Colliding Quarks

//// OO example:  Quarks move and collide.

////  Swap velocities, when balls hit.

////  Expandable version -- change many to add balls.

​

String title="Colliding quarks.";

String author="BAM 3B15";

​

int numButtons=10;

Button[] b = new Button[numButtons];

​

​

Quark[] salad;

int many=3;

int score=0;

int speed=30;

​

​

  int num=0;

  float dd=50;    // Distance from walls.

​

​

float x1,x2, y1,y2;    // Boundaries of table.

​

​

void setup() {

  //// Setup:  600x400 (for 500x300 table).

  size(600,400);

  x1=50; x2=width-50;

  y1=50; y2=height-50;

  initialize();

  frameRate( speed );

  // Make the buttons

  b[0]=  new Button( "MORE", 50, 100, 255,0,0 );

  b[1]=  new Button( "FEWER", 50, 150, 0,255,0 );

  b[2]=  new Button( "ZERO", 50, 250, 255,0,255 );

  b[3]=  new Button( "RESET", 50, 250, 255,0,255 );

  b[4]=  new Button( "0", 50, 250, 255,0,255 );

  b[5]=  new Button( "1", 50, 300, 128,255,0 );

  b[6]=  new Button( "reset", 50, 350, 128,128,255 );

  //

  b[7]=  new Button( "FASTER", width-50, 200, 255,255,0 );

  b[8]=  new Button( "SLOWER", width-50, 250, 255,0,255 ); 

  //

  b[9]=  new Button( "QUIT", width-50, height-50, 0,255,255 );

  b[9].w=  75;

  b[9].kind=  1;

}

/*

  if (key=='S') { speed++; }

  if (key=='s') { if (speed>0) speed--; }

  //

  if (key=='+') {    many++;  initialize();  }

  if (key=='-') {    many--;  many= many<1 ? 1 : many;   initialize();  }

  if (key=='0') {    many=0;  initialize();  }

  if (key=='1') {    many=0;  initialize();  }

​

*/

void initialize() {

  //// Give each quark a starting position.

  salad =  new Quark[many];          // New array!  

  num=0;

  ////  Initialize each quark with a random color.

  for (int j=0; j<salad.length; j++) {

    salad[j]=  new Quark( num );  

    num++;    

  }

}

void keyPressed() {

  //// "Q" quits game.

  if (key=='Q') {

    exit();

  }

  //// Restart.

  if (key=='R') {

    initialize();

  }

  if (key=='S') { speed++; }

  if (key=='s') { if (speed>0) speed--; }

  //

  if (key=='+') {    many++;  initialize();  }

  if (key=='-') {    many--;  many= many<1 ? 1 : many;   initialize();  }

  if (key=='0') {    many=0;  initialize();  }

  if (key=='1') {    many=0;  initialize();  }

}

​

void mousePressed() {

  ////

  if ( b[0].isOver(mouseX,mouseY) ) {    many++;  initialize(); }

  if ( b[1].isOver(mouseX,mouseY) ) {    many--;  }

  if ( b[2].isOver(mouseX,mouseY) ) {    many=0; initialize();  }

  if ( b[3].isOver(mouseX,mouseY) ) {    initialize();  }

​

  if ( b[7].isOver(mouseX,mouseY) ) {    speed++;  }

  if ( b[8].isOver(mouseX,mouseY) ) {    speed--;  }

  if ( b[9].isOver(mouseX,mouseY) ) {    exit();  }

​

/*

  //// Restart.

  if ( b[0].click(mouseX,mouseY) ) {    initialize();  }

​

  if (key=='S') { speed++; }

  if (key=='s') { if (speed>0) speed--; }

  //

  if (key=='+') {    many++;  initialize();  }

  if (key=='-') {    many--;  many= many<1 ? 1 : many;   initialize();  }

  if (key=='0') {    many=0;  initialize();  }

  if (key=='1') {    many=0;  initialize();  }

  */

}

​

​

​

​

void draw() {

  //// Table, with billiard balls.

  frameRate( speed );

  scene();

  action();

  display();

​

  //// Draw the buttons

  for (int j=0; j<numButtons; j++) {

    b[j].show();

  }

​

​

  //// Text on screen ////

  fill(0);

  textSize(20);

  text( title, width/3, 20);

  textSize(12);

  text( "many = "+many, 10, 10 );

  text( author, 10, height-20);

  //

  text( "R to restart with " +many+ " quarks", width*2/3, height-25);

  text( "+/-/0 to increase/decrease/zero", width*2/3, height-10);

  text( "speed = "+speed, width/3, height-25);

  text( "S/s for speed-up/slow-down", width/3, height-10);

  //

  fill( 255,0,0);

  text( "SCORE:  "+score, 400, 15 );

  fill( 255,255,255);

}

​

void  scene() {

  //// Draw the table.

  background( 200,150,100 );    // Tan bg.

  fill( 0,0,200);

  //// Table:

  fill( 150,200,150 );          // Light-green table.

  stroke( 100,50,50 );          // Brown (wood) rail.

  strokeWeight(25);

  rectMode(CORNER);

  rect(50,50, 500,300);        // Table (with rail);

}

​

void  display() {

  //// Draw all quarks.

