sierpinskidlg.cpp

分形程序

// SierpinskiDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Sierpinski.h"
#include "SierpinskiDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSierpinskiDlg dialog

CSierpinskiDlg::CSierpinskiDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSierpinskiDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSierpinskiDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSierpinskiDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSierpinskiDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSierpinskiDlg, CDialog)
	//{{AFX_MSG_MAP(CSierpinskiDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSierpinskiDlg message handlers

BOOL CSierpinskiDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here

	CRect rt;
	GetClientRect(rt);
	x = rt.Width() / 2;
	y = rt.Height() / 2;
	l = 300;
	inti = 0;

	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CSierpinskiDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSierpinskiDlg::OnPaint() 
{
	AfxGetMainWnd()->SetWindowText("Sierpinski三角形（分形频道：fractal.cn）2004");
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;
AfxGetMainWnd()->SetWindowText("Arboresent肺（分形频道：fractal.cn）2004");
		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{		
		
		//绘制初始三角形
		CClientDC dc(this);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		
		dc.MoveTo (int(x - l / 2), int(y + l * tan(PI / 6) / 2));
		dc.LineTo (int(x + l / 2), int(y + l * tan(PI / 6) / 2));
		
		dc.MoveTo (int(x + l / 2), int(y + l * tan(PI / 6) / 2));
		dc.LineTo (x,              int(y - l * tan(PI / 6)));
		
		dc.MoveTo (x,              int(y - l * tan(PI / 6)));
		dc.LineTo (int(x - l / 2), int(y + l * tan(PI / 6) / 2));
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CSierpinskiDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSierpinskiDlg::OnOK() 
{
	// TODO: Add extra validation here
	inti++;
	if(inti == 1 )//绘制第一级中点连成的三角形
	{
		CClientDC dc(this);
		l = l / 2;
		dc.MoveTo (int(x - l / 2), int(y - l * tan(PI / 6) / 2));
		dc.LineTo (int(x + l / 2), int(y - l * tan(PI / 6) / 2));

		dc.MoveTo (int(x + l / 2), int(y - l * tan(PI / 6) / 2));
		dc.LineTo (x,              int(y + l * tan(PI / 6)));

		dc.MoveTo (x,              int(y + l * tan(PI / 6)));
		dc.LineTo (int(x - l / 2), int(y - l * tan(PI / 6) / 2));
	}
	else//如果不是第一级，则调用sierpinski三角形递归过程
	{	
		sierpinski(x, y, l, inti);
	}
	
	//CDialog::OnOK();
}

void CSierpinskiDlg::sierpinski(int x,int y,int l,int i)
{
	if( 1 == i )
	{
		CClientDC dc(this);
		dc.MoveTo (int(x - l / 2), int(y - l * tan(PI / 6) / 2));
		dc.LineTo (int(x + l / 2), int(y - l * tan(PI / 6) / 2));

		dc.MoveTo (int(x + l / 2), int(y - l * tan(PI / 6) / 2));
		dc.LineTo (x,              int(y + l * tan(PI / 6)));

	    dc.MoveTo (x,              int(y + l * tan(PI / 6)));
		dc.LineTo (int(x - l / 2), int(y - l * tan(PI / 6) / 2));
	
	}
	else{
		for(int j=0; j<=2; j++)
		{
			sierpinski(
				int(x + sqrt(3) * l * sin(j * 2 * PI / 3) / 3),
				int(y - sqrt(3) * l * cos(j * 2 * PI / 3) / 3),
				int(l / 2),
				i - 1);
		}
	}
}