Shader "Unlit/BurObject"
{
    Properties
    {
        //_MainTex ("Texture", 2D) = "white" {}
        _Distance("Distance",Range(0,1))=1
        //_Smooth("Smooth",Range(3,15))=6
    }
    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue"="Transparent" }
        LOD 100

        Pass
        {
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
           

            #include "UnityCG.cginc"
            #include "Lighting.cginc"
            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
                float3 normal:NORMAL;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
                float3 normal : TEXCOORD1;
                float3 wpos : TEXCOORD2;
            };
            sampler2D _BurTexture;
            //sampler2D _MainTex;
            //float4 _MainTex_ST;
            float _Distance;
            //float _Smooth;
            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;//TRANSFORM_TEX(v.uv, _MainTex);
                o.normal=UnityObjectToWorldNormal(v.normal);
                o.wpos=mul(UNITY_MATRIX_M,v.vertex);
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                float2 uv=i.vertex.xy/_ScreenParams.xy;
                // sample the texture
                fixed4 col = tex2D(_BurTexture, uv);
                float d=(length(i.uv-float2(0.5,0.5))+0.5-_Distance)*20;
                d=1-saturate(1-d);

                //float3 N=normalize(i.normal);
                //float3 L=normalize(_WorldSpaceLightPos0.xyz);
                //float3 V=normalize(_WorldSpaceCameraPos.xyz-i.wpos.xyz);

                //float ndl=max(dot(N,L),0.00001);
                //float ndh=max(pow(dot(N,normalize(L+V)),8),0.00001);

                //float3 diff=ndl*_LightColor0*0.01;
                //float3 sp=ndh*ndl*unity_LightColor0*0.01;

                col.rgb= col.rgb+0.005;//+diff+sp;
                //_Value*=d;
                return float4(col.rgb,d);
            }
            ENDCG
        }
    }
}