Fix output axes calculations. Another interesting effect

Assets/vfx-graph-gs/CrossProduct(Vector2).hlsl

@@ -1,15 +1,10 @@
 // Convert scaling vector to 4x4 transformation matrix
 // Scaling values are applied to X, Y, Z axes (sxyz.x, sxyz.y, sxyz.z)
-float4x4 ScaleToMatrix(float3 s) {
+float CrossProduct(float2 u, float2 v) {
     // Create diagonal scaling matrix
     // s.x applied to X-axis
     // s.y applied to Y-axis
     // s.z applied to Z-axis
     
-    return float4x4(
+    return u.x * v.y - u.y * v.x;
-        s.x, 0.0,  0.0, 0.0,
-        0.0,  s.y, 0.0, 0.0,
-        0.0,  0.0,  s.z, 0.0,
-        0.0,  0.0,  0.0, 1.0
-    );
 }

Assets/vfx-graph-gs/CrossProduct(Vector2).hlsl.meta

@@ -1,5 +1,5 @@
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+guid: f8f4610af7293684491e647c5387e5e4
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   externalObjects: {}
   userData: 

Assets/vfx-graph-gs/Main.unity

@@ -270,11 +270,11 @@ PrefabInstance:
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       propertyPath: m_PropertySheet.m_Float.m_Array.Array.data[0].m_Value
-      value: 1
+      value: 179.5
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       propertyPath: m_PropertySheet.m_Float.m_Array.Array.data[1].m_Value
-      value: 1
+      value: -130.2
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       propertyPath: m_PropertySheet.m_Vector3f.m_Array.Array.data[0].m_Name
@@ -310,7 +310,7 @@ PrefabInstance:
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     - target: {fileID: -774367247743995920, guid: 25c54d8c074f08447ab1c822a6a052fa, type: 3}
       propertyPath: m_Enabled
-      value: 0
+      value: 1
       objectReference: {fileID: 0}
     - target: {fileID: -364223573239433514, guid: 25c54d8c074f08447ab1c822a6a052fa, type: 3}
       propertyPath: m_LocalScale.y
@@ -362,7 +362,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 8980549144392899874, guid: 25c54d8c074f08447ab1c822a6a052fa, type: 3}
       propertyPath: m_IsActive
-      value: 0
+      value: 1
       objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
@@ -384,7 +384,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!4 &262750851
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@@ -488,7 +488,7 @@ Transform:
   m_GameObject: {fileID: 1826889287}
   serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0, y: 0, z: -10}
+  m_LocalPosition: {x: 0, y: 0, z: -5}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []

Assets/vfx-graph-gs/MatrixToAxes.hlsl

@@ -1,14 +0,0 @@
-// Extract coordinate axes from transformation matrix
-// Returns the rotation part (3x3 upper-left submatrix)
-float3x3 MatrixToAxes(float4x4 t) {
-    // Extract the 3x3 rotation submatrix from the 4x4 transformation matrix
-    // Row 0 = X-axis direction (t[0].xyz)
-    // Row 1 = Y-axis direction (t[1].xyz)
-    // Row 2 = Z-axis direction (t[2].xyz)
-    
-    return float3x3(
-        t[0].xyz, // X-axis
-        t[1].xyz, // Y-axis
-        t[2].xyz  // Z-axis
-    );
-}

Assets/vfx-graph-gs/SelectGreaterAxes.hlsl

@@ -0,0 +1,39 @@
+float cross2(float2 u, float2 v)
+{
+    return u.x * v.y - u.y * v.x;
+}
+
+float4x4 SelectGreaterAxes(
+    float4x4 axes,
+    float2 ss_x, 
+    float2 ss_y,
+    float2 ss_z) 
+{
+    float3 axis_x = axes[0].xyz;
+    float3 axis_y = axes[1].xyz;
+    float3 axis_z = axes[2].xyz;
+
+    float4x4 result = (float4x4)0;
+    
+    float area_xy = abs(cross2(ss_x, ss_y));
+    float area_xz = abs(cross2(ss_x, ss_z));
+    float area_yz = abs(cross2(ss_y, ss_z));
+
+    if (area_xy > area_xz && area_xy > area_yz) 
+    {
+        result[0].xyz = axis_x;
+        result[1].xyz = axis_y;
+    } 
+    else if (area_xz > area_xy && area_xz > area_yz)
+    {
+        result[0].xyz = axis_x;
+        result[1].xyz = axis_z;
+    }
+    else
+    {
+        result[0].xyz = axis_y;
+        result[1].xyz = axis_z;
+    }
+    
+    return result;
+}

Assets/vfx-graph-gs/SelectGreaterAxes.hlsl.meta

@@ -1,5 +1,5 @@
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