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📄 xinvader.cpp

📁 我用MDEngine写的游戏
💻 CPP
📖 第 1 页 / 共 2 页
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12 
			Engine.ClearScreen(SUR_BACK,NULL);
			DrawText(str,250,200);
			if(Timer.IsTimeUp(1000))
			{
				m_State=G_RUN;
				Timer.Reset();
				TimerTP.Reset();
			}
		}
		break;
	case G_GAMEOVER:
		Engine.ClearScreen(SUR_BACK,NULL);
		DrawText("GAME OVER",250,200);
		Input.Update();
		int x=0;
		if(Input.GetKeyDown(KD_DOWN,NULL,x)!=0)
		{
			m_State=G_MENU;
			Timer.Reset();
			TimerTP.Reset();
		}
		break;
	}
}

void ShowMenu()
{
	static int frame=0,select=0;
	Input.Update();
	sur_menu.SetBltRect(0,0,640,480);
	sur_menu.DrawFast(NULL,SUR_BACK,0,0,false);
	sur_menu.SetBltRect(frame<<5,480,(frame+1)<<5,500);
	sur_menu.DrawFast(NULL,SUR_BACK,150,275+select*40,true);
	DrawText("START GAME",190,280);
	DrawText("CREDITS",190,320);
	DrawText("HELP",190,360);
	DrawText("QUIT",190,400);
	if(Timer.IsTimeUp(20))
		if(++frame>19)
			frame=0;

	if(Input.IsKeyPress(DIK_ESCAPE,KD_DOWN))
		RunGame=false;
	else if(Input.IsKeyPress(DIK_UP,KD_DOWN))
	{
		snd_sel.Play();
		if(--select<0)
			select=3;
	}
	else if(Input.IsKeyPress(DIK_DOWN,KD_DOWN))
	{
		snd_sel.Play();
		if(++select>3)
			select=0;
	}
	else if(Input.IsKeyPress(DIK_RETURN,KD_DOWN))
	{
		switch(select)
		{
		case 0:
			m_State=G_RUN;
			ResetGame();
			InitLevel();
			m_State=G_LEVEL;
			break;
		case 1:
			m_State=G_CREDITS;
			break;
		case 2:
			m_State=G_HELP;
			break;
		case 3:
			RunGame=false;
			PostQuitMessage(0);
			break;
		}
		frame=0;
		select=0;
		Timer.Reset();
		TimerTP.Reset();
	}
}

void ShowCredits()
{
	Input.Update();
	Engine.ClearScreen(SUR_BACK,NULL);
	char buffer[25];
	strcpy(buffer,"THIS GAME IS FREEWARE");
	DrawText(buffer,145,60);

	strcpy(buffer,"Programed by Johnhans");
	DrawText(buffer,130,120);

	strcpy(buffer,"@J--S Studio");
	DrawText(buffer,210,180);

	strcpy(buffer,"I WILL BE VERY PLEASED");
	DrawText(buffer,140,240);

	strcpy(buffer,"IF YOU WANT TO MAIL ME");
	DrawText(buffer,130,300);

	strcpy(buffer,"JOHNHANSSZ@HOTMAIL.COM");
	DrawText(buffer,130,360);

	strcpy(buffer,"Thanks to MAURICIORITTER");
	DrawText(buffer,130,420);

	int x=0;
	if(Input.GetKeyDown(KD_DOWN,NULL,x))
	{
		m_State=G_MENU;
		Timer.Reset();
		TimerTP.Reset();
	}
}

void ShowHelp()
{
	static int frame = 0;
	static bool show = true;
	Input.Update();

	Engine.ClearScreen(SUR_BACK,NULL);

