canvasframe.cpp

《Visual C++游戏设计入门》的配套代码

	result = DSBuf[num]->Lock(0,wsize,&pAudio,&bytesAudio,NULL,NULL,NULL);
	if(result != DS_OK)
	{
		MessageBox("锁定缓冲区失败!");
		return;
	}
	mmresult = mmioRead(hmmio,(HPSTR)pAudio,bytesAudio);
	if(mmresult == -1)
	{
		MessageBox("读取音文件数据失败!");
		return;
	}
	result = DSBuf[num]->Unlock(pAudio,bytesAudio,NULL,NULL);
	if(result != DS_OK)
	{
		MessageBox("解除锁定缓冲区失败!");
		return;
	}
	mmioClose(hmmio,0);
}

void canvasFrame::InitDD()
{
//建立 DirectDraw 对象
	result = DirectDrawCreateEx(NULL, (VOID**)&DD, IID_IDirectDraw7, NULL);
    if (result != DD_OK)
	{
		MessageBox("建立DirectDraw对象失败!");
		return;
	}
//设定协调层级
	result = DD->SetCooperativeLevel(m_hWnd,DDSCL_EXCLUSIVE |
			         DDSCL_FULLSCREEN|DDSCL_ALLOWREBOOT );
	if(result !=DD_OK)
	{
		MessageBox("设定程序协调层级失败!");
		return;
	}
//设定显示模式
	result = DD->SetDisplayMode(640,480,16,0,DDSDM_STANDARDVGAMODE); 
	if(result !=DD_OK)
	{
		MessageBox("设定屏幕显示模式失败!");
		return;
	}
//建立主绘图页
	memset(&DDde,0,sizeof(DDde));       
	DDde.dwSize = sizeof(DDde);           
	DDde.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
	DDde.dwBackBufferCount = 1;        
	DDde.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_COMPLEX | DDSCAPS_FLIP;
	result = DD->CreateSurface(&DDde,&DDSur,NULL);
	if(result !=DD_OK)
	{
	 	MessageBox("建立主绘图页失败!");
		return;
	}
//连结后缓冲区
	DDcaps.dwCaps = DDSCAPS_BACKBUFFER;  
	result = DDSur->GetAttachedSurface(&DDcaps,&DDBuf); 
	if(result !=DD_OK)
	{
		MessageBox("连接后缓冲区失败!");
		return;
	}
//声明幕后幕存区的共同特性
	memset(&DDde,0,sizeof(DDde));        
	DDde.dwSize = sizeof(DDde);
	DDde.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH; 
	DDde.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN ;
}

void canvasFrame::InitDS()
{
//建立 DirectSound 对象
    result = DirectSoundCreate( NULL, &DS, NULL ); 
	if(result != DS_OK)
	{
		MessageBox("建立 DirectSound 对象失败!");
		return;
	}
//设定协调层级
    result = DS->SetCooperativeLevel( m_hWnd, DSSCL_PRIORITY );
	if(result != DS_OK)
	{
		MessageBox("设定协调层级失败!");
		return;
	}
//建立主缓冲区
    memset( &DSde,0, sizeof(DSde) );          
    DSde.dwSize        = sizeof(DSde);       
    DSde.dwFlags       = DSBCAPS_PRIMARYBUFFER;
    DSde.dwBufferBytes = 0;
    DSde.lpwfxFormat   = NULL;
    result = DS->CreateSoundBuffer( &DSde, &DSPri, NULL );
	if(result != DS_OK)
	{
		MessageBox("建立主缓冲区失败!");
		return;
	}
//设定声音播放格式
    memset( &DSfmt,0, sizeof(DSfmt));
    DSfmt.wFormatTag      = WAVE_FORMAT_PCM;
    DSfmt.nChannels       = 2;               
    DSfmt.nSamplesPerSec  = 44100;           
    DSfmt.wBitsPerSample  = 16;          
    DSfmt.nBlockAlign     = DSfmt.wBitsPerSample / 8 * DSfmt.nChannels;
    DSfmt.nAvgBytesPerSec = DSfmt.nSamplesPerSec * DSfmt.nBlockAlign;
    result = DSPri->SetFormat(&DSfmt);     
	if(result != DS_OK)
	{
		MessageBox("设定播放格式失败!");
		return;
	}
}

