class.cpp

一个小飞机游戏

		}
	}
}

// 电脑飞机爆炸
void ComputerPlane::blast()
{
	if(life<=0 && explosible && blastNum<8){
		glPushMatrix();
		glTranslatef(x, y, 0.0f);
		glEnable(GL_TEXTURE_2D);
		glBindTexture(GL_TEXTURE_2D,othertex[2].texID);
		glBegin(GL_QUADS);
			glTexCoord2f(blastNum*0.125f, 0.0f);		glVertex2f(-50.0f,-50.0f);
			glTexCoord2f(blastNum*0.125f+0.125f,0.0f);	glVertex2f( 50.0f,-50.0f);
			glTexCoord2f(blastNum*0.125f+0.125f,1.0f);	glVertex2f( 50.0f, 50.0f);
			glTexCoord2f(blastNum*0.125f, 1.0f);		glVertex2f(-50.0f, 50.0f);
		glEnd();
		glDisable(GL_TEXTURE_2D);
		glPopMatrix();

		// 爆炸参数更新
		blastTime+=timer;
		if(blastTime>30){
			if(blastNum==0)
				FSOUND_PlaySound(FSOUND_FREE,sound_2);
			blastNum++;
			blastTime=0;
		}

		if(blastNum==8){	//爆炸完毕
			// 按照爆炸了的电脑飞机种类加分
			myPlane.setScore(myPlane.getScore()+rewardScore);
			
			// 类型2的高级飞机打完后会自爆
			if(kind==2){
				for(int i=0;i<20;i++){
					Ammunition t1(x,y-25,18*i,3,100.0f,0);
					t1.setOwner(3);
					ammunitions[ammunitionIndex++]=t1;
					if(ammunitionIndex==MAX_AMMUNITION)
						ammunitionIndex=0;
				}
			}
			// 飞机爆炸后留下物品
			leftaward();
		}
	}
}

// 电脑飞机爆炸后留下物品
void ComputerPlane::leftaward()
{
	int temp=rand()%10;

	if(temp==0){			// 高级子弹补给
		Award t1(x,y,1,100,0);
		awards[awardIndex++]=t1;
		if(awardIndex==MAX_AWARD)
			awardIndex=0;
	}else if(temp==1){		// 生命补给
		Award t1(x,y,1,100,1);
		awards[awardIndex++]=t1;
		if(awardIndex==MAX_AWARD)
			awardIndex=0;
	}else if(temp==2){		// 炸弹补给
		Award t1(x,y,1,100,2);
		awards[awardIndex++]=t1;
		if(awardIndex==MAX_AWARD)
			awardIndex=0;
	}
}

void ComputerPlane::damaged(int damage)
{
	life-=damage;
	if(life<=0)
		explosible=true;
}


// Ammunition类的成员定义
// 其种类有四种，分别由kind决定，有0，1，2，3四种。其中：
//	0为普通子弹，1为我方高级子弹，2为敌方高级子弹，3为我方的炸弹

// 子弹初始化
Ammunition::Ammunition(float a,float b,float d,float s,int l,int k):BaseObject(a,b,l,s,d,k)
{
	explosible=false;
	displacement=0;
	owner=0;
	if(kind==0)				//设置子弹的威力
		explodeLevel=20;	
	else if(kind==1)
		explodeLevel=50;
	else if(kind==2)
		explodeLevel=50;
	else if(kind==3)
		explodeLevel=100;
}

// 判断子弹是否打中飞机
void Ammunition::hitTheTarget()
{
	if(owner==1){		// 玩家发出的子弹
		for(int i=0; i<MAX_COMPUTER; i++){
			if(distance(computers[i].getX(),computers[i].getY(),x,y)<=25 && computers[i].getLife()>0){			//子弹在敌机范围内
				life=0;
				explosible=true;
				computers[i].damaged(explodeLevel);
				return;
			}
		}	
	}else if(owner==3){		// 电脑发出的子弹
		if(distance(myPlane.getX(),myPlane.getY(),x,y)<=20 && myPlane.getLife()>0){			//子弹在敌机范围内
			life=0;
			explosible=true;			
			myPlane.setLife(myPlane.getLife()-explodeLevel);
			
