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Shader "Unity Shaders Book/Chapter 7/Ramp Texture" { Properties { _Color ("Color Tint", Color) = (1, 1, 1, 1) _RampTex ("Ramp Tex", 2D) = "white" {} _Specular ("Specular", Color) = (1, 1, 1, 1) _Gloss ("Gloss", Range(8.0, 256)) = 20 } SubShader { Pass { Tags { "LightMode"="ForwardBase" } CGPROGRAM #pragma vertex vert #pragma fragment frag
#include "Lighting.cginc" fixed4 _Color; sampler2D _RampTex; float4 _RampTex_ST; fixed4 _Specular; float _Gloss; struct a2v { float4 vertex : POSITION; float3 normal : NORMAL; float4 texcoord : TEXCOORD0; }; struct v2f { float4 pos : SV_POSITION; float3 worldNormal : TEXCOORD0; float3 worldPos : TEXCOORD1; float2 uv : TEXCOORD2; }; v2f vert(a2v v) { v2f o; o.pos = UnityObjectToClipPos(v.vertex); o.worldNormal = UnityObjectToWorldNormal(v.normal); o.worldPos = mul(unity_ObjectToWorld, v.vertex).xyz; o.uv = TRANSFORM_TEX(v.texcoord, _RampTex); return o; } fixed4 frag(v2f i) : SV_Target { fixed3 worldNormal = normalize(i.worldNormal); fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(i.worldPos)); fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz; fixed halfLambert = 0.5 * dot(worldNormal, worldLightDir) + 0.5; fixed3 diffuseColor = tex2D(_RampTex, fixed2(halfLambert, halfLambert)).rgb * _Color.rgb; fixed3 diffuse = _LightColor0.rgb * diffuseColor; fixed3 viewDir = normalize(UnityWorldSpaceViewDir(i.worldPos)); fixed3 halfDir = normalize(worldLightDir + viewDir); fixed3 specular = _LightColor0.rgb * _Specular.rgb * pow(max(0, dot(worldNormal, halfDir)), _Gloss); return fixed4(ambient + diffuse + specular, 1.0); } ENDCG } } FallBack "Specular" }
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