//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGObject.h
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   类的声明 几何实体抽象基类
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _TGOBJECT_H_
#define _TGOBJECT_H_

#ifndef _TWRUNTIMECLASS_H_
#include "TWRunTimeClass.h"
#endif

#ifndef _TWFLAG_H_
#include "TWFlag.h"
#endif

#ifndef _TPGECOORDSYS_H_
#include "TPGeCoordSys.h"
#endif

#ifndef _TGPOINT_H_
#include "TGPoint.h"
#endif

class TPGeExtend2D;
class TPGeExtend3D;
class TGMatrix;
class TGObjectList;

class GEOAPI TGObject : public TWRunTimeClass, public TWFlag
{
	DECLARE_RUN_TIME_CLASS(TGObject)
public:
	bool operator > (const TGObject&obj) const;
	bool operator < (const TGObject&obj) const;

	virtual ~TGObject();
	//实体有效性,如果非特殊说明，对实体的所有函数调用必须满足实体有效!
	virtual bool IsValid() const;

	virtual TGObject * Clone() const;

	//坐标变换
	virtual void TransformBy(const TGMatrix& pMatrix);

	virtual bool Explode(TGObjectList& res) const;
	//求交,禁止TGObject2D与TGObject3D混合运算!
	//须满足操作顺序可交换规则!结果可能出现冗余
	//此处实现了复合实体与其它实体的分解后求交
	//子类中，基本实体与基本实体的求交一定要重载，基本实体与复杂实体的求交一般要反向进行
	virtual bool Intersect(const TGObject&obj,TGObjectList& res) const;	

	//此处实现了对复合实体的包含判断(分解之后对子实体进行判断)
	//子类中对基本实体的包含判断要重载	
	//包含判断,禁止TGObject2D与TGObject3D混合运算!
	virtual bool IsInclude(const TGObject&obj) const;

	//此处实现了复合实体的点包含测试(GR_IN/GR_OUT),基本实体类要重载
	//点相对集合的关系判断,要求最少包含判断GR_IN/GR_OUT
	virtual GRelation HitTest(const TGPoint&pt) const;

	//此处实现了复合实体的取包围盒,基本实体类要重载
	//无包围盒返回false
	virtual bool GetExtend2D(TPGeExtend2D& pExt) const;

	//此处实现了复合实体的取包围盒,基本实体类要重载
	//无包围盒返回false
	virtual bool GetExtend3D(TPGeExtend3D& pExt) const;
	
	//如果ECS与WCS不重合，返回实体坐标系且return true
	virtual bool GetEcs(TPGeCoordSys&ecs) const;

	//采样测试点,不取端点、节点之类的不光滑点!
	virtual TGPoint GetSamplePoint() const;

	//图形输出，调试用
	virtual void Output(int color) const;

	//operate
	//一直分解为基本实体,如果是基本实体，将取得其拷贝
	void ExplodeEx(TGObjectList& pRes) const;

	void TransEcs(TGObject* pObj) const;
	void TransWcs(TGObject* pObj) const;
	
	bool IsExtendInter(const TPGeExtend2D& pExt) const;
	bool IsExtendInter(const TPGeExtend3D& pExt) const;

	typedef void (*OutputGObject)(const TGObject *pObject,int color);
	static OutputGObject s_pOutputFun;
};


#endif