		}
	}
}

// 子弹移动
void Ammunition::move()
{
	if(life>0){			// 子弹有效
		if(kind!=3){		// 不是炸弹
			if(displacement<AMMUNITION_RANGE){	// 在射程内
				x=x+speed*cos(direction/180*PI)*timer/20;	
				y=y+speed*sin(direction/180*PI)*timer/20;
				displacement+=speed*timer/20;
				hitTheTarget();				// 检查是否射中
			}else{
				life=0;
				explosible=false;
			}
		}else{							// 炸弹
			if(displacement<BOMB_RANGE){
				x=x+speed*cos(direction/180*PI)*timer/20;	
				y=y+speed*sin(direction/180*PI)*timer/20;
				displacement+=speed*timer/20;
			}else{
				life=0;
				explosible=true;
			}
		}
	}
}

// 子弹爆炸
void Ammunition::blast()
{
	if(life<=0 && explosible && blastNum<8){		// 子弹无效且允许爆炸且未爆炸完
		glPushMatrix();
		glTranslatef(x, y, 0.0f);
		glEnable(GL_TEXTURE_2D);
		if(kind!=3){
			glBindTexture(GL_TEXTURE_2D, othertex[3].texID);
			glBegin(GL_QUADS);
				glTexCoord2d(blastNum*0.125f, 0.0f);		glVertex2f(-10.0f,-10.0f);
				glTexCoord2d(blastNum*0.125f+0.125f, 0.0f);	glVertex2f( 10.0f,-10.0f);
				glTexCoord2d(blastNum*0.125f+0.125f, 1.0f);	glVertex2f( 10.0f, 10.0f);
				glTexCoord2d(blastNum*0.125f, 1.0f);		glVertex2f(-10.0f, 10.0f);
			glEnd();
		}else{
			float temp=0.667*BOMB_BLAST_RANGE;
			glBindTexture(GL_TEXTURE_2D, othertex[2].texID);
			glBegin(GL_QUADS);
				glTexCoord2d(blastNum*0.125f, 0.0f);		glVertex2f(-temp,-temp);
				glTexCoord2d(blastNum*0.125f+0.125f, 0.0f);	glVertex2f( temp,-temp);
				glTexCoord2d(blastNum*0.125f+0.125f, 1.0f);	glVertex2f( temp, temp);
				glTexCoord2d(blastNum*0.125f, 1.0f);		glVertex2f(-temp, temp);
			glEnd();
		}
		glDisable(GL_TEXTURE_2D);
		glPopMatrix();

		// 爆炸参数更新
 		blastTime+=timer;
		if(blastTime>20){
			blastNum++;
			blastTime-=20;
		}
		
		// 炸弹爆炸清除范围内目标
		if(kind==3 && blastNum==4){
			// 清除范围内飞机
			for(int i=0; i<MAX_COMPUTER; i++){
				if(distance(computers[i].getX(),computers[i].getY(),x,y)<=BOMB_BLAST_RANGE && computers[i].getLife()>0){	
					computers[i].damaged(explodeLevel);
				}
			}
			// 清除范围内子弹
			for(i=0;i<MAX_AMMUNITION;i++){
				if(distance(ammunitions[i].getX(),ammunitions[i].getY(),x,y)<=BOMB_BLAST_RANGE
					&& ammunitions[i].getLife()>0
					&& ammunitions[i].getOwner()!=owner)
				{
					ammunitions[i].setLife(0);
					ammunitions[i].setExplosible(true);
				}
			}
		}
	}
}

