Shader "DeMuenu/World/Hoppou/RevealStandart"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _MultTex ("Multiply Texture", 2D) = "white" {}
        _MultiplicatorTex ("Multiply Texture Strength", Range(0,3)) = 0
        _Color ("Color", Color) = (1,1,1,1)

        _EmmisiveText ("Emmissive Texture", 2D) = "white" {}
        _EmmissiveColor ("Emmissive Color", Color) = (1,1,1,1)
        _EmmissiveStrength ("Emmissive Strength", Range(0,10)) = 0

        
        //MoonsLight
        _InverseSqareMultiplier ("Inverse Square Multiplier", Float) = 1
        _LightCutoffDistance ("Light Cutoff Distance", Float) = 100
        //MoonsLight END



    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"
            #include "Includes/LightStrength.hlsl"

            //MoonsLight Defines
            #define MAX_LIGHTS 80 // >= maxPlayers in script
            //MoonsLight Defines END

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
                float3 normal : NORMAL;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float2 uv2 : TEXCOORD1;
                float2 uvEmmis : TEXCOORD4;
                //UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;

                //MoonsLight
                float3 worldPos : TEXCOORD2;
                float3 worldNormal: TEXCOORD3;

                //MoonsLight END

                
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            sampler2D _MultTex;
            float4 _MultTex_ST;
            float _MultiplicatorTex;
            float4 _Color;


            sampler2D _EmmisiveText;
            float4 _EmmisiveText_ST;
            float4 _EmmissiveColor;
            float _EmmissiveStrength;


            //MoonsLight variables
            float _InverseSqareMultiplier;
            float _LightCutoffDistance;            

            float4 _LightPositions[MAX_LIGHTS]; // xyz = position
            float4 _LightColors[MAX_LIGHTS]; // xyz = position
            float4 _LightDirections[MAX_LIGHTS]; // xyz = direction, w = cos(halfAngle)
            float _LightType[MAX_LIGHTS]; // 0 = sphere, 1 = cone
            float  _PlayerCount;                  // set via SetFloat
            //MoonsLight variables END


            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                o.uv2 = TRANSFORM_TEX(v.uv, _MultTex);
                o.uvEmmis = TRANSFORM_TEX(v.uv, _EmmisiveText);


                //MoonsLight Vertex
                float4 wp = mul(unity_ObjectToWorld, v.vertex);
                o.worldPos = wp.xyz;
                o.worldNormal = UnityObjectToWorldNormal(v.normal);
                //MoonsLight Vertex END
                
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 col = tex2D(_MainTex, i.uv);
                fixed4 mult = tex2D(_MultTex, i.uv2);
                col = lerp(col,  mult, _MultiplicatorTex);
                fixed4 emmis = tex2D(_EmmisiveText, i.uvEmmis);


                //MoonsLight
                int count = (int)_PlayerCount;

                float3 N = normalize(i.worldNormal); //for lambertian diffuse
                // Example: compute distance to nearest player
                float4 dmax = float4(0,0,0,1);
                float dIntensity = 0;
                [loop]
                for (int LightCounter = 0; LightCounter < MAX_LIGHTS; LightCounter++)
                {
                    if (LightCounter >= count) break;
                    float3 Lightposition = _LightPositions[LightCounter].xyz;

                    float distanceFromLight = length(i.worldPos - Lightposition);
                    if (distanceFromLight > _LightCutoffDistance) continue;
                    
                    float sd = 0.0;
                    float contrib = 0.0;
                    

                    float invSqMul = max(1e-4, _InverseSqareMultiplier);
                    

                    //Lambertian diffuse
                    float3 L = normalize(Lightposition - i.worldPos);   // Lightposition = light position
                    float  NdotL = saturate(dot(N, L) * 0.5 + 0.5);      // one-sided Lambert
                    if (NdotL <= 0) continue;

                    LightTypeCalculations(_LightColors, LightCounter, i, NdotL, dIntensity, _LightPositions[LightCounter].a, _LightPositions[LightCounter].xyz);



                    dmax = dmax + contrib * float4(LightColor, 1) * NdotL; // accumulate light contributions

                    


                }
                
                //dmax.xyz = min(dmax * dIntensity, 1.0);
                dmax.w = 1.0;
                dmax = dmax;


                //MoonsLight END


                return col * _Color * dmax + emmis * _EmmissiveStrength * _EmmissiveColor;
            }
            ENDCG
        }
    }

    FallBack "Diffuse"
}