Shader "Unlit/HeatTest"
{
    Properties
    {
        //_MainTex ("Texture", 2D) = "white" {}
        _RampTexture ("_RampTexture", 2D) = "white" {}
        _UFtexture ("_UFtexture", 2D) = "white" {}
        _Eyetexture ("_Eyetexture", 2D) = "white" {}
        _Memorytexture ("_Memorytexture", 2D) = "white" {}
        _Emotexture ("_Emotexture", 2D) = "white" {}
        _Logictexture ("_Logictexture", 2D) = "white" {}
        _Speaktexture ("_Speaktexture", 2D) = "white" {}
        _headtexture ("_headtexture", 2D) = "white" {}
        // _Noise ("_Noise", 2D) = "white" {}
        // _BoxSize("Box Size", Vector) = (2, 1, 0, 0)
        // _Center("Center", Vector) = (0, 0, 0, 0) // 世界空间中的中心
         _Temtupre("_Temtupre", float) = 0 // 世界空间中的中心
    }
    SubShader
    {
        Tags {"Queue"="Transparent" "RenderType"="Transparent"}
        Blend SrcAlpha OneMinusSrcAlpha  // 设置混合模式为标准透明
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                //float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
                float3 worldPos : TEXCOORD0; // 用于传递世界空间坐标
            };

            float3 _Center; // 世界空间中心点，使用 float3
            float2 _BoxSize; // 可以调整为 float3，如果需要
            //float4 _Time;
            sampler2D _RampTexture;
            sampler2D _Noise;
            uniform float4 _Points[7];        // (x, y) = center  z = tempture
            uniform float4 _Properties[7];    // (x,y) = boxsize 

            sampler2D _UFtexture; 
            sampler2D _Eyetexture ; 
            sampler2D _Memorytexture; 
            sampler2D _Emotexture; 
            sampler2D _Logictexture ; 
            sampler2D _Speaktexture; 
            sampler2D _headtexture;
            float _Temtupre;

           inline float unity_noise_randomValue (float2 uv)
{
    return frac(sin(dot(uv, float2(12.9898, 78.233))) * 43758.5453);
}

inline float unity_noise_interpolate (float a, float b, float t)
{
    return lerp(a, b, t);
}

inline float unity_valueNoise (float2 uv)
{
    float2 i = floor(uv);
    float2 f = frac(uv);
    f = f * f * (3.0 - 2.0 * f);

    float2 c0 = i;
    float2 c1 = i + float2(1.0, 0.0);
    float2 c2 = i + float2(0.0, 1.0);
    float2 c3 = i + float2(1.0, 1.0);

    float r0 = unity_noise_randomValue(c0);
    float r1 = unity_noise_randomValue(c1);
    float r2 = unity_noise_randomValue(c2);
    float r3 = unity_noise_randomValue(c3);

    float bottom = unity_noise_interpolate(r0, r1, f.x);
    float top = unity_noise_interpolate(r2, r3, f.x);
    return unity_noise_interpolate(bottom, top, f.y);
}

float Unity_SimpleNoise(float2 UV, float Scale)
{
    float noise = 0.0;
    float amplitude = 0.5;
    float frequency = 1.0;

    // 简化循环叠加不同频率的噪波层次
    for (int i = 0; i < 3; i++)
    {
        noise += unity_valueNoise(UV * Scale * frequency) * amplitude;
        frequency *= 2.0;
        amplitude *= 0.5;
    }

    return noise;
}
float remap(float x, float a, float b, float c, float d)
{
    return c + (x - a) * (d - c) / (b - a);
}
            float GetAlphaForTexture(int j, float2 localPos)
            {
                if (j == 0)
                    return tex2D(_UFtexture, localPos).a;
                else if (j == 1)
                    return tex2D(_Eyetexture, localPos).a;
                else if (j == 2)
                    return tex2D(_Memorytexture, localPos).a;
                else if (j == 3)
                    return tex2D(_Emotexture, localPos).a;
                else if (j == 4)
                    return tex2D(_Logictexture, localPos).a;
                else if (j == 5)
                    return tex2D(_Speaktexture, localPos).a;
                return 0.0;
            }

            v2f vert (appdata v)
            {
                 v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                // 计算并传递世界空间坐标
                o.worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
                return o;
            }

fixed4 frag (v2f i) : SV_Target
            {   

                float3 worldPos = i.worldPos;
                fixed4 col = fixed4(0, 0, 0, 1); // Initial color
                bool isFind = false;


                float2 pointPos = _Points[6].xy;
                float temperature = _Points[6].z;
                float2 boxSize = _Properties[6].xy;
                float2 localPos = (worldPos.xy - pointPos) / boxSize + 0.5;
                float backalpha = tex2D(_headtexture, localPos).a;
                
                backalpha *= (temperature);
                backalpha = clamp(backalpha, 0, 1);
                backalpha = 1 - backalpha;
                //backalpha = 0.7;

                for (int j = 0; j < 6; j++)
                {
                    float2 pointPos = _Points[j].xy;
                    float temperature = _Points[j].z;
                    float2 boxSize = _Properties[j].xy;
                    float2 localPos = (worldPos.xy - pointPos) / boxSize + 0.5;
                    //float alpha = GetAlphaForTexture(j, localPos);
                 
                    if (localPos.x >= 0.0 && localPos.x <= 1.0 && localPos.y >= 0.0 && localPos.y <= 1.0)
                    {
                        isFind = true;
                        float alpha = GetAlphaForTexture(j, localPos);
                        // dis=clamp(dis, 0, backalpha);
                        alpha *= temperature;
                        alpha = clamp(alpha, 0, 1);
                        alpha = 1 - alpha;
                        alpha = clamp(alpha, 0, backalpha); 

                        // float noise = Unity_SimpleNoise(localPos * 10.0, 0.5); // 使用噪声扰动localPos
                        // alpha += noise * 0.2; // 根据噪声增加alpha值的扩散效果
                        // alpha = clamp(alpha, 0, backalpha); // 确保alpha值在合理范围内
                        // float dis=length(localPos);
                        // dis= saturate(dis); 
                        
                        fixed4 rampColor = tex2D(_RampTexture, float2(alpha, 0));
                        col = rampColor;
                    }
                }

                // If no point is found, use the default texture (headtexture)
                if (!isFind)
                {
                    float2 pointPos = _Points[6].xy;
                    float temperature = _Points[6].z;
                    float2 boxSize = _Properties[6].xy;
                    float2 localPos = (worldPos.xy - pointPos) / boxSize + 0.5;

                    if (localPos.x >= 0.0 && localPos.x <= 1.0 && localPos.y >= 0.0 && localPos.y <= 1.0)
                    {
                        float alpha = tex2D(_headtexture, localPos).a;
                        alpha *= (temperature - 0.4);
                        alpha = clamp(alpha, 0, 1);
                        alpha = 1 - alpha;
                        //alpha=bl
                        alpha=backalpha;
                        
                        fixed4 rampColor = tex2D(_RampTexture, float2(alpha, 0));
                        col = rampColor;
                    }
                }

                col.a = 0.75;
                return col;
            }

            ENDCG
        }
    }
}