main.cpp

SDL-Ball这款经典的弹球游戏克隆自arkanoid、dxball、breakout

          {
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row][bricknum+1]].hit(fxMan,spos,svel);
          }
        }
        
        if(row > 0)
        {
          if(nbrick[row-1][bricknum] != -1)
          {
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row-1][bricknum]].hit(fxMan,spos,svel);
          }
        }
        
        if(row < 22)
        {
          if(nbrick[row+1][bricknum] != -1)
          {
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row+1][bricknum]].hit(fxMan,spos,svel);
          }
        }
        
        if(row > 0 && bricknum > 0)
        {
          if(nbrick[row-1][bricknum-1] != -1)
          {
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row-1][bricknum-1]].hit(fxMan,spos,svel);
          }
        }
        if(row > 0 && bricknum < 25)
        {
          if(nbrick[row-1][bricknum+1] != -1)
          {       
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row-1][bricknum+1]].hit(fxMan,spos,svel);
          }
        }
        
        if(row < 22 && bricknum > 0)
        {
          if(nbrick[row+1][bricknum-1] != -1)
          {        
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row+1][bricknum-1]].hit(fxMan,spos,svel);
          }
        }

        if(row < 22 && bricknum < 25)
        {
          if(nbrick[row+1][bricknum+1] != -1)
          {
            svel.x=rndflt(2,0)/3.0;
            svel.y=rndflt(2,0)/3.0;
            bricks[nbrick[row+1][bricknum+1]].hit(fxMan,spos,svel);
          }
        }

        
      }
      
    }
    
    tex.play();
 
    glLoadIdentity();
    glTranslatef( 0.0f, 0.0f, -3.0 );
    glTranslatef( posx, posy, 0);
    
    glColor4f( color[0], color[1], color[2], opacity );

    glBindTexture(GL_TEXTURE_2D, tex.prop.texture);
    glBegin( GL_QUADS );
      glTexCoord2f(tex.pos[0],tex.pos[1]);glVertex3f( -0.0616*zoom, 0.035*zoom, 0.00 ); // øverst venst
      glTexCoord2f(tex.pos[2],tex.pos[3]);glVertex3f(  0.0616*zoom, 0.035*zoom, 0.00 ); // øverst højre
      glTexCoord2f(tex.pos[4],tex.pos[5]);glVertex3f(  0.0616*zoom,-0.035*zoom, 0.00 ); // nederst højre
      glTexCoord2f(tex.pos[6],tex.pos[7]);glVertex3f( -0.0616*zoom,-0.035*zoom, 0.00 ); // nederst venstre
    glEnd( );
   
    
  }
};


#include "loadlevel.cpp"

class moving_object : public object {
  public:
    GLfloat xvel,yvel,velocity;

    moving_object () {
      xvel=0.0;
      yvel=0.0;

    }

};

#include "effects.cpp"
#include "background.cpp"
void spawnpowerup(char powerup, pos a, pos b);

class bulletsClass {
  private:
    moving_object bullets[16];
  public:
    
  
    bulletsClass(textureClass & texBullet)
    {
      int i;
      for(i=0; i < 16; i++)
      {
        bullets[i].active=0;
        bullets[i].tex = texBullet;
        bullets[i].width = 0.02;
        bullets[i].height = 0.02;
      }
    }
  
    void shoot(pos p)
    {
      int i;
      //Find ledig bullet
      for(i=0; i < 16; i++)
      {
        if(!bullets[i].active)
        {
          bullets[i].active=1;
          bullets[i].posx = p.x;
          bullets[i].posy = p.y;
          bullets[i].xvel =0;
          bullets[i].yvel =1.0;
          break;
        }
      }
    }
    
    void move()
    {
      int i;
      for(i=0; i < 16; i++)
      {
        if(bullets[i].active)
        {
          //Flyt
          bullets[i].posy += bullets[i].yvel * globalMilliTicks;
        }
      }
    }
    
