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| Shader "test/NPR07_hair"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
_Color("Color",Color) = (1,1,1,1)
_Ramp ("Ramp", 2D) = "white" {}
_Bump ("Normal", 2D) = "white" {}
_HairLightRamp ("HairLightRamp", 2D) = "white" {}
_LightMapMask ("LightMapMask", 2D) = "white" {}
[Space(10)][Header(xxxxxxxxxxxxxxxx)]
_Specular("Specular",Color) = (1,1,1,1)
_SpecularScale("SpecularScale", Range(0, 5)) = 1
[Space(10)][Header(xxxxxxxxxxxxxxxx)]
_MainSpecularSmooth("MainHairSpecularSmooth", Range(-10, 100)) = 1
_FuSpecularSmooth("FuHairSpecularSmooth", Range(-10, 100)) = 1
_MainSpecularOff("MainHairSpecularOff", Range(-10, 10)) = 1
_FuSpecularOff("FuHairSpecularOff", Range(-10, 10)) = 1
[Space(10)][Header(xxxxxxxxxxxxxxxx)]
_RimPower("RimPower", Range(0.2, 10)) = 1
}
SubShader
{
Tags { "RenderType"="Opaque" }
LOD 100
Pass {
Tags { "LightMode"="ForwardBase" }
Cull off
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile_fwdbase
#include "UnityCG.cginc"
#include "Lighting.cginc"
#include "AutoLight.cginc"
#include "UnityShaderVariables.cginc"
fixed4 _Color;
sampler2D _MainTex;
float4 _MainTex_ST;
sampler2D _Bump;
float4 _Bump_ST;
sampler2D _Ramp;
fixed4 _Specular;
fixed _SpecularScale;
fixed _MainSpecularSmooth;
fixed _FuSpecularSmooth;
float _MainSpecularOff;
float _FuSpecularOff;
sampler2D _HairLightRamp;
float4 _HairLightRamp_ST;
float _RimPower;
sampler2D _LightMapMask;
struct a2v {
float4 vertex : POSITION;
float3 normal : NORMAL;
float4 texcoord : TEXCOORD0;
float4 tangent : TANGENT;
};
struct v2f {
float4 pos : POSITION;
float2 uv : TEXCOORD0;
float3 worldNormal : TEXCOORD1;
float3 worldPos : TEXCOORD2;
SHADOW_COORDS(3)
float3 tangent : TEXCOORD4;
float2 hairLightUV:TEXCOORD5;
float2 uv_Bump : TEXCOORD6;
float3 normal : TEXCOORD7;
};
v2f vert (a2v v) {
v2f o;
o.pos = UnityObjectToClipPos( v.vertex);
o.normal = v.normal;
o.uv = TRANSFORM_TEX (v.texcoord, _MainTex);
o.hairLightUV = TRANSFORM_TEX(v.texcoord, _HairLightRamp);
o.uv_Bump = TRANSFORM_TEX(v.texcoord, _Bump);
o.worldNormal = UnityObjectToWorldNormal(v.normal);
o.worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
TRANSFER_SHADOW(o);
half4 p_tangent = mul(unity_ObjectToWorld, v.tangent);
o.tangent = normalize(p_tangent).xyz;
o.tangent = cross(o.tangent, o.worldNormal);
return o;
}
float3 ShiftTangent(float3 T, float3 N, float shift)
{
float3 shiftedT = T + (shift * N);
return normalize(shiftedT);
}
float StrandSpecular(float3 T, float3 V, float3 L, float exponent)
{
float3 halfDir = normalize(L + V);
float dotTH = dot(T, halfDir);
float sinTH = max(0.01,sqrt(1 - pow(dotTH, 2)));
float dirAtten = smoothstep(-1,0, dotTH);
return dirAtten * pow(sinTH, exponent);
}
float3 LightMapColor(fixed3 worldLightDir,fixed3 worldNormalDir, fixed2 uv)
{
float LdotN = max(0, dot(worldLightDir, worldNormalDir));
float3 lightColor = LdotN * tex2D(_LightMapMask, uv);
return lightColor;
}
float4 frag(v2f i) : SV_Target {
fixed3 worldNormal = normalize(i.worldNormal);
fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(i.worldPos));
fixed3 worldViewDir = normalize(UnityWorldSpaceViewDir(i.worldPos));
fixed3 worldHalfDir = normalize(worldLightDir + worldViewDir);
fixed4 c = tex2D (_MainTex, i.uv);
fixed3 albedo = c.rgb * _Color.rgb;
fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz * albedo;
UNITY_LIGHT_ATTENUATION(atten, i, i.worldPos);
fixed diff = dot(worldNormal, worldLightDir);
diff = (diff * 0.5 + 0.5) * atten;
fixed3 diffuse = _LightColor0.rgb * albedo * tex2D(_Ramp, float2(diff, diff)).rgb;
float3 speTex = tex2D(_HairLightRamp, i.hairLightUV);
float3 Ts = ShiftTangent(i.tangent, worldNormal, _MainSpecularOff * speTex);
float3 Tf = ShiftTangent(i.tangent, worldNormal, _FuSpecularOff * speTex);
float specMain = StrandSpecular(Ts, worldViewDir, worldLightDir, _MainSpecularSmooth);
float specFu = StrandSpecular(Tf, worldViewDir, worldLightDir, _FuSpecularSmooth);
float specFinal = specMain;
specFinal *= _SpecularScale ;
fixed3 specular = _Specular.rgb * specFinal * atten;
half rim = 1.0 - saturate(dot(worldViewDir, worldNormal));
rim = pow(rim, _RimPower);
fixed3 ao = LightMapColor(worldLightDir, worldNormal,i.uv).rgb;
return fixed4((ambient + diffuse + specular + rim) , 1.0 );
}
ENDCG
}
}
FallBack "Diffuse"
}
|