// 绘制子弹
void Ammunition::draw()
{
	if(life>0)
	{
		glPushMatrix();
		glTranslatef(x, y, 0.0f);
		glEnable(GL_TEXTURE_2D);
		switch(kind)
		{
		case 0:			// 绘制普通的子弹
			{
				glBindTexture(GL_TEXTURE_2D, ammunitiontex[0].texID);
				glBegin(GL_QUADS);
					glTexCoord2i(0,0);glVertex2i(-3,-3);
					glTexCoord2i(1,0);glVertex2i( 3,-3);
					glTexCoord2i(1,1);glVertex2i( 3, 3);
					glTexCoord2i(0,1);glVertex2i(-3, 3);
				glEnd();
				break;
			}
		case 1:			// 绘制玩家的高级子弹
			{
				glBindTexture(GL_TEXTURE_2D, ammunitiontex[1].texID);
				glBegin(GL_QUADS);
					glTexCoord2i(0, 0);glVertex2i(-3,-3);
					glTexCoord2i(1, 0);glVertex2i( 3,-3);
					glTexCoord2i(1, 1);glVertex2i( 3, 3);
					glTexCoord2i(0, 1);glVertex2i(-3, 3);
				glEnd();
				break;
			}
		case 2:			// 绘制电脑的高级子弹
			{
				glBindTexture(GL_TEXTURE_2D, ammunitiontex[0].texID);
				glColor3f(0.0f, 1.0f, 1.0f);
				glBegin(GL_QUADS);
					glTexCoord2i(0, 0);glVertex2i(-5,-5);
					glTexCoord2i(1, 0);glVertex2i( 5,-5);
					glTexCoord2i(1, 1);glVertex2i( 5, 5);
					glTexCoord2i(0, 1);glVertex2i(-5, 5);
				glEnd();
				glColor3f(1.0f, 1.0f, 1.0f);
				break;
			}
		case 3:			// 绘制炸弹
			{
				glBindTexture(GL_TEXTURE_2D, ammunitiontex[3].texID);
				glBegin(GL_QUADS);
					glTexCoord2i(0, 0);glVertex2i(-15,-15);
					glTexCoord2i(1, 0);glVertex2i( 15,-15);
					glTexCoord2i(1, 1);glVertex2i( 15, 15);
					glTexCoord2i(0, 1);glVertex2i(-15, 15);
				glEnd();
				break;
			}
		default:
			break;
		}
		glDisable(GL_TEXTURE_2D);
		glPopMatrix();
	}
}

// 物品成员定义
// 由kind决定种类，分为0 高级子弹补给，1 炸弹补给，2 生命补给

// 初始化
Award::Award(float a,float b,float s,int l,int k):BaseObject(a,b,l,s,-1,k)
{
}


// 物品绘制
void Award::draw()
{
	if(life>0){
		glPushMatrix();
		glTranslatef(x, y, 0.0f);
		glEnable(GL_TEXTURE_2D);
		glBindTexture(GL_TEXTURE_2D, awardtex[kind].texID);
		glBegin(GL_QUADS);
			glTexCoord2f(0.0f,0.0f);glVertex2f(-10.0f,-10.0f);
			glTexCoord2f(1.0f,0.0f);glVertex2f( 10.0f,-10.0f);
			glTexCoord2f(1.0f,1.0f);glVertex2f( 10.0f, 10.0f);
			glTexCoord2f(0.0f,1.0f);glVertex2f(-10.0f, 10.0f);
		glEnd();
		glDisable(GL_TEXTURE_2D);
		glPopMatrix();
	}
}

// 物品移动
void Award::move()
{
	if(life>0){
		if(x>-240 && x<240 && y>-310 && y<300)
			y-=speed*timer/20;
		else
			life=0;
	}
}

// 判断物体是否被玩家飞机捡到
void Award::eat()
{
	if(life>0 && distance(x,y, myPlane.getX(),myPlane.getY())<30)
	{
		switch(kind)
		{
		case 0:			// 高级子弹补给
			{
				if(myPlane.getAmmunitionKind()==1){
					for(int i=0;i<40;i++){
						Ammunition t1(myPlane.getX(),myPlane.getY(),9*i,3,100.0f,1);
						t1.setOwner(1);
						ammunitions[ammunitionIndex++]=t1;
						if(ammunitionIndex==MAX_AMMUNITION)
							ammunitionIndex=0;
					}
				}
				myPlane.setAmmunitionKind(1);
				life=0;
				break;
			}
		case 1:			// 生命补给
			{
				if(myPlane.getLife()<50)
					myPlane.setLife(myPlane.getLife()+50);
				else if(myPlane.getLife()<100)
					myPlane.setLife(100);
				life=0;
				break;
			}
		case 2:			// 炸弹补给
			{
				myPlane.setBombNum(myPlane.getBombNum()+1);
				life=0;
				break;
			}
		default:
			break;
		}
		FSOUND_PlaySound(FSOUND_FREE,sound_3);
	}
}