void canvasFrame::InitDI()
{
//建立 DirectInput 对象
	HINSTANCE hinst = AfxGetInstanceHandle(); 
	result = DirectInputCreateEx(hinst, DIRECTINPUT_VERSION,IID_IDirectInput7, (void**)&DI, NULL); 
	if(result != DI_OK)
	{
		MessageBox("建立 DirectInput 对象失败!");
		return;
	}
//建立输入装置对象
	result = DI->CreateDeviceEx(GUID_SysMouse, IID_IDirectInputDevice7,(void**)&DIms, NULL); 
	if(result != DI_OK)
	{
		MessageBox("建立鼠标输入装置失败!");
		return;
	}
//设定数据格式
	result = DIms->SetDataFormat(&c_dfDIMouse2);
	if(result != DI_OK)
	{
		MessageBox("设定数据格式失败!");
		return;
	}
//设定协调层级
	result = DIms->SetCooperativeLevel(m_hWnd,DISCL_BACKGROUND | DISCL_NONEXCLUSIVE); 
	if(result != DI_OK)
	{
		MessageBox("设定程序协调层级失败!");
		return;
	}
//取用输入装置
	result = DIms->Acquire();
	if(result != DI_OK)
	{
		MessageBox("取用输入装置失败!");
		return;
	}
}

void canvasFrame::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	if( nChar== VK_ESCAPE )      //按下 Esc 键
		PostMessage(WM_CLOSE );  //结束程序
	if( nChar == VK_F1)          //按下 F1 键
	{
		over = false;
		score = 0;
		ship.x = 540;
		ship.y = 200;
		ship.r[0].left = ship.x + 16;
		ship.r[0].top = ship.y + 3;
		ship.r[0].right = ship.x + 50;
		ship.r[0].bottom = ship.y + 53;
		ship.r[1].left = ship.x + 8;
		ship.r[1].top = ship.y + 16;
		ship.r[1].right = ship.x + 78;
		ship.r[1].bottom = ship.y + 50;
		ship.r[2].left = ship.x + 35;
		ship.r[2].top = ship.y + 35;
		ship.r[2].right = ship.x + 81;
		ship.r[2].bottom = ship.y + 71;
		DSBuf[0]->Play(0,0,1);        //回放背景音乐
	}
	CFrameWnd::OnKeyDown(nChar, nRepCnt, nFlags);
}
void canvasFrame::MonBombShip()
{
	if(mcount != 0)
	for(i=0;i<50;i++)          //取出所有怪物
		if(mon[i].exist)
			for(j=0;j<=3;j++)  //取出所有怪物的碰撞点
				for(m=0;m<3;m++)   //取出飞机各个区块
					if(mon[i].p[j].x >= ship.r[m].left && mon[i].p[j].x <= ship.r[m].right && mon[i].p[j].y >= ship.r[m].top && mon[i].p[j].y <= ship.r[m].bottom)
					{
						DDBuf->BltFast(mon[i].p[j].x-40,mon[i].p[j].y-40,DDPla[7],CRect(0,0,80,80),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
						DDBuf->BltFast(0,150,DDPla[8],CRect(0,0,640,159),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
						DSBuf[0]->Stop();          //停止背景音乐
						DSBuf[3]->Play(0,0,0);     //播放碰撞声音
						for(i=0;i<50;i++)          //清空怪物数组
							if(mon[i].exist)
								mon[i].exist = false;
						for(i=0;i<100;i++)         //清空怪物子弹数组
							if(c[i].exist)
								c[i].exist = false;
						for(i=0;i<100;i++)         //清空飞机子弹数组
							if(b[i].exist)
								b[i].exist = false;
						bcount = 0;
						ccount = 0;
						mcount = 0;
						over = true;               //游戏结束
						break;
					}
}
void canvasFrame::HitShip()
{
	if(ccount !=0)            
		for(i=0;i<100;i++)   //取出所有怪物子弹
			if(c[i].exist)
			{
				c[i].hitx = c[i].x + 10;
				c[i].hity = c[i].y + 5;
				hit = false;
				for(j=0;j<=2;j++) //取出飞机各个区块
				{
					if(c[i].hitx >= ship.r[j].left && c[i].hitx <= ship.r[j].right && c[i].hity >= ship.r[j].top && c[i].hity <= ship.r[j].bottom)
					{
						hit = true;
						DDBuf->BltFast(ship.x,ship.y,DDPla[7],CRect(0,0,80,80),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
						break;
					}
				}
				if(hit)
				{
					DDBuf->BltFast(0,150,DDPla[8],CRect(0,0,640,159),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
					DSBuf[0]->Stop();        //停止背景音乐
					DSBuf[3]->Play(0,0,0);   //播放碰撞声音
					for(i=0;i<50;i++)        //清空怪物数组
						if(mon[i].exist)
							mon[i].exist = false;
					for(i=0;i<100;i++)       //清空怪物子弹数组
						if(c[i].exist)
							c[i].exist = false;
					for(i=0;i<100;i++)       //清空飞机子弹数组
						if(b[i].exist)
							b[i].exist = false;
					over = true;             //游戏结束
					bcount = 0;
					ccount = 0;
					mcount = 0;
					break;
				}
				else
				{
					c[i].x +=5;       //计算下次 X 坐标
					if(c[i].x>=640)   //子弹移动超出屏幕
					{
						c[i].exist = false;
						ccount--;
					}
				}
			}
}
void canvasFrame::HitMon()
{
	if(bcount != 0)   
		for(i=0;i<100;i++)     //取出所有飞机子弹
		{
			if(b[i].exist)
			{
				b[i].hitx = b[i].x + 3;
				b[i].hity = b[i].y + 5;
				hit = false;
				for(m=0;m<50;m++)            //取出所有怪物
				{
					if(mon[m].exist)
					{
						for(j=0;j<=2;j++)    //取出怪物各个区块
						{
							if(b[i].hitx >= mon[m].r[j].left && b[i].hitx <= mon[m].r[j].right && b[i].hity >= mon[m].r[j].top && b[i].hity <= mon[m].r[j].bottom)
							{
								hit = true;
								DDBuf->BltFast(mon[m].x,mon[m].y,DDPla[7],CRect(0,0,80,80),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
								switch(mon[m].type)
								{
								case 0:            //打中蜗牛
									score+=100;
									break;
								case 1:            //打中小鸟
									score+=50;
									break;
								case 2:            //打中鱼
									score+=150;
								}
								break;
							}
						}
						if(hit)
						{
							mon[m].exist = false;
							b[i].exist = false;
							DSBuf[2]->Play(0,0,0);
							mcount--;
							bcount--;
							break;
						}
					}
				}
				if(hit)
					continue;
				b[i].x -=20;	//计算下次 X 坐标
				if(b[i].x<-10)	//子弹移动超出屏幕
				{
					b[i].exist = false;
					bcount--;
				}
			}
		}
}

