Transform.h

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#pragma once
 
#include "Vec3.h"
#include "Mat4.h"
 
class Transform
{
public:
    Transform();
 
    Transform(const Vec3 &position); 
    Transform(const Vec3 &position, const Vec3 &rotation, const Vec3 &scale);
 
    // Getters
    const Vec3 &GetPosition() const { return m_Position; }
    const Vec3 &GetRotation() const { return m_Rotation; }
    const Vec3 &GetScale() const { return m_Scale; }
    const Vec3 &GetPivot() const { return m_Pivot; }
 
    // Setters
    void SetPosition(const Vec3 &position);
    void SetRotation(const Vec3 &rotation);
    void SetScale(const Vec3 &scale);
    void SetScale(float uniformScale);
    void SetPivot(const Vec3 &pivot);
    void SetMeshCenter(const Vec3 &meshCenter);
 
    void SetRelativePivot(const Vec3 &meshCenter, const Vec3 &relativePivot = Vec3(0.0f, 0.0f, 0.0f));
 
    // Transformation operations
    void Translate(const Vec3 &translation);
    void Rotate(const Vec3 &rotation);
    void Scale(const Vec3 &scale);
    void Scale(float uniformScale);
 
    // Local space transformation operations
    void TranslateLocal(const Vec3 &localTranslation);
 
    void TranslateLocalX(float distance);
 
    void TranslateLocalY(float distance);
 
    void TranslateLocalZ(float distance);
 
    Vec3 GetLocalRight() const;
 
    Vec3 GetLocalUp() const;
 
    Vec3 GetLocalForward() const;
 
    Mat4 GetMatrix() const;
 
    Mat4 GetInverseMatrix() const;
 
    void Reset();
 
private:
    Vec3 m_Position{0.0f, 0.0f, 0.0f};
    Vec3 m_Rotation{0.0f, 0.0f, 0.0f}; // Euler angles in degrees
    Vec3 m_Scale{1.0f, 1.0f, 1.0f};
    Vec3 m_Pivot{0.0f, 0.0f, 0.0f};      // Relative pivot offset from mesh center
    Vec3 m_MeshCenter{0.0f, 0.0f, 0.0f}; // Center of the mesh
 
    mutable Mat4 m_CachedMatrix;
    mutable bool m_MatrixDirty = true;
 
    void InvalidateMatrix() const { m_MatrixDirty = true; }
    void UpdateMatrix() const;
};