Update

Source/FLESHEditor/Public/MatrixInputWidget.h

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+#pragma once
+
+#include "CoreMinimal.h"
+#include "Widgets/SCompoundWidget.h"
+#include "Widgets/Input/SNumericEntryBox.h"
+#include "Widgets/Input/SButton.h"
+#include "Widgets/Layout/SBox.h"
+#include "Widgets/Layout/SGridPanel.h"
+
+/**
+ * Matrix input widget for the FLESH editor
+ * Allows inputting transformation matrices for precise cutting operations
+ */
+class FLESHEDITOR_API SMatrixInputWidget : public SCompoundWidget
+{
+public:
+    SLATE_BEGIN_ARGS(SMatrixInputWidget)
+        : _Matrix(FMatrix::Identity)
+        , _OnMatrixChanged()
+    {}
+        /** The initial matrix value */
+        SLATE_ARGUMENT(FMatrix, Matrix)
+        /** Called when the matrix value changes */
+        SLATE_EVENT(FOnMatrixChanged, OnMatrixChanged)
+    SLATE_END_ARGS()
+
+    /** Constructs this widget */
+    void Construct(const FArguments& InArgs);
+
+    /** Sets the matrix value */
+    void SetMatrix(const FMatrix& InMatrix);
+
+    /** Gets the current matrix value */
+    FMatrix GetMatrix() const;
+
+    /** Resets the matrix to identity */
+    void ResetToIdentity();
+
+    /** Creates a rotation matrix from Euler angles */
+    void SetFromEulerAngles(float Roll, float Pitch, float Yaw);
+
+    /** Creates a translation matrix */
+    void SetFromTranslation(const FVector& Translation);
+
+    /** Creates a combined transformation matrix */
+    void SetFromTransform(const FTransform& Transform);
+
+private:
+    /** The current matrix value */
+    FMatrix Matrix;
+
+    /** Called when the matrix value changes */
+    FOnMatrixChanged OnMatrixChanged;
+
+    /** The grid panel containing the matrix elements */
+    TSharedPtr<SGridPanel> GridPanel;
+
+    /** Array of numeric entry boxes for matrix elements */
+    TArray<TSharedPtr<SNumericEntryBox<float>>> NumericEntryBoxes;
+
+    /** Creates a numeric entry box for a matrix element */
+    TSharedPtr<SNumericEntryBox<float>> CreateMatrixElementWidget(int32 Row, int32 Col);
+
+    /** Called when a matrix element changes */
+    void OnMatrixElementChanged(float NewValue, int32 Row, int32 Col);
+
+    /** Updates the UI from the matrix value */
+    void UpdateUI();
+};
+
+/** Delegate for matrix value changes */
+DECLARE_DELEGATE_OneParam(FOnMatrixChanged, const FMatrix&);