  for (int i=0; i<many; i++) {

    salad[i].show();

  }

}

​

​

void  action() {

  //// Move each object, based on its velocity (dx,dy),

  for (int i=0; i<many; i++) {

    salad[i].move();

  }

  //// Check for collisions.

  for (int j=0; j<many; j++) {

    for (int k=j+1; k<many; k++) {        // Start with NEXT quark.

      if (hit( salad[j], salad[k] )) {

        //// Check for collisions; reverse both if hit.

        salad[j].counter++;

        salad[k].counter++;

        score -= 10;

        salad[j].dx *= -1;

        salad[j].dy *= -1;

        salad[k].dx *= -1;

        salad[k].dy *= -1;

        salad[j].timer=30;

        salad[k].timer=30;

        fill(0); text( j +" HIT "+ k, salad[j].x+20, salad[j].y-10 );

        //// Add extra move (bouncing away), to avoid "ringing"

        salad[j].move();  salad[j].move();

        salad[k].move();  salad[k].move();  salad[k].move();

      }// End collision code.//

    }// End inner loop.//

  }// End outer loop.//

  //// Proclaim the winner:

  int winner=0;

  for (int j=1; j<many; j++) {

    if (salad[j].counter > salad[winner].counter) { winner=j; }

  }

  fill(0,0,0);

  text( "Winner is "+winner, 10,30 );

}

boolean hit( Quark p, Quark q ) {

  //// True if p hits q

  return dist( p.x,p.y, q.x,q.y) < p.d/2 ;

}

​

​

​

class Quark {

  float x=0,y=0;    // Position of this ball.

  float dx=3,dy=2;  // Velocity (pixels per frame).

  int r,g,b;        // Color (RGB)

  int number;

  String name="";

  float d=30;      // diameter

  int counter=0;

  int timer=0;

​

  //// CONSTRUCTORS ////

  Quark( int r, int g, int b ) {

    this.r=r; this.g=g; this.b=b;

  }

  Quark( int num ) {

    this.r=  int(random(255));

    this.g=  int(random(255));

    this.b=  int(random(255));

    x=  random( x1+dd, x2-dd );

    y=  random( y1+dd, y2-dd );

    number=  num;

  }

  /*

    salad[j]=  new Quark( int(random(255)), int(random(255)), int(random(255)) );  

    salad[j].x=  random( x1+dd, x2-dd );

    salad[j].y=  random( y1+dd, y2-dd );

    salad[j].number=  num++;

​

  */

​

  //// METHODS  ////

  void move() {

    //// Move quark by (dx,dy)

    x=  x + dx;

    y=  y + dy;

    // Bounce off walls.

    if (x < x1+d )  {  dx=  -dx; }

    if (x > x2-d ) {  dx=  -dx; }

    if (y < y1+d )  {  dy=  -dy; }

    if (y > y2-d ) {  dy=  -dy; }

  }

  void show() {

    //// Draw at (x,y)

    fill(r,g,b);

    noStroke();

    ellipseMode(CENTER);

    ellipse(x,y, d,d );

    fill( (r+128)%256, (g+128)%256, (b+128)%256 );    // Contrasting color.

    textSize(18);

    text(number, x-8, y+3);

    textSize(12);

    //// Check timer for red ring.

    if (timer>0) {

      stroke(r,g,b);

      strokeWeight(6);

      fill(255,0,0, constrain( timer*5,0,255  ) );

      ellipse( x, y, d*2, d*2 );  

      timer--;

      fill(0);

      text(timer,x+45,y);

    }

  }

}//class//

​

​

class Button {

 //// Different kinds of button ////

 int kind=2;    // 1 for ellipse, 2 for rect, 3 for triangle, 4 for square.

 float x=25, y;

 float w=80,h=30;

 String s="";

 int r,g,b;

 float size=1;

 //// CONSTRUCTORS ////

 Button( String s, float x, float y, int r, int g, int b ) {

   this.s=  s;

   this.x=  x;

   this.y=  y;

   this.r=  r;

   this.g=  g;

   this.b=  b;

 }

 //// METHODS ////

 void show() {

   // Draw it //

   stroke(0);

   strokeWeight(2);

   fill( r, g, b );

   //

   size=1;

   if ( isOver(mouseX,mouseY) ) {  size=1.25;  }

​

   if (kind == 1 ) {

       ellipseMode( CENTER );

       ellipse(x,y, w*size,h*size);

   } else if (kind == 2  ||  kind == 4) {

       rectMode( CENTER );

       rect(x,y, w*size,h*size);

   } else if (kind == 3) {

       triangle( x-w/2,y+h/2, x+w/2,y+h/2, x,y=h/2 );

   } else {

        text( "NO SUCH KIND OF BUTTON "+kind, x, y );

   }

   fill( 0 );

   text( s, x-w/2+20, y );

 }

 boolean isOver( float xx, float yy ) {

   // True if mouseX, mouseY iis over this button.

   if (kind == 1 ) return dist(xx,yy, x,y) < w;

   if (xx < x-w) return false;

   if (xx > x+w) return false;

   if (yy < y-h) return false;

   if (yy > y+h) return false;

   return true;

 }

}// class Button //

​

​

​

​