dl_coor.h

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#pragma once
 
#include "dl_type.h"
 
namespace dl
{
class Coor
{
    friend class Factory;
    friend class VK;
public:
    static Coor* Create(Coor* parent = nullptr);
 
    Coor* Clone();
 
    void DtPosition(const Position& dt);
    void DtScale(const Position& dt);
    void DtScale(Float dt);
    void DtRotate(Float dt);

    void SetPosition(const Position& pos);
    void SetScale(const Position& scale);
    void SetScale(Float scale)
    {
        SetScale({ scale, scale });
    }
    void SetRotate(Float rotate);
 
    void SetParent(Coor* coor);
 
    Position GetPosition() const;
    Position GetScale() const;
    Float GetRotate() const;
 
    Coor* GetParent() const;
    Position ThisToWorld(Position pos) const;

    Position ThisToParent(Position pos) const;

    Position WorldToThis(Position pos) const;

    Position ParentToThis(Position pos) const;

    Position ThisToRoot(Position pos) const;

    Coor* GetRoot();

    int GetRootIndex()
    {
        return _rootIndex;
    }
 
    ~Coor()
    {
        assert(_rootIndex == -1);
    }
private:
    Coor() :
        _position{},
        _scale{ 1.0f, 1.0f },
        _rotate{},
        _cosR{ 1.0f },
        _sinRNag{ 0 },
        _parent{ nullptr },
        _rootIndex{ -1 }
    {
    }
    Position _position;
    Position _scale;
    Float _rotate;
    Float _cosR;
    Float _sinRNag;
    int _rootIndex; // 非-1是根坐标系，根坐标系parent必须为nullptr
    Coor* _parent;      // 为nullptr时代表窗口坐标系
};
 
}