snakeview.cpp

贪吃蛇程序,交给朋友的,有部分错误有待修改.

// SnakeView.cpp : implementation of the CSnakeView class
//

#include "stdafx.h"
#include "Snake.h"

#include "SnakeDoc.h"
#include "SnakeView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CSnakeView

IMPLEMENT_DYNCREATE(CSnakeView, CView)

BEGIN_MESSAGE_MAP(CSnakeView, CView)
	//{{AFX_MSG_MAP(CSnakeView)
	ON_COMMAND(ID_GAME_START, OnGameStart)
	ON_WM_KEYDOWN()
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSnakeView construction/destruction

CSnakeView::CSnakeView()
{
	// TODO: add construction code here
IniGame();
}

CSnakeView::~CSnakeView()
{
}
void CSnakeView::IniAim()
{
int uX,uY;//目标位置
while(1)
{
uX=rand()% m_nHeight;
uY=rand()% m_nWidth;
int uTag=0;//0--不与蛇身重合，1——重合
for(int i=0;i<=m_aBody.GetUpperBound();i++)
{
CPoint uPoint=m_aBody.GetAt(i);
if(uPoint.x==uX||uPoint.y==uY)//目标与蛇身重合
{
uTag=1;
break;
}
}
if(uTag==0)
break;
}
m_pAim=CPoint(uX,uY);//产生的目标存放在成员变量中
}
void CSnakeView::IniGame()
{
//改函数对游戏初始化，定义游戏的初始状态
m_nLeft=20;
m_nTop=20;
m_nWidth=40;
m_nHeight=30;
m_nSize=10;
//游戏初始状态
m_nGameStatus=0;
m_nDirect=1;
m_nCount=0;
//初始化蛇身
m_aBody.RemoveAll();
m_aBody.Add(CPoint(2,7));
m_aBody.Add(CPoint(2,6));
m_aBody.Add(CPoint(2,5));
m_aBody.Add(CPoint(2,4));
//计时器清零
m_nTime=0;
m_nTime1=0;
//初始化随机数发生器
srand((unsigned)time(NULL));
//产生一个目标
IniAim();
}
//刷新游戏区域中pPoint处的一个小方格
void CSnakeView::ReDisplay(CPoint pPoint)
{
InvalidateRect(CRect(m_nLeft+pPoint.y*m_nSize,m_nTop+pPoint.x*m_nSize,
m_nLeft+(pPoint.y+1)*m_nSize,m_nTop+(pPoint.x+1)*m_nSize));
}
BOOL CSnakeView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CSnakeView drawing

void CSnakeView::OnDraw(CDC* pDC)
{
	CSnakeDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	pDC->SelectStockObject(WHITE_BRUSH);
pDC->Rectangle(CRect(m_nLeft-1,m_nTop-1,m_nLeft+m_nWidth*m_nSize+1,
m_nTop+m_nHeight*m_nSize+1));
//显示当前用时
CString uStr;
uStr.Format("当前用时：%d",m_nTime);
pDC->TextOut(m_nLeft+m_nWidth*m_nSize+30,40,uStr);
//显示当前得分
uStr.Format("当前得分：%d",m_nCount);
pDC->TextOut(m_nLeft+m_nWidth*m_nSize+30,140,uStr);
//显示目标
pDC->SelectStockObject(LTGRAY_BRUSH);
pDC->Rectangle(CRect(m_nLeft+m_pAim.y*m_nSize,m_nTop+m_pAim.x*m_nSize,m_nLeft+(m_pAim.y+1)*m_nSize,m_nTop+(m_pAim.x+1)*m_nSize));
//画蛇
for(int i=0;i<=m_aBody.GetUpperBound();i++)
{
    CPoint uPoint=m_aBody.GetAt(i);
    pDC->Rectangle(CRect(m_nLeft+uPoint.y*m_nSize,m_nTop+uPoint.x*m_nSize,m_nLeft+(uPoint.y+1)*m_nSize,m_nTop+(uPoint.x+1)*m_nSize));
}
}


/////////////////////////////////////////////////////////////////////////////
// CSnakeView printing

BOOL CSnakeView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CSnakeView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CSnakeView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CSnakeView diagnostics

#ifdef _DEBUG
void CSnakeView::AssertValid() const
{
	CView::AssertValid();
}

void CSnakeView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CSnakeDoc* CSnakeView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CSnakeDoc)));
	return (CSnakeDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CSnakeView message handlers

void CSnakeView::OnGameStart() 
{
	// TODO: Add your command handler code here
//启动游戏，启动定时器
IniGame();
m_nGameStatus=1;
SetTimer(1,100,NULL);
Invalidate();	
}

void CSnakeView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default
	switch(nChar)
{
case 38:
m_nDirect=4;
break;
case 40:
m_nDirect=3;
break;
case 37:
m_nDirect=2;
break;
case 39:
m_nDirect=1;
break;

}
CView::OnKeyDown(nChar,nRepCnt,nFlags);	
}

void CSnakeView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
m_nTime1++;           //计时
if(m_nTime1==10)      //达到1秒
{
m_nTime++;
m_nTime1=0;
Invalidate();
}
CPoint uPoint=m_aBody.GetAt(0);        //蛇头的位置
int uTag=0;                            //是否失败

switch(m_nDirect)                      //判断下一步蛇是否出界
{
case 1://right
uPoint.y++;
if(uPoint.y>=m_nWidth)
uTag=1;
break;
case 2://left
uPoint.y--;
if(uPoint.y<0)
uTag=1;
break;
case 3://down
uPoint.x++;
if(uPoint.x>=m_nHeight)
uTag=1;
break;
case 4://up
uPoint.x--;
if(uPoint.x<0)
uTag=1;
break;
}
if(uTag==0)
{
for(int i=0;i<=m_aBody.GetUpperBound();i++)
{
CPoint uPoint1=m_aBody.GetAt(i);
if(uPoint1.x==uPoint.x&&uPoint1.y==uPoint.y)
{
uTag=1;
break;
}
}
}
if(uTag==0)
{
m_aBody.InsertAt(0,uPoint);                 //新的蛇头的位置
ReDisplay(uPoint);

if(uPoint.x==m_pAim.x && uPoint.y==m_pAim.y)  //碰上目标
{
m_nCount++;
IniAim();
Invalidate();
}
else
{
CPoint uPoint1=m_aBody.GetAt(m_aBody.GetUpperBound());
m_aBody.RemoveAt(m_aBody.GetUpperBound());
ReDisplay(uPoint1);
}
}
else
{
KillTimer(1);
AfxMessageBox("Fail!!!");
}
CView::OnTimer(nIDEvent);
}