    void draw()
    {
      int i;
      glColor4f(1,1,1,1);
      for(i=0; i < 16; i++)
      {
        if(bullets[i].active)
        {
          //draw
          
          bullets[i].tex.play();
          
          glLoadIdentity();
          glTranslatef( bullets[i].posx, bullets[i].posy, -3.0 );
          
          glBindTexture(GL_TEXTURE_2D, bullets[i].tex.prop.texture);
          glBegin( GL_QUADS );
          glTexCoord2f(bullets[i].tex.pos[0],bullets[i].tex.pos[1]); glVertex3f( -bullets[i].width, bullets[i].height, 0.0 );
          glTexCoord2f(bullets[i].tex.pos[2],bullets[i].tex.pos[3]); glVertex3f(  bullets[i].width, bullets[i].height, 0.0 );
          glTexCoord2f(bullets[i].tex.pos[4],bullets[i].tex.pos[5]); glVertex3f(  bullets[i].width,-bullets[i].height, 0.0 );
          glTexCoord2f(bullets[i].tex.pos[6],bullets[i].tex.pos[7]); glVertex3f( -bullets[i].width,-bullets[i].height, 0.0 );
          glEnd( );
        }
      }
    }
    
    void coldet(brick & b, effectManager & fxMan)
    {
      int i;
      bool hit;
      pos v,p;
      v.x=0;
      v.y=bullets[0].xvel;
      
      for(i=0; i < 16; i++)
      {
        if(bullets[i].active)
        {
          hit=0;
        
          //y
          if(bullets[i].posy+bullets[i].height/10.0 > b.posy-b.height && bullets[i].posy+bullets[i].height/10.0 < b.posy+b.height)
          {
            p.x = b.posx;
            p.y = b.posy;
            //Venstre side:
            if(bullets[i].posx > b.posx-b.width && bullets[i].posx < b.posx+b.width)
            {
              hit=1;
            }
            
            if(hit)
            {
              b.hit(fxMan, p, v);
              
              if(!player.powerup[PO_THRU])
              {
                bullets[i].active=0;
              }
              
              p.x = bullets[i].posx;
              p.y = bullets[i].posy;
              
              if(setting.eyeCandy)
              {
                fxMan.set(FX_VAR_TYPE, FX_SPARKS);
                fxMan.set(FX_VAR_COLDET,1);
                fxMan.set(FX_VAR_LIFE, 1000);
                fxMan.set(FX_VAR_NUM, 16);
                fxMan.set(FX_VAR_SIZE, 0.015f);
                fxMan.set(FX_VAR_SPEED, 0.4f);
                fxMan.set(FX_VAR_GRAVITY, 1.0f);

                fxMan.set(FX_VAR_COLOR, 1.0f, 0.7f, 0.0f);
                fxMan.spawn(p);
                fxMan.set(FX_VAR_COLOR, 1.0f, 0.8f, 0.0f);
                fxMan.spawn(p);
                fxMan.set(FX_VAR_COLOR, 1.0f, 0.9f, 0.0f);
                fxMan.spawn(p);
                fxMan.set(FX_VAR_COLOR, 1.0f, 1.0f, 0.0f);
                fxMan.spawn(p);
              }
            }
          } else if(bullets[i].posy > 1.6)
          {
            bullets[i].active=0;
          }