	DrawText("PHOTON AMMO",90,45);
	DrawText("WEAPON ADVANCE",90,95);
	DrawText("100 POINTS BONUS",90,145);
	DrawText("LASER AMMO",90,195);
	DrawText("SHIELD CHARGE",90,245);
	DrawText("LEFT, RIGHT - MOVE SHIP",50,290);
	DrawText("DOWN OR ENTER - STOP SHIP",50,325);
	DrawText("CTRL - CHANGE WEAPON",50,360);
	if(show)
		DrawText("PRESS ANY KEY TO CONTINUE",140,450);
	sur_Extras.SetBltRect(frame*25,0,(frame+1)*25,25);
	sur_Extras.DrawFast(NULL,SUR_BACK,50,40,false);
	sur_Extras.SetBltRect(frame*25,25,(frame+1)*25,50);
	sur_Extras.DrawFast(NULL,SUR_BACK,50,90,false);
	sur_Extras.SetBltRect(frame*25,50,(frame+1)*25,75);
	sur_Extras.DrawFast(NULL,SUR_BACK,50,140,false);
	sur_Extras.SetBltRect(frame*25,75,(frame+1)*25,100);
	sur_Extras.DrawFast(NULL,SUR_BACK,50,190,false);
	sur_Extras.SetBltRect(frame*25,100,(frame+1)*25,125);
	sur_Extras.DrawFast(NULL,SUR_BACK,50,240,false);
	
	if(Timer.IsTimeUp(20))
		if(++frame>18)
			frame=0;
	if(TimerTP.IsTimeUp(1000))
		show=!show;

	int x=0;
	if(Input.GetKeyDown(KD_DOWN,NULL,x)!=0)
	{
		m_State=G_MENU;
		Timer.Reset();
		TimerTP.Reset();
	}
}

void DrawBkgnd()
{
	static int y=455;
	sur_bkgnd.SetBltRect(0,y,640,455);
	sur_bkgnd.DrawFast(NULL,SUR_BACK,0,0,false);
	sur_bkgnd.SetBltRect(0,0,640,y);
	sur_bkgnd.DrawFast(NULL,SUR_BACK,0,455-y,false);
	if(--y<0)
		y=455;
}

void DrawStatus()
{
	sur_bkgnd.SetBltRect(0,455,640,480);
	sur_bkgnd.DrawFast(NULL,SUR_BACK,0,455,false);	// 画框架

	sur_bkgnd.SetBltRect(iWeapon*87,480,(iWeapon+1)*87,500);
	sur_bkgnd.DrawFast(NULL,SUR_BACK,84,458,false);	// 画武器

	char				buf[8];
    unsigned int        rem;
	int					iAmmo;
	if (iWeapon < 3)
		iAmmo = iLaserAmmo;
	else
		iAmmo = iPhotonAmmo;
    buf[0] = iAmmo/100 + '0';
    rem = iAmmo % 100;
    buf[1] = rem/10 + '0';
    rem = iAmmo % 10;
    buf[2] = rem + '0';
	buf[3] = '\0';
	DrawText(buf, 241, 460);	// 画弹药数

    buf[0] = rem/1000000 + '0';
    rem = iScore % 1000000;
    buf[1] = rem/100000 + '0';
    rem = iScore % 100000;
    buf[2] = rem/10000 + '0';
    rem = iScore % 10000;
    buf[3] = rem/1000 + '0';
    rem = iScore % 1000;
    buf[4] = rem/100 + '0';
    rem = iScore % 100;
    buf[5] = rem/10 + '0';
    rem = iScore % 10;
    buf[6] = rem + '0';
	buf[7] = '\0';
	DrawText(buf,533,460);	// 画得分

	BYTE cr,cg;
	static bool show=true;
	if(iShield>60 && iShield<=100)
	{	cr=0;cg=255;show=true;	}
	else if(iShield>40 && iShield<=60)
	{	cr=255;cg=255;show=true;	}
	else if(iShield>0 && iShield<=40)
	{
		cr=255;cg=0;
		if(TimerTP.IsTimeUp(50))
			show=!show;
	}
	RECT rc={361,458,361+iShield,478};
	if(show)
		Engine.ClearScreen(SUR_BACK,&rc,cr,cg,0);	// 画防护层
}

void DrawShip()
{
	static int step=1;

	int x=iShipframe%5;
	int y=iShipframe/5;

