附录4:防空战游戏程序
// Example 11-5,地空战游戏程序
#include <afxwin.h>
#include "resource.h"
// 定义飞机类
class CPlane,public CObject
{
CPoint m_pointPlane; // 飞机位置
CBitmap m_bmpPlane; // 飞机图象
int m_nWidth; // 飞机图象宽
int m_nHeight; // 飞机图象高
public:
CPlane();
void ShowPlane(CDC *pDC,CDC *pMemDC,CRect Client);
CRect GetPlane(){return CRect(m_pointPlane.x,m_pointPlane.y,
m_pointPlane.x+m_nWidth,m_pointPlane.y+m_nHeight);}
void ChangePos();
void ResetPos(){m_pointPlane.x = 0;}
};
// 飞机类的成员函数
// 构造函数
CPlane::CPlane()
{
m_pointPlane = CPoint(0,50);
m_bmpPlane.LoadBitmap(IDB_PLANE);
BITMAP BM;
m_bmpPlane.GetBitmap(&BM);
m_nWidth = BM.bmWidth;
m_nHeight = BM.bmHeight;
}
// 显示飞机
void CPlane::ShowPlane(CDC *pDC,CDC *pMemDC,CRect Client)
{
pMemDC->SelectObject(&m_bmpPlane);
pDC->BitBlt(m_pointPlane.x,m_pointPlane.y,
m_nWidth,m_nHeight,pMemDC,0,0,SRCAND);
}
// 改变飞机位置
void CPlane::ChangePos()
{
if(m_pointPlane.x>788)
m_pointPlane.x = 0;
else
m_pointPlane.x += 10;
}
// 定义炸弹类
class CBomb,public CObject
{
CPoint m_pointBomb; // 炸弹位置
CBitmap m_bmpBomb; // 炸弹图象
int m_nWidth; // 炸弹图象高
int m_nHeight; // 炸弹图象宽
public:
CBomb();
void ShowBomb(CDC *pDC,CDC *pMemDC,CRect Client);
CRect GetBomb(){return CRect(m_pointBomb.x,m_pointBomb.y,
m_pointBomb.x+m_nWidth,m_pointBomb.y+m_nHeight);}
void ChangePos(int x);
void ResetPos(){m_pointBomb.x=0,m_pointBomb.y=80;}
};
// 炸弹类成员函数
// 炸弹类构造函数
CBomb::CBomb()
{
m_pointBomb.x = 0;
m_pointBomb.y = 80;
m_bmpBomb.LoadBitmap(IDB_BOMB);
BITMAP BM;
m_bmpBomb.GetBitmap(&BM);
m_nWidth = BM.bmWidth;
m_nHeight = BM.bmHeight;
}
// 显示炸弹
void CBomb::ShowBomb(CDC *pDC,CDC *pMemDC,CRect Client)
{
pMemDC->SelectObject(&m_bmpBomb);
pDC->BitBlt(m_pointBomb.x,m_pointBomb.y,
m_nWidth,m_nHeight,pMemDC,0,0,SRCAND);
}
// 改变位置
void CBomb::ChangePos(int x)
{
m_pointBomb.y += 20;
if(m_pointBomb.y>480)
m_pointBomb.y = 80;
m_pointBomb.x = x;
}
// 定义高炮类
class CTank,public CObject
{
CPoint m_pointTank; // 高炮位置
CBitmap m_bmpTank; // 高炮图象
int m_nWidth; // 高炮图象宽
int m_nHeight; // 高炮图象高
public:
CTank();
void ShowTank(CDC *pDC,CDC *pMemDC,CRect Client);
CRect GetTank(){return CRect(m_pointTank.x,m_pointTank.y,
m_pointTank.x+m_nWidth,m_pointTank.y+m_nHeight);}
void ChangePos(int tag);
void ResetPos(){m_pointTank.x = 350;}
};
// 高炮类成员函数
// 高炮类构造函数
CTank::CTank()
{
m_pointTank.x = 350;
m_pointTank.y = 450;
m_bmpTank.LoadBitmap(IDB_TANK);
BITMAP BM;
m_bmpTank.GetBitmap(&BM);
m_nWidth = BM.bmWidth;
m_nHeight = BM.bmHeight;
}
// 显示高炮
void CTank::ShowTank(CDC *pDC,CDC *pMemDC,CRect Client)
{
pMemDC->SelectObject(&m_bmpTank);
pDC->BitBlt(m_pointTank.x,m_pointTank.y,
