--- Fur Shader ---

fixed4 _Color;
sampler2D _MainTex;
half _Glossiness;
half _Metallic;

uniform float _FurLength;
uniform float _Cutoff;
uniform float _CutoffEnd;
uniform float _EdgeFade;

uniform fixed3 _Gravity;
uniform fixed _GravityStrength;

void vert (inout appdata_full v)
{
    fixed3 direction = lerp(v.normal, _Gravity * _GravityStrength + v.normal * (1-_GravityStrength), FUR_MULTIPLIER);
    v.vertex.xyz += direction * _FurLength * FUR_MULTIPLIER * v.color.a;
    //v.vertex.xyz += v.normal * _FurLength * FUR_MULTIPLIER * v.color.a;
}

struct Input {
    float2 uv_MainTex;
    float3 viewDir;
};

void surf (Input IN, inout SurfaceOutputStandard o) {
    fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
    o.Albedo = c.rgb;
    o.Metallic = _Metallic;
    o.Smoothness = _Glossiness;

    //o.Alpha = step(_Cutoff, c.a);
    o.Alpha = step(lerp(_Cutoff,_CutoffEnd,FUR_MULTIPLIER), c.a);

    float alpha = 1 - (FUR_MULTIPLIER * FUR_MULTIPLIER);
    alpha += dot(IN.viewDir, o.Normal) - _EdgeFade;

    o.Alpha *= alpha;
}

    SubShader {
        Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
        ZWrite On
        LOD 200

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows
        #pragma target 3.0

        fixed4 _Color;
        sampler2D _MainTex;
        half _Glossiness;
        half _Metallic;

        struct Input {
            float2 uv_MainTex;
        };

        void surf (Input IN, inout SurfaceOutputStandard o) {
            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
            o.Albedo = c.rgb;
            o.Metallic = _Metallic;
            o.Smoothness = _Glossiness;
            o.Alpha = c.a;
        }
        ENDCG


        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows alpha:blend vertex:vert
        #define FUR_MULTIPLIER 0.025
        #include "FurPass.cginc"
        ENDCG

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows alpha:blend vertex:vert
        #define FUR_MULTIPLIER 0.05
        #include "FurPass.cginc"
        ENDCG

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows alpha:blend vertex:vert
        #define FUR_MULTIPLIER 0.075
        #include "FurPass.cginc"
        ENDCG
    }

--- Dissolve Shader ---
        struct Input {
            float2 uv_MainTex;
        };

        void surf (Input IN, inout SurfaceOutput o) {

            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;

            half dissolve = tex2D(_DissolveMap, IN.uv_MainTex).rbg - _DissolveAmount * 1.1f;
            clip(dissolve);

            if (dissolve < _BurnSize && _DissolveAmount > 0)
            {
                o.Emission = tex2D(_BurnRamp, float2(dissolve * (1 / _BurnSize), 0)) * _EmissionAmount;
            }

            o.Albedo = c.rgb;
            o.Alpha = c.a;
        }