Shader "Custom/Tree_leavf"
{
    Properties
    {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        _MaskTex("MaskTex",2D) = "white" {}
        _BumpMap("Normal",2D)= "bump" {}
        _AlphaCut("CutOff",Range(0,1)) = 0.5
        _Glossiness ("Smoothness", Range(0,1)) = 0.5
        _Metallic ("Metallic", Range(0,1)) = 0.0
        _OccColor ("OccColor", Color) = (1,1,1,1)
        _NoisTex("NoisTex",2D)="white" {}
        _TreeCol1("TreeCol1",Color) = (1,1,1,1)
        _TreeCol2("TreeCol2",Color) = (1,1,1,1)
    }
    SubShader
    {
        Cull Off
        Tags { "RenderType"="Opaque" }
        LOD 200

        CGPROGRAM
        fixed _AlphaCut;

        // Physically based Standard lighting model, and enable shadows on all light types
        #pragma surface surf Standard  addshadow

        // Use shader model 3.0 target, to get nicer looking lighting
        #pragma target 3.0

        sampler2D _MainTex,_BumpMap,_MaskTex,_NoisTex;
        float4 _NoisTex_ST;

        struct Input
        {
            float2 uv_MainTex;
            float2 uv_BumpMap;
            float2 uv_MaskTex;
            fixed face :  VFACE;
            float2 uv2 : TEXCOORD1;
            float3 worldPos;
            float3 vertexColor:COLOR;
        };

        half _Glossiness;
        half _Metallic;
        fixed4 _Color,_OccColor,_TreeCol1,_TreeCol2;

        // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
        // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
        // #pragma instancing_options assumeuniformscaling
        UNITY_INSTANCING_BUFFER_START(Props)
             //UNITY_DEFINE_INSTANCED_PROP(float4, _WorldPointPos)
        UNITY_INSTANCING_BUFFER_END(Props)

        void surf (Input IN, inout SurfaceOutputStandard o)
        {
            // Albedo comes from a texture tinted by color
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            clip(c.a-_AlphaCut); 
          
            //float4 point=UNITY_ACCESS_INSTANCED_PROP(Props, _WorldPointPos);
            fixed colfactor = tex2D(_NoisTex,IN.worldPos.xz*_NoisTex_ST.xy+_NoisTex_ST.zw).r;
            fixed3 worldcol = lerp(_TreeCol1.rgb,_TreeCol2.rgb,colfactor);
            // Metallic and smoothness come from slider variables
            o.Normal = UnpackNormal (tex2D (_BumpMap, IN.uv_BumpMap));
            o.Normal = IN.face?o.Normal:-o.Normal;
            fixed4 mask = tex2D (_MaskTex, IN.uv_MaskTex);
            fixed3 acc = lerp(_OccColor.rgb,fixed3(1,1,1),IN.vertexColor.g);
            fixed3 updowCol = lerp(_TreeCol1.rgb,_TreeCol2.rgb,IN.worldPos.y/30);
            o.Albedo = c.rgb*acc*_Color*worldcol*updowCol;

            //o.Albedo=colfactor;

            o.Metallic = _Metallic*mask.r;
            o.Smoothness = _Glossiness*mask.a;
            o.Alpha = c.a;
        }
        ENDCG
    }
    FallBack "Diffuse"
}