GPU优化

Assets/ThemeBundles/DepartureToMultiverse/Shaders/DTM_RandomGridTube.shader

@@ -7,7 +7,8 @@ Shader "Soullies/DTM_RandomGridTube"
         [Header(Pattern Settings)]
         _PatternSize("Pattern Size (X, Y)", Vector) = (2.0, 2.0, 0, 0)
         _GridDensity("Grid Density (Quantity Multiplier)", Float) = 1.0
-        _TimeAngle("Time Angle (Speed)", Float) = 1.0
+        _BaseSpeed("Base Speed (Static)", Float) = 1.0
+        _TimeAngle("Time Angle / Offset (Dynamic)", Float) = 0.0
         
         [Header(Edge Settings)]
         _StepA("Step A", Range(0, 1)) = 0.293
@@ -27,7 +28,7 @@ Shader "Soullies/DTM_RandomGridTube"
         [Enum(UnityEngine.Rendering.BlendMode)] _SrcBlend("Src Blend", Float) = 5 // SrcAlpha
         [Enum(UnityEngine.Rendering.BlendMode)] _DstBlend("Dst Blend", Float) = 10 // OneMinusSrcAlpha
         [Enum(Off, 0, On, 1)] _ZWrite("Z Write", Float) = 0
-        [Enum(Front, Back, Off)] _CullMode("Cull Mode", Float) = 1 // Front (Inside)
+        [Enum(Front, 0, Back, 1, Off, 2)] _CullMode("Cull Mode", Float) = 1 // Front (Inside)
     }
 
     SubShader
@@ -82,6 +83,7 @@ Shader "Soullies/DTM_RandomGridTube"
                 half4 _Color0;
                 float4 _PatternSize;
                 float  _GridDensity;
+                float  _BaseSpeed;
                 float  _TimeAngle;
                 float  _StepA;
                 float  _StepB;
@@ -94,32 +96,47 @@ Shader "Soullies/DTM_RandomGridTube"
             CBUFFER_END
 
             // -------------------------------------
-            // Custom Helper Functions
-            float2 VoronoiHash(float2 p)
+            // 极限优化工具库组 (无三角函数，全MAD指令)
+            
+            // Fast 2D Hash (纯乘加与小数截断，干掉 sin)
+            float2 FastHash22(float2 p)
             {
-                p = float2(dot(p, float2(127.1, 311.7)), dot(p, float2(269.5, 183.3)));
-                return frac(sin(p) * 43758.5453);
+                float3 p3 = frac(float3(p.xyx) * float3(0.1031, 0.1030, 0.0973));
+                p3 += dot(p3, p3.yzx + 33.33);
+                return frac((p3.xx + p3.yz) * p3.zy);
             }
 
-            // Manhattan-based Voronoi optimized for Mobile URP
-            float VoronoiDistance(float2 v, float t)
+            // Extreme Optimized 4-Tap Voronoi for Mobile (从9次循环砍至4次)
+            float VoronoiDistanceFast(float2 v, float t)
             {
                 float2 n = floor(v);
                 float2 f = frac(v);
+                
+                // 象限锚定：算出像素所处方格的偏向，完美剔除背面5个不可能相邻的远格
+                float2 mg = step(0.5, f); 
+                
                 float minDist = 8.0;
 
                 UNITY_UNROLL
-                for (int j = -1; j <= 1; j++)
+                for (int j = 0; j <= 1; j++)
                 {
                     UNITY_UNROLL
-                    for (int i = -1; i <= 1; i++)
+                    for (int i = 0; i <= 1; i++)
                     {
-                        float2 g = float2((float)i, (float)j);
-                        float2 o = VoronoiHash(n + g);
-                        // Oscillating movement
-                        o = sin(t + o * 6.2831853) * 0.5 + 0.5;
+                        // 检索偏向象限的核心 4 个格子
+                        float2 g = mg + float2(i - 1.0, j - 1.0);
+                        
+                        float2 hash = FastHash22(n + g);
+                        
+                        // 剔除昂贵的 sin 并换用平滑三角波：
+                        // t * 0.1591549 即相当于 t / (2*PI) 把时间归一化到周期
+                        float2 phase = frac(t * 0.1591549 + hash);
+                        float2 tri = abs(phase * 2.0 - 1.0);       // 线性三角波 1 -> 0 -> 1
+                        float2 o = tri * tri * (3.0 - 2.0 * tri);  // 光滑三次曲线，模拟 sin 的柔顺运动
+                        
                         float2 r = f - g - o;
-                        // Manhattan distance for rectangular frames
+                        
+                        // Manhattan 曼哈顿距离
                         float d = 0.5 * (abs(r.x) + abs(r.y));
                         minDist = min(minDist, d);
                     }
@@ -177,8 +194,9 @@ Shader "Soullies/DTM_RandomGridTube"
                 // Convert adjusted angle to U coordinate
                 float u = angle * _TubeRadius;
                 
-                // V is driven by World Z to maintain seamless tiling
-                float v = input.positionWS.z;
+                // V is driven by Object Z scaled by World Scale to maintain seamless tiling and resist rotation stretching
+                float scaleZ = length(float3(unity_ObjectToWorld[0].z, unity_ObjectToWorld[1].z, unity_ObjectToWorld[2].z));
+                float v = input.positionOS.z * scaleZ;
 
                 float2 cylindricalUV = float2(u, v);
 
@@ -193,11 +211,11 @@ Shader "Soullies/DTM_RandomGridTube"
                 float s = 0.707106;
                 float2 rotatedUV = mul(scaledUV, float2x2(c, -s, s, c));
 
-                // Time driven animation
-                float t = _TimeAngle * _TimeParameters.x;
+                // Time driven animation (Base Time + Phase Offset)
+                float t = _TimeParameters.x * _BaseSpeed + _TimeAngle;
                 
-                // Voronoi mathematical noise
-                float voronoiV = VoronoiDistance(rotatedUV, t);
+                // [TA 极限计算压缩] 使用 4-Tap、零三角函数的极简数学方法，保持无限分辨率。
+                float voronoiV = VoronoiDistanceFast(rotatedUV, t);
 
                 // Anti-aliased border mask computation
                 float fw = fwidth(voronoiV);