processing workshop @ IKA +++ CITIES AND MONSTERS +++

/**
* a_single_soul is a quick simulation of a single human running around
* @author: Processing Workshop @ IKA 09 ika/akbild.ac.at
* @version: 1.0
*/

MENSCH M;           // Define a variable M of the class MENSCH

void setup() {      // setup define the basic layout of your sketch
size(300,300);      // set Size of the Window to 300/300
frameRate(12);      // frameRate try's to call draw function 12 times / second
M = new MENSCH();   // initialize variable M with calling the MENSCH() constructor
}

void draw() {       // use this function to draw elements to the screen
background(255);    // set the background to white
M.Update();         // call the Update() Method of the Class MENSCH
M.Render();         // call the Render() Method of the Class MENSCH
}

/**
* MENSCH is a class for www.processing.org
* MENSCH will simulate a human running around
* @author: Processing Workshop @ IKA 09 ika/akbild.ac.at
* @version: 1.0
*/

class MENSCH {

  PVector PVPos, PVDir;                                                // PVPos = current Position, PVDir = current Motion
  float Size;                                                          // Size = personal Space of each Human
  final float MaxSpeed = 3.0;                                          // MaxSpeed = 3.0 m/s

  MENSCH() {
    this.Size = random(2,5);                                           // define a personal space between 2 and 5 Meters
    this.PVPos = new PVector( random(width),random(height) );          // position MENSCH somewhere into the Window
    this.PVDir = new PVector( random(-1,1),random(-1,1) );             // create a random Motion
  }

  /** call to move the Person
  */
  void Update() {
    this.PVPos.add(this.PVDir);                                        // adds the current Motion to the Position
    this.PVDir.add( new PVector( random(-.1,.1),random(-.1,.1) ) );    // changes the current Motion a little bit
    this.PVDir.limit(MaxSpeed);                                        // limits the speed of the current Motion
    if (this.PVPos.x > width) {                                        // if a MENSCH walks out of the screen at the bottom
      this.PVPos.x -= width;                                           // it comes back at the top
    }
    else if (this.PVPos.x < 0) {                                       // top ==> bottom
      this.PVPos.x += width;
    }
    if (this.PVPos.y > height) {                                       // right ==> left
      this.PVPos.y -= height;
    }
    else if (this.PVPos.y < 0) {                                       // left ==> right
      this.PVPos.y += height;
    }
  }

  /** call to display the human on the screen
  */
  void Render() {
    pushStyle();
    strokeWeight(2);
    ellipse(this.PVPos.x,this.PVPos.y,this.Size,this.Size);
    strokeWeight(0);
    stroke(247,5,167);
    line(this.PVPos.x,this.PVPos.y,this.PVPos.x+this.PVDir.x*20,this.PVPos.y+this.PVDir.y*20);
    popStyle();
  }
}

+++CITIES AND MONSTERS +++