Shader "Toon/Bump" {
Properties {
    _Color ("Main Color", Color) = (1,1,1,1)
    _MainTex ("Base (RGB) Gloss (A)", 2D) = "white" {}
    _BumpMap ("Normalmap", 2D) = "bump" {}
    _Ramp ("Toon Ramp (RGB)", 2D) = "gray" {}
}
SubShader {
    Tags { "RenderType"="Opaque" }
    LOD 200

CGPROGRAM
#pragma surface surf ToonRamp

sampler2D _Ramp;

// custom lighting function that uses a texture ramp based
// on angle between light direction and normal
#pragma lighting ToonRamp exclude_path:prepass
inline half4 LightingToonRamp (SurfaceOutput s, half3 lightDir, half atten)
{
    #ifndef USING_DIRECTIONAL_LIGHT
    lightDir = normalize(lightDir);
    #endif

    half d = dot (s.Normal, lightDir)*0.5 + 0.5;
    half3 ramp = tex2D (_Ramp, float2(d,d)).rgb;

    half4 c;
    c.rgb = s.Albedo * _LightColor0.rgb * ramp * (atten * 2);
    c.a = 0;
    return c;
}

sampler2D _MainTex;
sampler2D _BumpMap;
fixed4 _Color;

struct Input {
    float2 uv_MainTex : TEXCOORD0;
    float2 uv_BumpMap;
};

void surf (Input IN, inout SurfaceOutput o) {
    half4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
    o.Albedo = c.rgb;
    o.Alpha = c.a;
    o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
}
ENDCG
}

FallBack "Toon/Lighted"
}