feat(fix-system): 优化低温热力图视觉表现

Assets/Scripts/FixSystem/HeatMap/HeatMapController.cs

@@ -21,6 +21,11 @@ public class HeatMapController : MonoBehaviour
     public RectTransform imageToMove; // 需要移动的Image
     public Transform imageToRotate; // 需要旋转的Image
     [SerializeField, Min(0f)] private float fanStopDuration = 0.15f;
+    [Header("低温背景")]
+    [SerializeField] private Color coldBaseColor = new Color(0.015f, 0.075f, 0.16f, 1f);
+    [SerializeField] private Color coldHighlightColor = new Color(0.02f, 0.27f, 0.48f, 1f);
+    [SerializeField, Min(0.01f)] private float coldNoiseScale = 1.8f;
+    [SerializeField, Range(0f, 1f)] private float coldNoiseStrength = 0.45f;
     public Vector3 inPos; // Heatmap进入位置
     public Vector3 outPos; // Heatmap退出位置
 
@@ -295,6 +300,10 @@ public class HeatMapController : MonoBehaviour
         // 将数据传递给 Shader
         heatMaterial.SetVectorArray("_Points", points);
         heatMaterial.SetVectorArray("_Properties", properties);
+        heatMaterial.SetColor("_ColdBaseColor", coldBaseColor);
+        heatMaterial.SetColor("_ColdHighlightColor", coldHighlightColor);
+        heatMaterial.SetFloat("_ColdNoiseScale", coldNoiseScale);
+        heatMaterial.SetFloat("_ColdNoiseStrength", coldNoiseStrength);
     }
 
     public void SetTemptureDirect(float value)

Assets/Scripts/FixSystem/HeatMap/HeatTest.shader

@@ -11,7 +11,11 @@ Shader "Unlit/HeatTest"
         _Logictexture ("_Logictexture", 2D) = "white" {}
         _Speaktexture ("_Speaktexture", 2D) = "white" {}
         _headtexture ("_headtexture", 2D) = "white" {}
-         _Temtupre("_Temtupre", float) = 0 // 世界空间中的中心
+        _Temtupre("_Temtupre", float) = 0 // 世界空间中的中心
+        _ColdBaseColor ("Cold Base Color", Color) = (0.015, 0.075, 0.16, 1)
+        _ColdHighlightColor ("Cold Highlight Color", Color) = (0.02, 0.27, 0.48, 1)
+        _ColdNoiseScale ("Cold Noise Scale", Float) = 1.8
+        _ColdNoiseStrength ("Cold Noise Strength", Range(0, 1)) = 0.45
     }
     SubShader
     {
@@ -56,6 +60,10 @@ Shader "Unlit/HeatTest"
             sampler2D _Speaktexture; 
             sampler2D _headtexture;
             float _Temtupre;
+            fixed4 _ColdBaseColor;
+            fixed4 _ColdHighlightColor;
+            float _ColdNoiseScale;
+            float _ColdNoiseStrength;
 
            inline float unity_noise_randomValue (float2 uv)
 {
@@ -138,7 +146,11 @@ fixed4 frag (v2f i) : SV_Target
             {   
 
                 float3 worldPos = i.worldPos;
-                fixed4 col = fixed4(0, 0, 0, 1); // Initial color
+                // 热成像的无热源区域仍有环境温度，用细微流动的深蓝代替纯黑。
+                float2 coldNoiseUV = worldPos.xy + float2(_Time.y * 0.012, -_Time.y * 0.009);
+                float coldNoise = Unity_SimpleNoise(coldNoiseUV, _ColdNoiseScale);
+                float coldVariation = saturate(0.18 + coldNoise * _ColdNoiseStrength);
+                fixed4 col = lerp(_ColdBaseColor, _ColdHighlightColor, coldVariation);
                 bool isFind = false;