61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
|
//
|
||
|
|
// This class implements the layout calculatations for a radial
|
||
|
|
// menu.
|
||
|
|
//
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "CoreMinimal.h"
|
||
|
|
#include "RadialMenu.generated.h"
|
||
|
|
|
||
|
|
|
||
|
|
USTRUCT(BlueprintType)
|
||
|
|
struct FRadialMenuItem
|
||
|
|
{
|
||
|
|
GENERATED_BODY()
|
||
|
|
|
||
|
|
FVector2D Point1 = {0,0};
|
||
|
|
FVector2D Point2 = {0,0};
|
||
|
|
FVector2D Point3 = {0,0};
|
||
|
|
bool RightSide = false;
|
||
|
|
};
|
||
|
|
|
||
|
|
UCLASS(BlueprintType)
|
||
|
|
class URadialMenu : public UObject
|
||
|
|
{
|
||
|
|
GENERATED_BODY()
|
||
|
|
|
||
|
|
public:
|
||
|
|
UFUNCTION(BlueprintCallable)
|
||
|
|
void Configure(int32 NItems, float ItemHeight, float InnerRadius, float MinSpoke, float Spread);
|
||
|
|
|
||
|
|
UFUNCTION(BlueprintCallable)
|
||
|
|
int32 NumItems() const { return Items.Num(); }
|
||
|
|
|
||
|
|
UFUNCTION(BlueprintCallable)
|
||
|
|
const TArray<FRadialMenuItem> GetItems() const { return Items; }
|
||
|
|
|
||
|
|
TArray<FRadialMenuItem> Items;
|
||
|
|
|
||
|
|
private:
|
||
|
|
using View = TArrayView<FRadialMenuItem>;
|
||
|
|
|
||
|
|
void CalculateSide(View V);
|
||
|
|
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;
|
||
|
|
};
|
||
|
|
|