class.cpp

一个小飞机游戏

#include <windows.h>
#include <math.h>
#include <gl\gl.h>

#include "Class.h"
#include "fmod.h"
#include "texture.h"

//各变量定义:
extern TextureTga	playertex[3];				// 纹理数组，保存纹理名字
extern TextureTga  computertex[3];
extern TextureTga	ammunitiontex[4];
extern TextureTga	awardtex[3];
extern TextureTga	othertex[4];

extern PlayerPlane myPlane;					// 我方飞机
extern ComputerPlane computers[MAX_COMPUTER];	// 电脑飞机数组
extern Ammunition ammunitions[MAX_AMMUNITION];		// 子弹数组
extern Award awards[MAX_AWARD];			// 物品数组
int ammunitionIndex=0;
int awardIndex=0;

extern FSOUND_SAMPLE *sound_1;			// 发射子弹的声音指针
extern FSOUND_SAMPLE *sound_2;			// 射击中的声音指针
extern FSOUND_SAMPLE *sound_3;			// 遇到物品的声音指针
extern FSOUND_SAMPLE *sound_4;			// 游戏的背影音乐指针

extern int myPlaneNum;					// 我方目前余下的飞机数目
extern bool end;						// 控制游戏结束的布尔值
extern DWORD endtime;					// 结束动画的起始时间
extern int timer;						// 这一帧的运行时间

// 计算点(x1,y1)与点(x2,y2)的距离
float distance(float x1,float y1,float x2,float y2)
{
	return (float)sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
}

// 玩家飞机类定义
// 玩家飞机初始化
void PlayerPlane::initPlane(float a,float b,int l,float s)
{
	x=a;
	y=b;
	life=l;
	speed=s;

	blastNum=0;
	blastTime=0;

	bombNum=START_BOMB_NUMBER;
	planeTexture=0;
	fireTime=0;
	ammunitionKind=0;
	score=0;
}
PlayerPlane::PlayerPlane(float a,float b,int l,float s)
{
	initPlane(a,b,l,s);
}

// 更新飞机
void PlayerPlane::update()
{
	if (life<=0&&blastNum==8){		// 玩家飞机爆炸完毕
		myPlaneNum--;
		if (myPlaneNum!=0){			// 玩家还有剩余飞机
			int temp=score;
			initPlane(0,-230,100,2);
			score=temp;
		}else{
			// 游戏结束(失败)
			endtime=GetTickCount();
			end=true;
		}
	}else if(score>=WIN_SCORE){		// 游戏结束(胜利)
		endtime=GetTickCount();
		end=true;
	}
}

// 发射子弹
void PlayerPlane::fire()
{
	if(life>0){
		fireTime+=timer;
		if(fireTime>100){
			Ammunition t1(x-12,y+1,90,4,100.0f,ammunitionKind);	
			Ammunition t2(x+12,y+1,90,4,100.0f,ammunitionKind);
			t1.setOwner(1);
			t2.setOwner(1);
			
			ammunitions[ammunitionIndex++]=t1;
			if(ammunitionIndex==MAX_AMMUNITION)
				ammunitionIndex=0;

			ammunitions[ammunitionIndex++]=t2;
			if(ammunitionIndex==MAX_AMMUNITION)
				ammunitionIndex=0;

			fireTime-=100;
		}
	}
}

// 发射炸弹
void PlayerPlane::fireBomb()
{
	if(life>0 && bombNum>0){
		Ammunition t1(x,y+30,90,4,100.0f,3);
		t1.setOwner(1);
		ammunitions[ammunitionIndex++]=t1;
		if(ammunitionIndex==MAX_AMMUNITION)
			ammunitionIndex=0;
		bombNum--;
	}
}

// 检测并绘制飞机爆炸
void PlayerPlane::blast()
{
	if(life<=0){
		blastTime+=timer;
		if(blastNum<8){
			// 绘制爆炸图像
			glPushMatrix();
			glTranslatef(x, y, 0.0f);
			glEnable(GL_TEXTURE_2D);
			glBindTexture(GL_TEXTURE_2D, othertex[2].texID);
			glBegin(GL_QUADS);
				glTexCoord2d(blastNum*0.125f,0);	glVertex2f(-50.0f,-50.0f);
				glTexCoord2d((blastNum+1)*0.125f,0);glVertex2f( 50.0f,-50.0f);
				glTexCoord2d((blastNum+1)*0.125f,1);glVertex2f( 50.0f, 50.0f);
				glTexCoord2d(blastNum*0.125f,1);	glVertex2f(-50.0f, 50.0f);
			glEnd();
			glDisable(GL_TEXTURE_2D);
			glPopMatrix();
			// 更新爆炸相关参数
			if(blastTime>30){
				if(blastNum==0)
					FSOUND_PlaySound(FSOUND_FREE,sound_2);
				blastNum++;
				blastTime=0;
			}
		}
	}
}

// 检测飞机是否相撞
void PlayerPlane::hitcomPlane()
{
	if(life>0){
		for(int i=0; i<MAX_COMPUTER; i++){
			if(distance(x,y,computers[i].getX(),computers[i].getY())<30 && computers[i].getLife()>0){
				life-=100;							// 飞机相撞,生命值减少100
				computers[i].setLife(0);			// 对方飞机爆炸
				computers[i].setExplosible(true);
				return ;
			}
		}
	}
}

// 飞机向上移动
void PlayerPlane::moveUp()
{
	if(y<280 && life>0){
		y+=speed*timer/20;
		planeTexture=0;
	}
}