	if(iShield>0)
	{
		iShipPos+=iShipMov;
		if (iShipPos <= 1) { iShipMov = 0; iShipPos = 1; }
		else if (iShipPos >= 569) { iShipMov = 0; iShipPos = 569; }

		sur_Ship.SetBltRect(x*70,y*70,(x+1)*70,(y+1)*70);
		sur_Ship.DrawFast(NULL,SUR_BACK,iShipPos,380,true);
		iShipframe+=step;
		if(iShipframe>=24 || iShipframe<=0)
			step=-step;
	}
	else if(iShipframe<21)
	{
		sur_Ship.SetBltRect(x*70,(y+5)*70,(x+1)*70,(y+6)*70);
		sur_Ship.DrawFast(NULL,SUR_BACK,iShipPos,380,true);
		iShipframe++;
	}
}

bool DrawUFO()
{
	bool bNone=true;
	for(int i=0;i<MAX_UFO;i++)
	{
		if((m_UFO[i].type>>2) == _UFO_)
		{
			bNone=false;
			int x=m_UFO[i].frame%5;
			int y=m_UFO[i].frame/5;
			sur_UfoN->SetBltRect(x*70,y*70,(x+1)*70,(y+1)*70);
			sur_UfoN->DrawFast(NULL,SUR_BACK,m_UFO[i].x,m_UFO[i].y,true);
			if(++m_UFO[i].frame>49)
				m_UFO[i].frame=0;

			if(rand()%ShootChance==0)
			{
				UFOShoot(m_UFO[i].x,m_UFO[i].y);
				snd_ufire.Play();
			}
			if(m_UFO[i].type==_UFO_3_ && rand()%15==0 && (m_UFO[i].x>iShipPos-70 && m_UFO[i].x<iShipPos+140))
			{
				UFOShoot(m_UFO[i].x,m_UFO[i].y);
				snd_ufire.Play();
			}
			
			switch(m_UFO[i].move)
			{
			case 0:
				{
					for(int j=i+1;j<MAX_UFO;j++)		// 敌方UFO之间的碰撞检测
						UFO_Hit_UFO(i,j);
						m_UFO[i].x+=m_UFO[i].inc;
					if(m_UFO[i].x>=570 || m_UFO[i].x<=0)
						m_UFO[i].inc=-m_UFO[i].inc;
				}
				break;

				case 1:
				m_UFO[i].x+=m_UFO[i].inc;
				if(m_UFO[i].x>=567 || m_UFO[i].x<=3)
				{
					m_UFO[i].move=2;
					m_UFO[i].qdown=0;
					m_UFO[i].inc=-m_UFO[i].inc;
				}
				break;

			case 2:
				m_UFO[i].y+=abs(m_UFO[i].inc);
				m_UFO[i].qdown+=abs(m_UFO[i].inc);
				if(m_UFO[i].qdown>=80)
					m_UFO[i].move=1;
				break;

				case 3:
				m_UFO[i].x-=m_UFO[i].inc;
				m_UFO[i].y-=m_UFO[i].inc;
				if(m_UFO[i].x<=0)
				{
					m_UFO[i].x=0;
					m_UFO[i].move=4;
				}
				if(m_UFO[i].y<=0)
				{
					m_UFO[i].y=0;
					m_UFO[i].move=5;
				}
				break;

				case 4:
				m_UFO[i].x+=m_UFO[i].inc;
				m_UFO[i].y-=m_UFO[i].inc;
				if(m_UFO[i].x>=560)
				{
					m_UFO[i].x=560;
					m_UFO[i].move=3;
				}
				if(m_UFO[i].y<=0)
				{
					m_UFO[i].y=0;
					m_UFO[i].move=6;
				}
				break;

			case 5:
				m_UFO[i].x-=m_UFO[i].inc;
				m_UFO[i].y+=m_UFO[i].inc;
				if(m_UFO[i].x<=0)
				{
					m_UFO[i].x=0;
					m_UFO[i].move=6;
				}
				if(m_UFO[i].y>=400)
				{
					m_UFO[i].y=400;
					m_UFO[i].move=3;
				}
				break;

