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Add Light Probe Proxy Volume support to a custom shader in the Built-In Render Pipeline

An example of a particle shader that uses the ShadeSHPerPixel function to add support for a Light Probe Proxy Volume.
阅读时间1 分钟最后更新于 1 个月前
重要
The Built-In Render Pipeline is deprecated and will be made obsolete in a future release.
It remains supported, including bug fixes and maintenance, through the full Unity 6.7 LTS lifecycle.
For more information on migration, refer to Migrating from the Built-In Render Pipeline to the Universal Render Pipeline and Render pipeline feature comparison.
The following is an example of a particle shader using the 
ShadeSHPerPixel
function.
Shader "Particles/AdditiveLPPV" {Properties {    _MainTex ("Particle Texture", 2D) = "white" {}    _TintColor ("Tint Color", Color) = (0.5,0.5,0.5,0.5)}Category {    Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }    Blend SrcAlpha One    ColorMask RGB    Cull Off Lighting Off ZWrite Off    SubShader {        Pass {            HLSLPROGRAM            #pragma vertex vert            #pragma fragment frag            #pragma multi_compile_particles            #pragma multi_compile_fog            // Specify the target            #pragma target 3.0            #include "UnityCG.cginc"            // You must include this header to have access to ShadeSHPerPixel            #include "UnityStandardUtils.cginc"            half4 _TintColor;            sampler2D _MainTex;            struct appdata_t {                float4 vertex : POSITION;                float3 normal : NORMAL;                half4 color : COLOR;                float2 texcoord : TEXCOORD0;            };            struct v2f {                float4 vertex : SV_POSITION;                half4 color : COLOR;                float2 texcoord : TEXCOORD0;                UNITY_FOG_COORDS(1)                float3 worldPos : TEXCOORD2;                float3 worldNormal : TEXCOORD3;            };            float4 _MainTex_ST;            v2f vert (appdata_t v)            {                v2f o;                o.vertex = UnityObjectToClipPos(v.vertex);                o.worldNormal = UnityObjectToWorldNormal(v.normal);                o.worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;                o.color = v.color;                o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);                UNITY_TRANSFER_FOG(o,o.vertex);                return o;            }            half4 frag (v2f i) : SV_Target            {                half3 currentAmbient = half3(0, 0, 0);                half3 ambient = ShadeSHPerPixel(i.worldNormal, currentAmbient, i.worldPos);                half4 col = _TintColor * i.color * tex2D(_MainTex, i.texcoord);                col.xyz += ambient;                UNITY_APPLY_FOG_COLOR(i.fogCoord, col, half4(0,0,0,0)); // fog towards black due to our blend mode                return col;            }            ENDHLSL        }    }}}

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