Changing Shapes in Classes

hxppy

How would I incorporate a changing shape command in a sketch which that I have a class in. I want to change the circles to a rectangle every 3 seconds. Sorry this is like my 3rd forum regarding the changing of shapes.

Below is my code:

/* This sketch is based one the Bounce example
 * 
 * When the shape hits the edge of the window, it reverses its direction. 
 */

/*Ball b = new Ball(); //creates an object from Ball
 Ball c= new Ball(); //creates an object from Ball
 Ball d= new Ball(); //creates an object from Ball*/
int numberOfBalls = 2; //this variable controls how many Balls
Ball[] bob = new Ball[numberOfBalls]; //this creates an array of Balls

//make an array list with a flexible number of objects in it
ArrayList<Ball> bobslist = new ArrayList<Ball>();

//FRAME COUNT (TIMER)

float shape;

 if (frameCount%120==0) { //code runs every 2 seconds
    shape=!shape;

void setup() 
{
  size(800, 500);
  noStroke();
  frameRate(30);
  ellipseMode(RADIUS);
  // Set the starting position of the shape
  //loop to create 10 (numberOfBalls) Ball objects in the Ball array
  for ( int i=0; i<numberOfBalls; i=i+1) {
    bob[i] = new Ball(width/2, height/2); //this creates Ball object in the array spaces from 0 to 1 to 2 to....numberOfBalls
  }
}

void draw() 
{
  background(#6593B9);
  /* b.move(); //this is one ball only - I want lots!
   b.display(); */  //the */ is used to comment long lines of code

  for ( int i=0; i<numberOfBalls; i=i+1) {
    bob[i].move(); //this will move each Ball object in the array
    bob[i].display(); //this will display each Ball object
  }

  // move and display all the Balls in the balls list
  for ( int i=0; i<bobslist.size(); i=i+1) {
    Ball temp = bobslist.get(i); //this gets the ith object in the array list
    temp.display();
    temp.move();
  }
}  
//this method runs every time the mouse is clicked
void mousePressed() {
  //loop to create 10 (numberOfBalls) Ball objects in the Ball array
  for ( int i=0; i<5; i=i+1) {
    // bob[i] = new Ball(mouseX, mouseY, width, height); //this creates Ball object in the array spaces from 0 to 1 to 2 to....numberOfBalls

    //add one ball object to the bobslist arraylist
    bobslist.add(new Ball (mouseX, mouseY)); //.add means run the add method for arraylists
  }
}
//this runs whenever any key is pressed
void keyPressed() {
  for( int i=0; i<5; i=i+1)
  if(bobslist.size()>0){
  bobslist.remove(0);
  }


}

And below is my class:

    //this class defines how balls look and move

public class Ball {
  //all the code in here defines the Ball objects

  //first, declare any class variables
  int rad;        // Width of the shape
  float xpos, ypos;    // Starting position of shape    

  float xspeed;  // Speed of the shape
  float yspeed;  // Speed of the shape

  int xdirection;  // Left or Right
  int ydirection;  // Top to Bottom

  float redcolor; // Declare 3 variables for ball color
  float greencolor;
  float bluecolor;

  //a constructor: code that runs when we make an object
  public Ball() {
    rad = (int)random(100); //This is to randomize the size of the balls without the balls flickering
    xspeed = random(10); //random speed for balls
    yspeed = random(10);
    xdirection = 1;
    ydirection = 1;
    xpos = random(rad, 400-rad);
    ypos = random(rad, 200-rad);
    redcolor = random(255); //pick random color value
    greencolor = random(255);
    bluecolor = random(255);
  }

  //an overload constructor with width and height
  public Ball(int w, int h) { //w=width, h=height
    rad = (int)random(100); //This is to randomize the size of the balls without the balls flickering
    xspeed = random(10); //random speed for balls
    yspeed = random(10);
    xdirection = 1;
    ydirection = 1;
    xpos = random(rad, w-rad);
    ypos = random(rad, h-rad);
    redcolor = random(255); //pick random color value
    greencolor = random(255);
    bluecolor = random(255);
  }

  //a overloaded constructor: takes 2 location values
  public Ball(int xposition, int yposition, int w, int h) { //parameters
    rad = (int)random(100); //This is to randomize the size of the balls without the balls flickering
    xspeed = random(10); //random speed for balls
    yspeed = random(10);

    float change = random(-100, 100);
    if (change < 0) {

      xdirection = -1;
    } else {
      xdirection = 1;
    }

    change = random(-100, 100);
    if (change < 0) {

      ydirection = -1;
    } else {
      ydirection = 1;
    }

    xpos = xposition; //object will start in the parameter location
    ypos = yposition;
    redcolor = random(255); //pick random color value
    greencolor = random(255);
    bluecolor = random(255);
  }

  //methods to control the Ball objects

  public void move() {
    // Update the position of the shape
    xpos = xpos + ( xspeed * xdirection );
    ypos = ypos + ( yspeed * ydirection );
    bounce();
  }

  public void bounce() {

    // Test to see if the shape exceeds the boundaries of the screen
    // If it does, reverse its direction by multiplying by -1
    if (xpos > width-rad || xpos < rad) {
      xdirection *= -1;
    }
    if (ypos > height-rad || ypos < rad) {
      ydirection *= -1;
    }
  }

  public void display() {
    // Draw the shape
    ellipse(xpos, ypos, rad, rad);
    fill(redcolor, greencolor, bluecolor);
  }
}

//METHOD

void changeShapes () {
    if (shape) {
     ellipse(xpos, ypos, rad, rad);
    fill(redcolor, greencolor, bluecolor);
  } else {
     rect(xpos, ypos, rad, rad);
    fill(redcolor, greencolor, bluecolor);
  }
}

Can you guys spot any errors in code?

kfrajer

https://forum.processing.org/two/discussion/comment/102633/#Comment_102633

Kf