childview.cpp

一个在VC下编写的一维随机元胞自动机小程序

// ChildView.cpp : implementation of the CChildView class
//

#include "stdafx.h"
#include "ca.h"
#include "ChildView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CChildView

CChildView::CChildView()
{
}

CChildView::~CChildView()
{
}


BEGIN_MESSAGE_MAP(CChildView,CWnd )
	//{{AFX_MSG_MAP(CChildView)
	ON_WM_PAINT()
	ON_COMMAND(ID_DO_PAINT, OnDoPaint)

	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CChildView message handlers

BOOL CChildView::PreCreateWindow(CREATESTRUCT& cs) 
{
	if (!CWnd::PreCreateWindow(cs))
		return FALSE;

	cs.dwExStyle |= WS_EX_CLIENTEDGE;
	cs.style &= ~WS_BORDER;
	cs.lpszClass = AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS, 
		::LoadCursor(NULL, IDC_ARROW), HBRUSH(COLOR_WINDOW+1), NULL);

	return TRUE;
}

void CChildView::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
    AfxGetMainWnd()->SetWindowText("一维随机元胞自动机（分形频道：fractal.cn）2004");
	if(rand() < RAND_MAX/2) {
		DrawCa(&dc);
	}
	else PostMessage(WM_COMMAND, ID_PEANO_CURVE);
}


void CChildView::DrawCa(CDC *pDC)
{
	RECT rt;

	GetClientRect(&rt);

	char* status = new char[rt.right-rt.left+1];
	char* status2 = new char[rt.right-rt.left+1];


	int i,j;

	for(i=0; i < rt.right-rt.left; i++) 
	{
	
   		 status[i] = 0;
              
	     status2[i] = 0;
	}

	status++;
	status2++;

    	for(j=0; j < rt.right-rt.left; j++) 
	{
        int c=rand()%2;
		if (c==1)
        {
   		 status[j] = 1;
		 pDC->SetPixel(0, j, RGB(0xff, 0, 0xff));
		}
	}


	for(i=1; i<rt.bottom -rt.top ; i++) {
		for(j=1; j<rt.right-rt.left; j++) {
			if (status[j-1]==0 && status[j] == 0 && status[j+1] == 1)
				status2[j] = 1;
			else if (status[j-1]==1 && status[j] == 0 && status[j+1] == 0)
				status2[j] = 1;
			else status2[j] = 0;

			
            if (status2[j]) pDC->SetPixel(j, i+2, RGB(0, 0, 0));

		}
		memcpy(status-1, status2-1, rt.right-rt.left+1);
	}

	status--;
	status2--;

	delete []status;
	delete []status2;

}

void CChildView::OnDoPaint() 
{
	CDC *pDC = GetDC();

	DrawCa(pDC);

	ReleaseDC(pDC);
}