void canvasFrame::PasteMon()
{
	if(mcount != 0)
	for(i=0;i<50;i++)      //怪物坐标与贴图
		if(mon[i].exist)
		{
			switch(mon[i].type)
			{
			case 0:
				if(mon[i].draw%10 == 0)
				{
					mon[i].draw = 0;
					mon[i].x += 20;
					if(mon[i].x >= 640)
					{
						mon[i].exist = false;
						break;
					}
					if(rand()%2 == 0)    //以随机数决定往上或往下移动
					{
						mon[i].y -= 20;
						if(mon[i].y<0)   //移动到最上方
							mon[i].y =0;
					}
					else
					{
						mon[i].y +=20;
						if(mon[i].y>420) //移动到最下方
							mon[i].y = 420;
					}
					if(mon[i].x <100)    //判断是否发射子弹
						for(j=0;j<100;j++)
						{
							if(!c[j].exist)
							{
								c[j].x = mon[i].x + 61;
								c[j].y = mon[i].y+30;
								c[j].exist = true;
								ccount++;
								break;
							}
						}
				}
				mon[i].r[0].left = mon[i].x + 28;
				mon[i].r[0].top = mon[i].y + 7;
				mon[i].r[0].right = mon[i].x + 72;
				mon[i].r[0].bottom = mon[i].y + 34;
				mon[i].r[1].left = mon[i].x;
				mon[i].r[1].top = mon[i].y + 23;
				mon[i].r[1].right = mon[i].x + 49;
				mon[i].r[1].bottom = mon[i].y + 59;
				mon[i].r[2].left = mon[i].x + 24;
				mon[i].r[2].top = mon[i].y + 50;
				mon[i].r[2].right = mon[i].x + 48;
				mon[i].r[2].bottom = mon[i].y + 59;
				mon[i].p[0].x = mon[i].x +46;
				mon[i].p[0].y = mon[i].y + 8;
				mon[i].p[1].x = mon[i].x + 71;
				mon[i].p[1].y = mon[i].y + 22;
				mon[i].p[2].x = mon[i].x + 36;
				mon[i].p[2].y = mon[i].y + 57;
				mon[i].p[3].x = mon[i].x + 1;
				mon[i].p[3].y = mon[i].y + 31;
				mon[i].draw++;
				DDBuf->BltFast(mon[i].x,mon[i].y,DDPla[3],CRect(0,0,80,59),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
				break;
			case 1:
				if(mon[i].draw%5 == 0)
				{
					mon[i].draw = 0;
					if(mon[i].x > ship.x)
						mon[i].x-=30;
					else
						mon[i].x+=30;
					if(mon[i].y > ship.y)
						mon[i].y-=30;
					else 
						mon[i].y+=30;

