func.cpp

本人这两天在linux下用qt作的益智小游戏

#include"mywidget.h"
#include<math.h>
#include<iostream.h>
//two steps ghost may walk
   int ghost_step[16][4]={
                          {1,0,0,0},{1,0,1,0},
			  {1,0,0,1},{1,0,0,-1},
			  {-1,0,0,0},{-1,0,-1,0},
			  {-1,0,0,1},{-1,0,0,-1},
			  {0,1,0,0},{0,1,1,0},
			  {0,1,-1,0},{0,1,0,1},
			  {0,-1,0,0},{0,-1,1,0},		  
			  {0,-1,-1,0},{0,-1,0,-1}
                          };
   
//check the ascii of the button pressed
void MyWidget::setButton(int ascii)
{
    
       switch(ascii)
       {
       case Qt::Key_W:
       case Qt::Key_Up:
	   step[0]=0;
	   step[1]=-1;
	   state=0;
	   emit walk(step);
	   break;
       case Qt::Key_S:
       case Qt::Key_Down:
	   step[0]=0;
	   step[1]=1;
	   state=2;
	   emit walk(step);
	   break;
       case Qt::Key_A:
       case Qt::Key_Left:
	   step[0]=-1;
	   step[1]=0;
	   state=3;
	   emit walk(step);
	   break;
       case Qt::Key_D:
       case Qt::Key_Right:
	   step[0]=1;
	   step[1]=0;
	   state=1;
	   emit walk(step);
	   break;
       case Qt::Key_F:
	   step[0]=0;
	   step[1]=0;
	   state=4;
	   emit walk(step);
	   break;
       default:
	   button=0;
	   break;
       }   
}
//judge whether the charactor is trying to walk through wall or door
bool MyWidget::judgement(int who,int *ppos,int *sstep)
{
    int posH,posV=0;
    if(sstep[0]==0&&sstep[1]==0)
	return true;
    if(sstep[1]==0&&sstep[0]!=0)
    {
	posH=ppos[1];
	if(sstep[0]==1)
	    posV=ppos[0]+1;
	else
	    posV=ppos[0];
	if(wallH_vector[posH][posV]==1)
	    return false;
	else if(who==0&&wallH_vector[posH][posV]==2)
	{
	    emit good();
	    return false;
	}
	else
	    return true;
    }
    if(sstep[0]==0&&sstep[1]!=0)
    {
	posH=ppos[0];
	if(sstep[1]==1)
	    posV=ppos[1]+1;
	else
	    posV=ppos[1];
	if(wallV_vector[posH][posV]==1)
	    return false;
	else if(who==0&&wallV_vector[posH][posV]==2)
	{
	    emit good();
	    return false;
	}
	else
	    return true;
    }
    
}
//animate the charactor when they are walking
//here,use the method of repainting to delay 
void MyWidget::go(int who,int *ppos,int *sstep)
{ 
    QPainter paint;
    QPixmap character("./pic/character.png");
    QLabel *c=new QLabel(r);
    if(who==0)
    {
	state=man_state;
	c=m;
    }
    else
    {
	state=ghost_state;
	c=g;
    }
    int i;
    