        
        }
      }
    }
};

void brick::hit(effectManager & fxMan, pos poSpawnPos, pos poSpawnVel)
{
  pos p;
  //Afgør hvad der skal ske med denne brik udfra dens type og powerup egenskaber.
  //Hvis det ikke er en type 3, ELLER hvis der er powerup
  if(type != '3' || player.powerup[PO_THRU])
  {
    player.score += score;

    hitsLeft--;
    if(hitsLeft < 1 || type == 'B') //Hvis brikken er explosiv kan den ikke have nogle hits tilbage
    {
      collide=0;
  
      nbrick[row][bricknum]=-1;
  
      gVar.deadTime=0;
  
      spawnpowerup(powerup, poSpawnPos, poSpawnVel);
  
      if(setting.eyeCandy)
      {
        p.x = posx;
        p.y = posy;
        fxMan.set(FX_VAR_TYPE, FX_SPARKS);
        fxMan.set(FX_VAR_COLDET,1);
        fxMan.set(FX_VAR_LIFE, 1500);
        fxMan.set(FX_VAR_NUM, 16);
        fxMan.set(FX_VAR_SIZE, 0.025f);
        fxMan.set(FX_VAR_SPEED, -0.6f);
        fxMan.set(FX_VAR_COLOR, color[0],color[1],color[2]);
        fxMan.set(FX_VAR_GRAVITY, 0.6f);
        fxMan.spawn(p);
      }
      
      if(type=='B')
      {
        isexploding=1;
        
        if(setting.eyeCandy)
        {
          p.x = posx;
          p.y = posy;
          fxMan.set(FX_VAR_TYPE, FX_SPARKS);
          fxMan.set(FX_VAR_COLDET,1);
          fxMan.set(FX_VAR_LIFE, 1000);
          fxMan.set(FX_VAR_NUM, 16);
          fxMan.set(FX_VAR_SIZE, 0.1f);
          fxMan.set(FX_VAR_SPEED, 0.4f);
          fxMan.set(FX_VAR_GRAVITY, -1.0f);
    
          fxMan.set(FX_VAR_COLOR, 1.0f, 0.7f, 0.0f);
          fxMan.spawn(p);
          fxMan.set(FX_VAR_COLOR, 1.0f, 0.8f, 0.0f);
          fxMan.spawn(p);
          fxMan.set(FX_VAR_COLOR, 1.0f, 0.9f, 0.0f);
          fxMan.spawn(p);
          fxMan.set(FX_VAR_COLOR, 1.0f, 1.0f, 0.0f);
          fxMan.spawn(p);
        }
      } else {
        isdyingnormally=1;
      }
    } else { //No hits left
      tex.frame++;
      tex.play();
    } //Hits left
  }
}

glAnnounceTextClass announce;
//Slet mig måske
float abs2(float x)
{
      if (x<0) {return -x;}
      return x;
}
int LinesCross(float x0,float y0,float x1,float y1,float x2,float y2,float x3,float y3, float *linx, float *liny)
{
	float d=(x1-x0)*(y3-y2)-(y1-y0)*(x3-x2);
	if (abs2(d)<0.001f) {return -1;}
	float AB=((y0-y2)*(x3-x2)-(x0-x2)*(y3-y2))/d;
	if (AB>0.0 && AB<1.0)
	{
		float CD=((y0-y2)*(x1-x0)-(x0-x2)*(y1-y0))/d;
		if (CD>0.0 && CD<1.0)
        { 
			*linx=x0+AB*(x1-x0);
			*liny=y0+AB*(y1-y0);
			return 1;
        }
    }
	return 0;
}

//Leaves an trail of the ball
class tracer {
  private:
    GLfloat x[100], y[100], r[100], g[100], b[100], a[100],s[100], cr,cg,cb,;
    bool active[100];
    int color;
    GLfloat lastX, lastY; //Last position where we spawned one
  
  public:
    GLfloat height, width;
    GLuint texture;

    int len;
    void draw()
    {
      int i;
      for(i=0; i < len; i++)
      {
      
        if(active[i])
        {
          a[i] -= 4.0*globalMilliTicks;
          s[i] += 4.0*globalMilliTicks;
          if(a[i] < 0.0)
            active[i]=0;