			case 6:
				m_UFO[i].x+=m_UFO[i].inc;
				m_UFO[i].y+=m_UFO[i].inc;
				if(m_UFO[i].x>=560)
				{
					m_UFO[i].x=560;
					m_UFO[i].move=5;
				}
				if(m_UFO[i].y>=400)
				{
					m_UFO[i].y=400;
					m_UFO[i].move=4;
				}
				break;

			case 7:
				m_UFO[i].x+=m_UFO[i].inc;
				if(m_UFO[i].x<=-70)
					m_UFO[i].x=640;
				else if(m_UFO[i].x>=640)
					m_UFO[i].x=-70;
				break;
			}

			if(m_UFO[i].move!=0 && m_UFO[i].move!=7)
				UFO_Hit_Ship();
		}
		else if(m_UFO[i].type == _UFO_EXPLODE_)
		{
			bNone=false;
			int x=m_UFO[i].frame%5;
			int y=m_UFO[i].frame/5;
			sur_UfoN->SetBltRect(x*70,(y+10)*70,(x+1)*70,(y+11)*70);
			sur_UfoN->DrawFast(NULL,SUR_BACK,m_UFO[i].x,m_UFO[i].y,true);
			if(++m_UFO[i].frame>19)
			{
				m_UFO[i].frame=0;
				m_UFO[i].type=_UFO_DIED_;
			}
		}
	}
	return bNone;
}


void DrawBullet()
{
	for(int i=0;i<MAX_BULLET;i++)
	{
		if(m_Bullet[i].type!=0)
		{
			if(m_Bullet[i].y<0 || m_Bullet[i].y>454)
				m_Bullet[i].type=0;
			else
			{
				switch(m_Bullet[i].type)
				{
				case _UFO_:
					sur_Bullet.SetBltRect(m_Bullet[i].frame*20,0,(m_Bullet[i].frame+1)*20,20);
					if(++m_Bullet[i].frame>19)
						m_Bullet[i].frame=0;
					m_Bullet[i].y+=6+iLevel/6;
					break;
				case _SHIP_S1_:
					sur_Bullet.SetBltRect(220,20,240,40);
					m_Bullet[i].y-=6;
					break;
				case _SHIP_S2_:
					sur_Bullet.SetBltRect(m_Bullet[i].frame*20,20,(m_Bullet[i].frame+1)*20,40);
					if(++m_Bullet[i].frame>10)
						m_Bullet[i].frame=0;
					m_Bullet[i].y-=10;
					break;
				}
				sur_Bullet.DrawFast(NULL,SUR_BACK,m_Bullet[i].x,m_Bullet[i].y,true);
			}
		}
	}
}

bool DrawExtra()
{
	bool bNone=true;
	for(int i=0;i<MAX_EXTRA;i++)
	{
		if(m_Extra[i].type!=0)
		{
			bNone=false;
			sur_Extras.SetBltRect(25*m_Extra[i].frame,(m_Extra[i].type-11)*25,25*(m_Extra[i].frame+1),(m_Extra[i].type-11+1)*25);
			sur_Extras.DrawFast(NULL,SUR_BACK,m_Extra[i].x,m_Extra[i].y,true);
			if(++m_Extra[i].frame>18)
				m_Extra[i].frame=0;
			if((m_Extra[i].y+=m_Extra[i].inc)>455)
				m_Extra[i].type=0;
		}
	}
	return bNone;
}

void ProcessInput()
{
	Input.Update();

	if(Input.IsKeyPress(DIK_ESCAPE,KD_DOWN))
	{
		m_State=G_MENU;
		Timer.Reset();
		TimerTP.Reset();
	}

