SlateRotatedRect.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Layout/SlateRect.h"
#include "Math/TransformCalculus.h"
#include "Math/TransformCalculus2D.h"
#include "Math/Vector2D.h"
#include "Rendering/SlateLayoutTransform.h"
#include "Rendering/SlateRenderTransform.h"
#include "Types/SlateVector2.h"
 
struct FSlateRotatedRect
{
public:
    FSlateRotatedRect() {}
 
    explicit FSlateRotatedRect(const FSlateRect& AlignedRect)
        : TopLeft(AlignedRect.Left, AlignedRect.Top)
        , ExtentX(AlignedRect.Right - AlignedRect.Left, 0.0f)
        , ExtentY(0.0f, AlignedRect.Bottom - AlignedRect.Top)
    {
    }
 
    FSlateRotatedRect(const UE::Slate::FDeprecateVector2DParameter& InTopLeft, const UE::Slate::FDeprecateVector2DParameter& InExtentX, const UE::Slate::FDeprecateVector2DParameter& InExtentY)
        : TopLeft(InTopLeft)
        , ExtentX(InExtentX)
        , ExtentY(InExtentY)
    {
    }
 
public:
 
    FVector2f TopLeft;
    FVector2f ExtentX;
    FVector2f ExtentY;
 
public:
    bool operator == (const FSlateRotatedRect& Other) const
    {
        return
            TopLeft == Other.TopLeft &&
            ExtentX == Other.ExtentX &&
            ExtentY == Other.ExtentY;
    }
 
public:
 
    SLATECORE_API FSlateRect ToBoundingRect() const;
 
    SLATECORE_API bool IsUnderLocation(const UE::Slate::FDeprecateVector2DParameter Location) const;
 
    static FSlateRotatedRect MakeRotatedRect(const FSlateRect& ClipRectInLayoutWindowSpace, const FSlateLayoutTransform& InverseLayoutTransform, const FSlateRenderTransform& RenderTransform)
    {
        return MakeRotatedRect(ClipRectInLayoutWindowSpace, Concatenate(InverseLayoutTransform, RenderTransform));
    }
 
    static SLATECORE_API FSlateRotatedRect MakeRotatedRect(const FSlateRect& ClipRectInLayoutWindowSpace, const FTransform2f& LayoutToRenderTransform);
 
    static FSlateRotatedRect MakeSnappedRotatedRect(const FSlateRect& ClipRectInLayoutWindowSpace, const FSlateLayoutTransform& InverseLayoutTransform, const FSlateRenderTransform& RenderTransform)
    {
        return MakeSnappedRotatedRect(ClipRectInLayoutWindowSpace, Concatenate(InverseLayoutTransform, RenderTransform));
    }
 
    static SLATECORE_API FSlateRotatedRect MakeSnappedRotatedRect(const FSlateRect& ClipRectInLayoutWindowSpace, const FTransform2f& LayoutToRenderTransform);
};
 
template <typename TransformType>
FSlateRotatedRect TransformRect(const TransformType& Transform, const FSlateRotatedRect& Rect)
{
    return FSlateRotatedRect
    (
        TransformPoint(Transform, Rect.TopLeft),
        TransformVector(Transform, Rect.ExtentX),
        TransformVector(Transform, Rect.ExtentY)
    );
}