Layout code for radial menu complete.

Source/Integration/RadialMenu.h

@@ -30,31 +30,48 @@ public:
     void Configure(int32 NItems, float ItemHeight, float InnerRadius, float MinSpoke, float Spread);
 
     UFUNCTION(BlueprintCallable)
-    int32 NumItems() const { return Items.Num(); }
+    int32 LeftNum() const { return NumLeft; }
+
+    UFUNCTION(BlueprintCallable)
+    int32 RightNum() const { return NumRight; }
 
     UFUNCTION(BlueprintCallable)
     const TArray<FRadialMenuItem> GetItems() const { return Items; }
 
-    TArray<FRadialMenuItem> Items;
 
 private:
     using View = TArrayView<FRadialMenuItem>;
 
-    void CalculateSide(View V);
+    // Give the unit vector for the selected spoke. NSide is
+    // the number of spokes on the side of the wheel that
+    // we're calculating, and NTotal is the total number of
+    // spokes on both sides. The spokes on a given side are
+    // organized top-to-bottom, and the angle between the
+    // spokes is always equal to (1/NTotal) of the circle.
+    FVector2D SpokeVector(int32 I, int32 NSide, int32 NTotal);
+
+    // Populate Point1 and Point2, these are the
+    // endpoints of the spoke segment.  Spokes are
+    // designed to always be long enough to make room
+    // for MinSpoke, but also to make enough room to
+    // keep the menu items from overlapping.
+    void CalculateSpokes(View V, float ItemHeight, float InnerRadius, float MinSpoke);
+    
+    // Search for the widest spoke, and return its X coordinate.
+    double WidestSpoke(View V);
+
+    // Populate Point3, this is the endpoint of the spread
+    // line that goes horizontal.
+    void CalculateSpread(View V, double Offset);
+
+    // Flip everything in the specified view horizontally.
     void FlipHorizontal(View V);
 
-    // The half-circle is divided into pie slices.  Returns a direction vector
-    // which aims directly down the center of the pie slice.
-    FVector2D PieSliceToVector(double Slice, double Slices);
-    
-    int32 CNItems = 0;
-    float CItemHeight = 0;
-    float CInnerRadius = 0;
-    float CMinSpoke = 0;
-    float CSpread = 0;
-    int32 CNumLeft = 0;
-    int32 CNumRight = 0;
-    View LeftItems;
-    View RightItems;
+    // The array of items.
+    TArray<FRadialMenuItem> Items;
+
+    // Number of items on the left, and on the right.
+    int32 NumLeft = 0;
+    int32 NumRight = 0;
 };