Teaching

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====== Assignment 7 ======

Create a project in your open processing with this code. Make sure you put your name at the top with the date and project description.

  - Comment every line of the code to explain what it does
  - Change the square to a ball
  - When the user clicks the screen, reset the position of the ball to where the mouse is

<code java>

// Credit: Ren Ervin Bettendorf 

/* SCREENSAVERS FER DAYS BROSKIES */
void setup(){
  size(600,500);  
  background(0);
  frameRate(60);
}

int dx = 2;
int dy = 3;

int x = 50;
int y = 50;

void draw(){
    fill(255);
    rect(x,y,25,25,5);
  
    x = x + dx;
    y = y + dy;
    
    if ( x< 0 || x > 475){
       dx = -1 * dx;
    }
    
    if ( y < 0 || y > 475){
       dy = -1 * dy;  
    }

}

</code>

If you get done early, check out this code from http://processing.org/tutorials/objects/:

<code java>
// http://processing.org/tutorials/objects/

// Example: Two Car objects
Car myCar1;
Car myCar2; // Two objects!

void setup() {
  size(200,200);
  // Parameters go inside the parentheses when the object is constructed.
  myCar1 = new Car(color(255,0,0),0,100,2); 
  myCar2 = new Car(color(0,0,255),0,10,1);
}

void draw() {
  background(255);
  myCar1.drive();
  myCar1.display();
  myCar2.drive();
  myCar2.display();
}

// Even though there are multiple objects, we still only need one class. 
// No matter how many cookies we make, only one cookie cutter is needed.
class Car { 
  color c;
  float xpos;
  float ypos;
  float xspeed;

  // The Constructor is defined with arguments.
  Car(color tempC, float tempXpos, float tempYpos, float tempXspeed) { 
    c = tempC;
    xpos = tempXpos;
    ypos = tempYpos;
    xspeed = tempXspeed;
  }

  void display() {
    stroke(0);
    fill(c);
    rectMode(CENTER);
    rect(xpos,ypos,20,10);
  }

  void drive() {
    xpos = xpos + xspeed;
    if (xpos > width) {
      xpos = 0;
    }
  }
}

</code>

Once you are done that, check this out: http://www.openprocessing.org/sketch/103348
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