m_nWidth,m_nHeight,pMemDC,0,0,SRCAND);
}
// 改变位置
void CTank::ChangePos(int tag)
{
if(tag == 0 && m_pointTank.x > 0)
m_pointTank.x -= 20;
else if(tag == 1 && m_pointTank.x+m_nWidth < 798)
m_pointTank.x += 20;
}
// 定义炮弹类
class CStone,public CObject
{
CPoint m_pointStone; // 炮弹位置
CBitmap m_bmpStone; // 炮弹图象
int m_nWidth; // 炮弹图象宽
int m_nHeight; // 炮弹图象高
BOOL m_bShot; // 是否已发射
public:
CStone();
BOOL HaveStone(){return !m_bShot;}
void Shot(int x);
void ShowStone(CDC *pDC,CDC *pMemDC,CRect Client);
CRect GetStone(){return CRect(m_pointStone.x,m_pointStone.y,
m_pointStone.x+m_nWidth,m_pointStone.y+m_nHeight);}
void ChangePos();
void ResetPos(){m_bShot = FALSE;}
void Refill(){m_bShot = FALSE;}
};
// 炮弹类成员函数
// 炮弹类构造函数
CStone::CStone()
{
m_bShot = FALSE;
m_bmpStone.LoadBitmap(IDB_STONE);
BITMAP BM;
m_bmpStone.GetBitmap(&BM);
m_nWidth = BM.bmWidth;
m_nHeight = BM.bmHeight;
}
// 发射
void CStone::Shot(int x)
{
m_bShot = TRUE;
m_pointStone.x = x+48;
m_pointStone.y = 440;
}
// 显示炮弹
void CStone::ShowStone(CDC *pDC,CDC *pMemDC,CRect Client)
{
if(m_bShot)
{
pMemDC->SelectObject(&m_bmpStone);
pDC->BitBlt(m_pointStone.x,m_pointStone.y,
m_nWidth,m_nHeight,pMemDC,0,0,SRCAND);
}
}
// 改变位置
void CStone::ChangePos()
{
if(m_bShot)
m_pointStone.y -= 20;
}
// 自定义消息
#define ON_WM_GAMEOVER 0x0402
#define I_SHOT_YOU 0
#define YOU_SHOT_ME 1
// 定义框架窗口类
class CMyWnd,public CFrameWnd
{
CPlane m_Plane;
CBomb m_Bomb;
CTank m_Tank;
CStone m_Stone;
CPoint m_pointMoutain[5];
public:
CMyWnd();
void DrawFields(CDC *pDC,CRect Client);
BOOL ShotOn(CRect &body1,CRect &body2);
protected:
afx_msg void OnPaint();
afx_msg void OnBegin();
afx_msg void OnEnd();
afx_msg void OnTimer(UINT nIDEvent);
afx_msg void OnKeyDown(UINT nChar,UINT nRepCnt,UINT nFlags);
afx_msg void OnGameOver(UINT tag);
DECLARE_MESSAGE_MAP()
};
// 消息映射
BEGIN_MESSAGE_MAP(CMyWnd,CFrameWnd)
ON_WM_PAINT()
ON_COMMAND(ID_BEGIN,OnBegin)
ON_COMMAND(ID_END,OnEnd)
ON_WM_TIMER()
ON_WM_KEYDOWN()
ON_MESSAGE(ON_WM_GAMEOVER,OnGameOver)
END_MESSAGE_MAP()
// 框架窗口类的成员函数
// 构造函数
CMyWnd::CMyWnd()
{
m_pointMoutain[0] = CPoint(300,400);
m_pointMoutain[1] = CPoint(400,300);
m_pointMoutain[2] = CPoint(500,350);
m_pointMoutain[3] = CPoint(600,250);
m_pointMoutain[4] = CPoint(800,400);
}
// 更新窗口客户区
void CMyWnd::OnPaint()
{
CPaintDC dc(this);
CDC MemDC;
MemDC.CreateCompatibleDC(NULL);
CRect rect;
GetClientRect(&rect);
DrawFields(&dc,rect); // 画战场
m_Plane.ShowPlane(&dc,&MemDC,rect); // 画对方飞机
m_Bomb.ShowBomb(&dc,&MemDC,rect); // 画炸弹
m_Tank.ShowTank(&dc,&MemDC,rect); // 画己方防空导弹车