          glBindTexture( GL_TEXTURE_2D, texture);
          glLoadIdentity();
          glTranslatef(x[i],y[i],-3.0);
          glColor4f(r[i], g[i], b[i], a[i]);
          glBegin( GL_QUADS );
            glTexCoord2f(0.0, 0.0);glVertex3f( -width*s[i], height*s[i], 0.00 ); // øverst venst
            glTexCoord2f(0.0, 1.0);glVertex3f(  width*s[i], height*s[i], 0.00 ); // øverst højre
            glTexCoord2f(1.0, 1.0);glVertex3f(  width*s[i],-height*s[i], 0.00 ); // nederst højre
            glTexCoord2f(1.0, 0.0);glVertex3f( -width*s[i],-height*s[i], 0.00 ); // nederst venstre
          glEnd( );
        }
      }
    }
    
    void colorRotate(bool explosive, GLfloat c[])
    {
      color++;
      if(color > 5)
        color=0;
        
      if(!explosive)
      {
        cr=c[0];
        cg=c[1];
        cb=c[2];
      } else {
        cr=1.0;
        cg=0.6;
        cb=0.0;
      }
    }
    
    tracer()
    {
      len=100;
      lastX=0;
      lastY=0;
      cr=1;
      cg=0;
      cb=0;
      height = 0.01;
      width = 0.01;
      int i;
      for(i=0; i < 100; i++)
      {
        active[i]=0;
      }
    }
    
    void update(GLfloat nx, GLfloat ny)
    {
      //If long enough away
      GLfloat dist = sqrt( pow(nx-lastX, 2) + pow(ny-lastY, 2) );
      if(dist > 0.01)
      {
        lastX = nx;
        lastY = ny;
        //Find en ledig
        int i;
        for(i=0; i < len; i++)
        {
          if(!active[i])
          {
            active[i]=1;
            a[i]=1.0; //tweak me
            x[i]=nx;
            y[i]=ny;
            s[i]=1.0;
            r[i]=cr;
            g[i]=cg;
            b[i]=cb;
            break;
          }
        }
      }
    }


};

class ball : public moving_object {
  private:
  GLfloat rad;
  bool growing,shrinking;
  GLfloat destwidth, growspeed;
  tracer tail;
  
  public:
  int died; //When did this ball get gravity?
  
  bool gravity; //did we get gravity
  bool explosive; //Makes brick explosive (to get a explosion effect) and explode it
  
  bool glued; //Sidder vi fast på padden for øjeblikket?
  GLfloat gluedX;
  //Variabler med forududregnede værdier
  GLfloat bsin[32], bcos[32];
  
  bool aimdir;
  textureClass fireTex, texTail;
  
  GLfloat lastX,lastY;
  ball() {
    growing=0;
    growspeed=0.1;
    width=0.0;
    height=0.0;
    glued=0;
    posx=0.0f;
    posy=0.0f;
    setSize(0.02);
    aimdir=0;
  }
  
  void hit(pos p, GLfloat c[])
  {
    if(gravity)
    {
      yvel /= 1.4;
      xvel /= 1.01;
      posy = p.y+height;
      if(globalTicks-died > 6000)
      {
        active=0;
      }
    }
      
      if(setting.eyeCandy)
        tail.colorRotate(explosive, c);
  }
  
  void move()
  {
 
    //vi laver lige den her coldet her...
    if(posx+width > 1.6 && xvel > 0.0)
    {
      xvel *= -1;
    } else if(posx-width < -1.6 && xvel < 0.0)
    {
      xvel *= -1;
    } else if(posy+width > 1.25 && yvel > 0.0)
    {
      yvel *= -1;
    } else if(posy-width < -1.24)
    {
      active=0;
    }

    if(gravity)
    {
      if(yvel != 0)
        yvel -= 0.6*globalMilliTicks;
    }
    
    posx +=xvel*globalMilliTicks;
    
    if(!glued)
    {
      posy +=yvel*globalMilliTicks;
    } else {
      gVar.deadTime = 0;
    }
    
    if(setting.eyeCandy)
      tail.update(posx,posy);

  }