ShapeRecognizer.h

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// Copyright Lost in Game Studio. All Rights Reserved.
 
#pragma once
 
#include "VirtualShape/VirtualShape.h"
#include "TouchInterfaceListener.h"
#include "ShapeRecognizer.generated.h"
 
class UVirtualShape;
 
struct FDrawing
{
    FVector2D StartPosition;
    FVector2D EndPosition;
    FVector2D Direction;
    
    float Length;
    
    uint8 bHasDirection:1;
    
    FDrawing()
    : StartPosition(ForceInitToZero)
    , EndPosition(ForceInitToZero)
    , Direction(ForceInitToZero)
    , Length(0.0f)
    , bHasDirection(false)
    {
        
    }
    
    explicit FDrawing(const FVector2D InPosition)
    : StartPosition(InPosition)
    , EndPosition(ForceInitToZero)
    , Direction(ForceInitToZero)
    , Length(0.0f)
    , bHasDirection(false)
    {
        
    }
};
 
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnShapeDetectionSuccessSignature, const UVirtualShape*, Asset);
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnShapeDetectionFailedSignature); //Todo: Add reason
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnDrawState);

UCLASS(ClassGroup=(TouchInterfaceDesigner), meta=(BlueprintSpawnableComponent))
class TOUCHINTERFACE_API UShapeRecognizer : public UTouchInterfaceListener
{
    GENERATED_BODY()
 
public:
    UShapeRecognizer();
 
protected:
    virtual void BeginPlay() override;
 
public:
    virtual bool OnTouchStarted(const int32 FingerIndex, const FVector2D Location) override;
    virtual void OnTouchMoved(const int32 FingerIndex, const FVector2D Location) override;
    virtual void OnTouchEnded(const int32 FingerIndex, const FVector2D Location) override;
    
    virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
 
    virtual void HandleOnOrientationChanged() override;
 
    //Todo: Add/Remove shape

    bool RestrictRecognizerToShapeByName(const FName VirtualShapeName);

    void RestrictRecognizerToShapeByAsset(const UVirtualShape* InVirtualShape);
 
    void ClearRecognizerRestriction() { RestrictedVirtualShapeName = NAME_None; }
 
    //Todo: Show/Hide guide

    UFUNCTION(Category="Shape Recognizer", BlueprintCallable)
    virtual void TryRecognizeShape();
 
    UFUNCTION(Category="Shape Recognizer", BlueprintCallable)
    virtual void DeleteUserDrawing();
 
protected:
    // Called at the end of user drawing to recognize shape
    virtual void Compute();
 
    // Try to recognize the shape while the user is drawing (partial data)
    virtual void PredictiveCompute();
 
    virtual void ClearData();
 
    
public:
    UPROPERTY(Category="Shape Recognizer|Events", BlueprintAssignable)
    FOnDrawState OnDrawBegin;

    UPROPERTY(Category="Shape Recognizer|Events", BlueprintAssignable)
    FOnDrawState OnDrawEnd;
    
private:
    //Shape you want that this manager recognize
    UPROPERTY(Category="Shape", EditAnywhere, BlueprintReadOnly, meta=(AllowPrivateAccess="true"))
    TArray<UVirtualShape*> VirtualShapes;
    
    //UPROPERTY(Category="Shape", EditAnywhere, BlueprintReadOnly, meta=(AllowPrivateAccess="true"))
    //uint8 bCloseShape:1;
 
    UPROPERTY(Category="Shape", EditAnywhere, BlueprintReadOnly, meta=(AllowPrivateAccess="true"))
    float MaxCloseDistance;
 
    //UPROPERTY(Category="Shape", EditAnywhere, BlueprintReadOnly, meta=(AllowPrivateAccess="true"))
    //uint8 bPredictiveDetection:1;
    
    //TODO: Cleaner here instead of each virtual shape
 
    UPROPERTY(Category="Shape", BlueprintAssignable)
    FOnShapeDetectionSuccessSignature OnShapeDetectionSuccess;
 
    UPROPERTY(Category="Shape", BlueprintAssignable)
    FOnShapeDetectionFailedSignature OnShapeDetectionFailed;
 
    uint8 bRestricted:1;
 
    //UVirtualShape* RestrictedVirtualShape;
    FName RestrictedVirtualShapeName;
    
    TArray<FDrawData> UserDrawing;
    TArray<FDrawData> DotData;
 
    float ShapeDotDistance;
 
    uint8 bIsComputing:1;
    uint8 bIsDrawing:1;
    uint8 bLaunchTimer:1;
    
    FTimerHandle ComputeTimer;
    
    FVector2D PreviousDotPosition;
};