// 飞机向下移动
void PlayerPlane::moveDown()
{
	if(y>-230 && life>0){
		y-=speed*timer/20;
		planeTexture=0;
	}
}

// 飞机向右移动
void PlayerPlane::moveRight()
{
	if(life>0){
		planeTexture=2;
		if(x<230.0){
			x+=speed*timer/20;
		}
	}
}

// 飞机向左移动
void PlayerPlane::moveLeft()
{
	if(life>0){
		planeTexture=1;
		if(x>-230.0){
			x-=speed*timer/20;
		}
	}
}

// 飞机原地不动
void PlayerPlane::stay()
{
	if(life>0)
		planeTexture=0;
}

// 绘制飞机
void PlayerPlane::draw()
{
	if(life>0){
		glPushMatrix();
		glTranslatef(x, y, 0.0f);
		glEnable(GL_TEXTURE_2D);
		glBindTexture(GL_TEXTURE_2D, playertex[planeTexture].texID);
		// 设置飞机颜色
		if(life>50)
			glColor3f(1.0f, 1.0f, 1.0f);
		else
			glColor3f(0.7f, 0.7f, 0.7f);
		glBegin(GL_QUADS);
			glTexCoord2i(0.0f, 0.0f);glVertex2i(-20,-20);
			glTexCoord2i(1.0f, 0.0f);glVertex2i( 20,-20);
			glTexCoord2i(1.0f, 1.0f);glVertex2i( 20, 20);
			glTexCoord2i(0.0f, 1.0f);glVertex2i(-20, 20);
		glEnd();
		glColor3f(1.0f, 1.0f, 1.0f);
		glDisable(GL_TEXTURE_2D);
		glPopMatrix();
	}
}

// 电脑飞机类成员定义
ComputerPlane::ComputerPlane(float a,float b,int l,float d,float s,int k):BaseObject(a,b,l,s,d,k)
{
	fireTime=0;
}


// 电脑飞机的种类分为0，1，2三种，对于不同的种类，将会有不同的生命值和子弹属性等。
void ComputerPlane::setKind(int k)
{
	if(k==0){
		kind=0;
		speed=2;
		life=150;
		rewardScore=100;
	}else if(k==1){
		kind=1;
		speed=3;
		life=100;
		rewardScore=200;
	}else if(k==2){
		kind=2;
		speed=1;
		life=200;
		rewardScore=500;
	}
}

// 电脑飞机初始化
void ComputerPlane::compinit()
{
	x=(float)(rand()%500-250);
	y=(float)(rand()%100+300);
	direction=(float)(rand()%90-135);
	blastNum=0;
	explosible=false;
	// 初始化电脑飞机种类kind
	int temp=rand()%8;
	if(temp<=4)
		setKind(0);
	else if(temp==5 || temp==6)
		setKind(1);
	else if(temp==7)
		setKind(2);
}

// 更新电脑飞机
void ComputerPlane::update()
{
	if(life<=0 && blastNum==8 && explosible || life<=0 && !explosible){
		compinit();
		blastNum=0;
	}
}

// 绘制电脑飞机
void ComputerPlane::draw()
{
	if(life>0){
		glPushMatrix();
		glTranslatef(x, y, 0.0f);
		glEnable(GL_TEXTURE_2D);
		glBindTexture(GL_TEXTURE_2D, computertex[kind].texID);
		glBegin(GL_QUADS);
			glTexCoord2i(0, 0);glVertex2i(-25,-25);
			glTexCoord2i(1, 0);glVertex2i( 25,-25);
			glTexCoord2i(1, 1);glVertex2i( 25, 25);
			glTexCoord2i(0, 1);glVertex2i(-25, 25);
		glEnd();
		glDisable(GL_TEXTURE_2D);
		glPopMatrix();
	}
}

// 电脑飞机移动
void ComputerPlane::move()
{
	if(x>-275 && x<275 && y>-325){
		x=x+speed*cos(direction/180*PI)*timer/20;
		y=y+speed*sin(direction/180*PI)*timer/20;
	}else{
		life=0;
		explosible=false;
	}
}

// 电脑飞机移动以及子弹发射
void ComputerPlane::fire()
{
	if(life>0){
		fireTime+=timer;
		// 射击速度随机
		if((fireTime>1000+rand()%5000) && y>-100){
			if(kind==0){
				Ammunition t1(x,y-25,-90,3,100.0f,0);
				t1.setOwner(3);
				ammunitions[ammunitionIndex++]=t1;
				if(ammunitionIndex==MAX_AMMUNITION)
					ammunitionIndex=0;
				fireTime=0;
			}else if(kind==1){
				int temp=atan((myPlane.getY()-(y-25))/(myPlane.getX()-x))/PI*180;
				if(myPlane.getX()<x)		// 若飞机在子弹的左边，则加180度
					temp+=180;
				Ammunition t1(x,y-25,temp,3,100.0f,0);
				t1.setOwner(3);
				ammunitions[ammunitionIndex++]=t1;
				if(ammunitionIndex==MAX_AMMUNITION)
					ammunitionIndex=0;
				fireTime=0;
			}else if(kind==2){
				Ammunition t1(x,y-25,-90,3,100.0f,2);
				t1.setOwner(3);
				ammunitions[ammunitionIndex++]=t1;
				if(ammunitionIndex==MAX_AMMUNITION)
					ammunitionIndex=0;
				fireTime=0;
			}