	if(iShield>0)
	{
		if(Input.IsKeyPress(DIK_LEFT,KD_DOWN))
			iShipMov=-4;
		else if(Input.IsKeyPress(DIK_RIGHT,KD_DOWN))
			iShipMov=4;
		else if(!iShipMov==0 && (Input.IsKeyPress(DIK_RETURN,KD_DOWN) || Input.IsKeyPress(DIK_DOWN,KD_DOWN)))
		{
			long pos=(long)((iShipPos-320)/320.0*(PAN_RIGHT/20));
			snd_stop.SetPan(pos);
			iShipMov=0;
			snd_stop.Play();
		}
		else if(Input.IsKeyPress(DIK_LCONTROL,KD_DOWN) || Input.IsKeyPress(DIK_RCONTROL,KD_DOWN))
		{
			if(++iWeapon>iMaxWeapon)
				iWeapon=0;
		}
		else if(Input.IsKeyPress(DIK_SPACE,KD_DOWN) && m_Bullet[0].type==0 && m_Bullet[1].type==0 && m_Bullet[2].type==0)
		{
			snd_sfire.Play();
			switch(iWeapon)
			{
			case WP_LASER_1:
				if(--iLaserAmmo<0)
				{
					iLaserAmmo=0;
					iShield-=4;
				}
				m_Bullet[0].type=_SHIP_S1_;
				m_Bullet[0].x=iShipPos+24;
				m_Bullet[0].y=380;
				break;
			case WP_LASER_2:
				if((iLaserAmmo-=2)<0)
				{
					iLaserAmmo=0;
					iShield-=8;
				}
				m_Bullet[0].type=_SHIP_S1_;
				m_Bullet[0].x=iShipPos+11;
				m_Bullet[0].y=380;
				m_Bullet[1].type=_SHIP_S1_;
				m_Bullet[1].x=iShipPos+34;
				m_Bullet[1].y=380;
				break;
			case WP_LASER_3:
				if((iLaserAmmo-=3)<0)
				{
					iLaserAmmo=0;
					iShield-=12;
				}
				m_Bullet[0].type=_SHIP_S1_;
				m_Bullet[0].x=iShipPos+11;
				m_Bullet[0].y=380;
				m_Bullet[1].type=_SHIP_S1_;
				m_Bullet[1].x=iShipPos+23;
				m_Bullet[1].y=380;
				m_Bullet[2].type=_SHIP_S1_;
				m_Bullet[2].x=iShipPos+35;
				m_Bullet[2].y=380;
				break;
			case WP_PHOTON_1:
				if((--iPhotonAmmo)<0)
				{
					iPhotonAmmo=0;
					iShield-=6;
				}
				m_Bullet[0].type=_SHIP_S2_;
				m_Bullet[0].x=iShipPos+24;
				m_Bullet[0].y=380;
				break;
			case WP_PHOTON_2:
				if((iPhotonAmmo-=2)<0)
				{
					iPhotonAmmo=0;
					iShield-=12;
				}
				m_Bullet[0].type=_SHIP_S2_;
				m_Bullet[0].x=iShipPos+11;
				m_Bullet[0].y=380;
				m_Bullet[1].type=_SHIP_S2_;
				m_Bullet[1].x=iShipPos+34;
				m_Bullet[1].y=380;
				break;
			case WP_PHOTON_3:
				if((iPhotonAmmo-=3)<0)
				{
					iPhotonAmmo=0;
					iShield-=18;
				}
				m_Bullet[0].type=_SHIP_S2_;
				m_Bullet[0].x=iShipPos+11;
				m_Bullet[0].y=380;
				m_Bullet[1].type=_SHIP_S2_;
				m_Bullet[1].x=iShipPos+23;
				m_Bullet[1].y=380;
				m_Bullet[2].type=_SHIP_S2_;
				m_Bullet[2].x=iShipPos+35;
				m_Bullet[2].y=380;
				break;
			}
			TestShipExplode();
		}
	}
}

void HitTest()
{
	UFOS_Hit_Ship();			// 敌方子弹与玩家飞船碰撞检测
	ShipS_Hit_UFO();			// 玩家子弹与敌方UFO碰撞检测
	Ship_Hit_Extra();			// 玩家飞船与物品碰撞检测
}
12

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