tree3dlg.cpp

分形数程序源代码

// tree3Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "tree3.h"
#include "tree3Dlg.h"
#include <math.h>
#define PI 3.1415926/180
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CTree3Dlg dialog

CTree3Dlg::CTree3Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTree3Dlg::IDD, pParent)
{
	
	//{{AFX_DATA_INIT(CTree3Dlg)
		// 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 CTree3Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTree3Dlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTree3Dlg, CDialog)
	//{{AFX_MSG_MAP(CTree3Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTree3Dlg message handlers

BOOL CTree3Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

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

// 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 CTree3Dlg::OnPaint() 
{
		AfxGetMainWnd()->SetWindowText("分形树（分形频道：fractal.cn）2004    请单击窗体");
	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;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CPaintDC dc(this);
		CPen pen1(PS_SOLID,1,RGB(0,255,0));
		dc.SelectObject(pen1);
		dc.MoveTo(m_point.x-50,m_point.y-50);
		dc.LineTo(m_point.x-50,m_point.y-50+120);	
		drawTree(m_point.x - 50, m_point.y - 50, 50, -90, 1, dc);
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CTree3Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CTree3Dlg::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default

	m_point = point;
	Invalidate();
}


void CTree3Dlg::drawTree(int x, int y, int L, int a, int tt, CDC& dc)
{
	CPen pen1(PS_SOLID,1,RGB(255,0,0));
	CPen pen2(PS_SOLID,1,RGB(0,255,0));

	int X1,Y1,i;
	for( i = -1;i<=1;i++)
	{
		X1 = x + L * cos((a + i * ((float(rand())/RAND_MAX * 40) + 20)) * PI);
		Y1 = y + L * sin((a + i * ((float(rand())/RAND_MAX * 40) + 20)) * PI);
		dc.SelectObject(pen2);
		dc.MoveTo(x, y);
		dc.LineTo(X1, Y1);
		if(L>10)
			drawTree(X1, Y1, L - 8, a + i * (float(rand())/RAND_MAX * 40) + 10, tt, dc);
        else if(tt == 1)
		{
			dc.SelectObject(pen1);
			dc.Ellipse(X1-2, Y1-2,X1+2,Y1+2);
			dc.SelectObject(pen2);
		}
      
	}
}