hw4_4view.h

给定四个点绘制图4-30所示的不同转角的两个正方形

// hw4_4View.h : interface of the CHw4_4View class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_HW4_4VIEW_H__B186CF38_7530_4F59_9846_2DACDCD119C3__INCLUDED_)
#define AFX_HW4_4VIEW_H__B186CF38_7530_4F59_9846_2DACDCD119C3__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <math.h>
#include <list>
using namespace std;

class CHw4_4View : public CView
{
protected: // create from serialization only
	CHw4_4View();
	DECLARE_DYNCREATE(CHw4_4View)

// Attributes
public:
	CHw4_4Doc* GetDocument();

	int num;
	int y_min, y_max;

	typedef struct node
	{
		float x;
		float k_r;
		int ymax;

		node(float x1 = 0.0, float k_r1 = 0.0, int y1 = 0) : x(x1), k_r(k_r1), ymax(y1) {};
		bool operator < (const node& node1)
		{
			if (fabs(x - node1.x) < 0.000001)
				return (k_r < node1.k_r);
			else return (x < node1.x);
		}
	} node;

	list<node> AET;
	list<node> *m_ET;

// Operations
public:
	void DrawEdge(CDC *pDC, list<CPoint> &polygon, int color);
	void ScanFill(CDC *pDC, list<CPoint> &polygon, int color);

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CHw4_4View)
	public:
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	protected:
	virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
	virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
	virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CHw4_4View();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
	//{{AFX_MSG(CHw4_4View)
		// NOTE - the ClassWizard will add and remove member functions here.
		//    DO NOT EDIT what you see in these blocks of generated code !
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in hw4_4View.cpp
inline CHw4_4Doc* CHw4_4View::GetDocument()
   { return (CHw4_4Doc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_HW4_4VIEW_H__B186CF38_7530_4F59_9846_2DACDCD119C3__INCLUDED_)