighting.cginc"#include "autolight.cginc"//阴影主要来源于这句#pragma multi_compile_fwdadd_fullshadowsstruct a2v{float4 vertex : POSITION;float2 uv : TEXCOORD0;float3 normal:NORMAL;};struct v2f {float4 pos:POSITION;float3 normal:NORMAL;float4 vertex:TEXCOORD2;SHADOW_COORDS(0)};v2f vert(a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.normal = normalize(v.normal);o.vertex = v.vertex;TRANSFER_SHADOW(o)return o;}fixed4 frag(v2f i) :COLOR{float3 wpos = mul(unity_ObjectToWorld, i.vertex).xyz;UNITY_LIGHT_ATTENUATION(atten, i, wpos)//漫反射float3 worldNormal = UnityObjectToWorldNormal(i.normal);float3 worldLight = normalize(_WorldSpaceLightPos0).xyz;float ndotl = saturate(dot(worldNormal, worldLight));fixed4 diffuse = _LightColor0*ndotl;//衰减diffuse.rgb *= atten;return diffuse;}ENDCG}}Fallback "Diffuse"
}

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