    for(i=0;i<3;i++)
    {	
	distH=24+16*ppos[0]+4*i*sstep[0];
	distV=21+16*ppos[1]+4*i*sstep[1];
	c->move(distH,distV);
	paint.begin(c);
	paint.drawPixmap(0,0,*pic,distH,distV,16,16);
	paint.drawPixmap(0,0,character,state+16*i,32*who,16,16);
	paint.end();
	int n=4000;
	while((--n)!=0)
	{
	    paint.begin(c); 
	    paint.drawPixmap(0,0,character,state+16*i,32*who,16,16);
	    paint.end();
	}
    }
    for(i=1;i>=0;i--)
    {
	distH=24+16*ppos[0]+16*sstep[0]-4*i*sstep[0];
	distV=21+16*ppos[1]+16*sstep[1]-4*i*sstep[1];
	c->move(distH,distV);
	paint.begin(c);
	paint.drawPixmap(0,0,*pic,distH,distV,16,16);
	paint.drawPixmap(0,0,character,state+16*i,32*who,16,16);
	paint.end();
	int n=4000;
	while((--n)!=0)
	{
	    paint.begin(c); 
	    paint.drawPixmap(0,0,character,state+16*i,32*who,16,16);
	    paint.end();
	}
    }
}
//ghost goes horizontally first,and choose the position closest to girl
int gStep1[2],gStep2[2];
void MyWidget::ghost_walk()
{ 
    gStep1[0]=0;
    gStep1[1]=0;
    gStep2[0]=0;
    gStep2[1]=0;    
    int temp_step1[2],temp_step2[2];
    int s1[2],s2[2];
    int distance,tempDist,mov=0;
    int state1=4,state2=4;
    distance=abs(ghost_position[0]-man_position[0])+
	     abs(ghost_position[1]-man_position[1]);
    int i;
    for(i=0;i<8;i++)
    { 
	temp_step1[0]=ghost_step[i][0];
	temp_step1[1]=ghost_step[i][1];
	if(judgement(1,ghost_position,temp_step1))
	{
	    s1[0]=ghost_position[0]+temp_step1[0];
	    s1[1]=ghost_position[1]+temp_step1[1];
	    temp_step2[0]=ghost_step[i][2];
	    temp_step2[1]=ghost_step[i][3];
	    if(judgement(1,s1,temp_step2))
	    {	
		s2[0]=temp_step2[0]+s1[0];
		s2[1]=temp_step2[1]+s1[1];
		tempDist=abs(s2[0]-man_position[0])+
			 abs(s2[1]-man_position[1]);
		if(tempDist<distance)
		{
		    gStep1[0]=temp_step1[0];
		    gStep1[1]=temp_step1[1];
		    gStep2[0]=temp_step2[0];
		    gStep2[1]=temp_step2[1];
		    if(ghost_step[i][0]==1)
			state1=1;
		    else
			state1=3;
		    if(ghost_step[i][3]==0)
		    {
			if(ghost_step[i][2]==-1)
			    state2=3;
			else if(ghost_step[i][2]==1)
			    state2=1;
			else
			    state2=4;
		    }
		    else
		    {
			if(ghost_step[i][3]==1)
			    state2=2;
			else
			    state2=0;
		    }
		    distance=tempDist;
		    mov=1;
		}
	    }
	}
    }
    if(mov==0)
    {
	for(i=8;i<16;i++)
	{
	    temp_step1[0]=ghost_step[i][0];
	    temp_step1[1]=ghost_step[i][1];
	    if(judgement(1,ghost_position,temp_step1))
	    {	
		s1[0]=ghost_position[0]+temp_step1[0];
		s1[1]=ghost_position[1]+temp_step1[1];
		temp_step2[0]=ghost_step[i][2];
		temp_step2[1]=ghost_step[i][3];
		if(judgement(1,s1,temp_step2))
		{	
		    s2[0]=temp_step2[0]+s1[0];
		    s2[1]=temp_step2[1]+s1[1];	 
		    tempDist=abs(s2[0]-man_position[0])+
			     abs(s2[1]-man_position[1]);	 
		    if(tempDist<distance)
		    {
			gStep1[0]=temp_step1[0];
			gStep1[1]=temp_step1[1];
			gStep2[0]=temp_step2[0];
			gStep2[1]=temp_step2[1];
			if(ghost_step[i][1]==1)
			    state1=2;
			else
			    state1=0;
			 if(ghost_step[i][3]==0)
			{
			     if(ghost_step[i][2]==-1)
				 state2=3;
			     else if(ghost_step[i][2]==1)
				 state2=1;
			     else
				 state2=4;
			 }
			 else
			 {
			     if(ghost_step[i][3]==1)
				 state2=2;
			     else
				 state2=0;
			 }
			 distance=tempDist;		    
		     }
		}		 
	    }    
	}
    } 
    
    if(state1<4)
    {
	ghost_state=48*state1;
	go(1,ghost_position,gStep1);
	ghost_position[0]+=gStep1[0];
	ghost_position[1]+=gStep1[1];
    }
    if(state2<4)
    {
	ghost_state=48*state2;
	go(1,ghost_position,gStep2);
	ghost_position[0]+=gStep2[0];
	ghost_position[1]+=gStep2[1];	
    }	
    distH=24+16*man_position[0];
    distV=21+16*man_position[1];
    //record ghost's path
    p1->ghostPath1[0]=gStep1[0];
    p1->ghostPath1[1]=gStep1[1];
    p1->ghostPath2[0]=gStep2[0];
    p1->ghostPath2[1]=gStep2[1];
    p1->ghostS1=state1;
    p1->ghostS2=state2;    
    p.push(p1);
    
    if(man_position[0]==ghost_position[0]&&
       man_position[1]==ghost_position[1])
	emit over();    
   
    button=0;
}

void MyWidget::mousePressEvent(QMouseEvent *event)
{
    curPos[0]=event->x();
    curPos[1]=event->y()-85;  //get the mouse's position in the map
    emit cursor_pos(curPos);
}

void MyWidget::keyReleaseEvent(QKeyEvent *event)
{  
	if(button==0)
	{   	     
	    ascii=event->key();
	    button=1;
	    setButton(ascii);
	}  
}