m_Stone.ShowStone(&dc,&MemDC,rect); // 画导弹
}
// 响应菜单消息,开始游戏
void CMyWnd::OnBegin()
{
m_Bomb.ResetPos();
m_Plane.ResetPos();
m_Tank.ResetPos();
m_Stone.ResetPos();
Invalidate();
SetTimer(1,100,NULL);
}
// 响应菜单消息,游戏结束
void CMyWnd::OnEnd()
{
KillTimer(1);
PostMessage(WM_QUIT);
}
// 定时器消息响应函数
void CMyWnd::OnTimer(UINT nIDEvent)
{
InvalidateRect(m_Plane.GetPlane()); // 修改飞机位置
m_Plane.ChangePos();
InvalidateRect(m_Plane.GetPlane(),FALSE);
InvalidateRect(m_Bomb.GetBomb()); // 修改炸弹位置
m_Bomb.ChangePos(m_Plane.GetPlane().left);
InvalidateRect(m_Bomb.GetBomb(),FALSE);
if(!m_Stone.HaveStone()) // 修改炮弹位置
{
CRect rect = m_Stone.GetStone();
if(rect.top < 3)
m_Stone.Refill();
else
{
InvalidateRect(rect);
m_Stone.ChangePos();
}
InvalidateRect(m_Stone.GetStone(),FALSE);
}
// 判断射击效果
if(!m_Stone.HaveStone() && ShotOn(m_Plane.GetPlane(),m_Stone.GetStone()))
SendMessage(ON_WM_GAMEOVER,YOU_SHOT_ME);
else if(ShotOn(m_Tank.GetTank(),m_Bomb.GetBomb()))
SendMessage(ON_WM_GAMEOVER,I_SHOT_YOU);
}
// 自定义的游戏结束消息响应函数
void CMyWnd::OnGameOver(UINT tag)
{
KillTimer(1);
if(tag == I_SHOT_YOU)
MessageBox("我砸到你了!!!");
else
MessageBox("你击中我了!!!");
}
// 按键消息响应函数
void CMyWnd::OnKeyDown(UINT nChar,UINT nRepCnt,UINT nFlags)
{
if(nChar == VK_LEFT) // 使用 < 键左移高炮
{
InvalidateRect(m_Tank.GetTank());
m_Tank.ChangePos(0);
InvalidateRect(m_Tank.GetTank(),FALSE);
}
else if(nChar == VK_RIGHT) // 使用 > 键右移高炮
{
InvalidateRect(m_Tank.GetTank());
m_Tank.ChangePos(1);
InvalidateRect(m_Tank.GetTank());
}
else if(nChar == 32 && m_Stone.HaveStone()) // 使用空格键发炮
m_Stone.Shot(m_Tank.GetTank().left);
}
// 画战场
void CMyWnd::DrawFields(CDC *pDC,CRect Client)
{
CBrush *pOldBrush,brushSky,brushGrass,brushMoutain;
CRect rect(Client);
brushSky.CreateSolidBrush(RGB(127,200,255)); // 画天空
pOldBrush = pDC->SelectObject(&brushSky);
pDC->Rectangle(rect);
pDC->SelectObject(pOldBrush);
brushGrass.CreateSolidBrush(RGB(0,255,0)); // 画草地
pOldBrush = pDC->SelectObject(&brushGrass);
rect.top = 400;
pDC->Rectangle(rect);
pDC->SelectObject(pOldBrush);
brushMoutain.CreateSolidBrush(RGB(125,50,0)); // 画大山
pOldBrush = pDC->SelectObject(&brushMoutain);
pDC->Polygon(m_pointMoutain,5);
pDC->SelectObject(pOldBrush);
}
// 判断射击效果
BOOL CMyWnd::ShotOn(CRect &body1,CRect &body2)
{
return body1.PtInRect(body2.TopLeft());
}
// 定义应用程序类
class CMyApp,public CWinApp
{
public:
BOOL InitInstance();
};
// 初始化实例函数
BOOL CMyApp::InitInstance()
{
CMyWnd *pFrame = new CMyWnd;
pFrame->LoadFrame(IDR_MAINFRAME);
pFrame->ShowWindow(SW_SHOWMAXIMIZED);
this->m_pMainWnd = pFrame;
return TRUE;
}
// 说明应用程序类的全局对象
CMyApp ThisApp;