				}
				mon[i].r[0].left = mon[i].x + 14;
				mon[i].r[0].top = mon[i].y + 4;
				mon[i].r[0].right = mon[i].x + 57;
				mon[i].r[0].bottom = mon[i].y + 26;
				mon[i].r[1].left = mon[i].x+1;
				mon[i].r[1].top = mon[i].y + 14;
				mon[i].r[1].right = mon[i].x + 43;
				mon[i].r[1].bottom = mon[i].y + 41;
				mon[i].r[2].left = mon[i].x + 5;
				mon[i].r[2].top = mon[i].y + 34;
				mon[i].r[2].right = mon[i].x + 22;
				mon[i].r[2].bottom = mon[i].y + 55;
				mon[i].p[0].x = mon[i].x +52;
				mon[i].p[0].y = mon[i].y + 18;
				mon[i].p[1].x = mon[i].x + 20;
				mon[i].p[1].y = mon[i].y + 4;
				mon[i].p[2].x = mon[i].x + 3;
				mon[i].p[2].y = mon[i].y + 22;
				mon[i].p[3].x = mon[i].x + 14;
				mon[i].p[3].y = mon[i].y + 50;
				mon[i].draw++;
				DDBuf->BltFast(mon[i].x,mon[i].y,DDPla[4],CRect(0,0,60,56),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
				break;
			case 2:
				if(mon[i].draw%10 == 0)
				{
					mon[i].draw = 0;
					mon[i].x -= 20;
					if(mon[i].x < 0)
					{
						mon[i].exist = false;
						break;
					}
				}
				mon[i].r[0].left = mon[i].x + 1;
				mon[i].r[0].top = mon[i].y + 8;
				mon[i].r[0].right = mon[i].x + 78;
				mon[i].r[0].bottom = mon[i].y + 37;
				mon[i].r[1].left = mon[i].x+8;
				mon[i].r[1].top = mon[i].y + 36;
				mon[i].r[1].right = mon[i].x + 52;
				mon[i].r[1].bottom = mon[i].y + 50;
				mon[i].r[2].left = mon[i].x + 20;
				mon[i].r[2].top = mon[i].y + 0;
				mon[i].r[2].right = mon[i].x + 37;
				mon[i].r[2].bottom = mon[i].y + 8;
				mon[i].p[0].x = mon[i].x +4;
				mon[i].p[0].y = mon[i].y + 21;
				mon[i].p[1].x = mon[i].x + 31;
				mon[i].p[1].y = mon[i].y + 3;
				mon[i].p[2].x = mon[i].x + 72;
				mon[i].p[2].y = mon[i].y + 24;
				mon[i].p[3].x = mon[i].x + 36;
				mon[i].p[3].y = mon[i].y + 45;
				mon[i].draw++;
				DDBuf->BltFast(mon[i].x,mon[i].y,DDPla[5],CRect(0,0,79,51),DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY);
				break;
			}
		}
}