//Original Concept and Code by Noah King
//for Expression Frameworks course
//ITP Fall 2010

PFont font1;
Countries [] country = new Countries[194];

void setup() {
  size(800,600);
  smooth();
  frameRate(30);
  colorMode(RGB, 100);
  font1 = loadFont("MyriadPro-SemiExt-12.vlw");
  textFont(font1,12);
  parseData();
}

void draw(){
  background(70);
  for(int i = 1; i < 194; i++){
    if(country[i].mPopulation > 0.0) {
      country[i].update();
      stroke(30,30,50,20);
      if(i > 2){
        line(country[i].mPos.x, country[i].mPos.y, country[i-1].mPos.x, country[i-1].mPos.y);
      } else {
        line(country[i].mPos.x, country[i].mPos.y, country[193].mPos.x, country[193].mPos.y);
      } 
      country[i].display();
    }
  }
}

void parseData() {
  String[] lines = loadStrings("world_population.csv");
  for(int i = 0; i < lines.length; i++) {
    if(i>0){
      String line = lines[i];
      String chunks[] = line.split(",");
      String name = chunks[0].trim();
      String population = chunks[1].trim();
      country[i] = new Countries(name, float(population));
    }
  }
}

class Countries{
  String mName;
  float mPopulation;
  float mOffset;
  
  PVector mPos = new PVector(0.0, 0.0);
  PVector mVel = new PVector(0.0, 0.0);
  PVector mAcl = new PVector(0.0, 0.0);
  float mAngle;
  
  Countries(String name, float population){
    mName = name;
    mPopulation = population;
    mPopulation /= 1300000;
    mPopulation *= width/2;
    mOffset = mPopulation/2;
    mPos.x = random(mOffset, width-mOffset);
    mPos.y = random(mOffset, height-mOffset);
    mVel.x = random(2.0)/ sqrt(mOffset/5);
    mVel.y = random(2.0)/ sqrt(mOffset/5);
    if(mVel.x > 2.0 ){ mVel.x = random(1.5, 2.5);}
    if(mVel.y > 2.0 ){ mVel.y = random(1.5, 2.5);}
    //mAcl.y = mOffset/500;
  }
  
  void update(){
    if(mPos.x > width - mOffset || mPos.x < 0 + mOffset){
      mVel.x *= -1;  
    }
    if(mPos.y > height - mOffset || mPos.y < 0 + mOffset){
      mVel.y *= -1;
      //mPos.y = height - mOffset;  
    }
    mVel.add(mAcl);
    mPos.add(mVel);
  }
  
  void display(){
    fill(100,15);
    stroke(100,50);
    ellipse(mPos.x, mPos.y, mPopulation, mPopulation);
    fill(100, 0, 0, mOffset*2 + 20);
    textAlign(CENTER);
    text(mName, mPos.x, mPos.y);
  }
}