Modify a text file: $/trees30a.pde

$/trees30a.pde

//// Trees 30 (with arrays)
String title=  "Many Trees [in an array]";
String subtitle=  "Click any tree to make it jump!";
String news="...";
String author=  "Briley & BAM";

float horizon;
color SKY=  color( 150, 200, 250 );
color GRASS=  color( 160, 255, 160 );

int many=3, maxtrees=30;
Tree[] forest = new Tree[maxtrees];

Star sun = new Star();

void setup() {
  size( 800, 600 );
  horizon = height/3;
  reset();
}

void reset()
{
  // Fill the forest with many trees!
  for ( int i=0; i<many; ++i) {
    forest[i] = new Tree(i);
  }
  news=  "All " + many + " trees reset.";
}

void draw() {
  background(SKY);
  sun.show();
  sun.move();
  fill(GRASS);
  rect( 0, horizon, width, height-horizon );
  // Draw all of the trees.
  for ( int i=0; i<many; ++i) {
    forest[i].show();
  }
  messages();
}

void messages() {
  fill(0);
  textSize(24);
  text( title, width/3, 30 );
  text( many + " trees", width-100, 30 );
  textSize(12);
  text( "+/- to change.", width-100, 45 );
  text( subtitle, width/3, 45 );
  text( news, 10, 44 );
  text( author, 10, height-10 );
}

void keyPressed()
{
  news="";
  if (key == 'q') exit();
  if (key == 'r') reset();
  if (key == '+') { 
    if (many<maxtrees) ++many;
    reset();
    news=  many + " trees.  ('r' to reset.)";
  }
  if (key == '-') { 
    if (many>0) --many;
    reset();
    news=  many + " trees.  ('r' to reset.)";
  }
  if (key == '0') many=0;
}

void mousePressed() {
    for (int i=0; i<many; ++i) {
      if (forest[i].hit(mouseX, mouseY)) forest[i].jump();
  }
}

//// OBJECTS ////

class Tree 
{
  float x=100, y=100;    // Position of tree (leaves);
  float w=100, h=150;    // diameter, trunk-height
  color leaves= color( 150, 200, 150 ); 
  color bark= color( 120, 90, 90 ); 
  int number;

Tree( int m )
  {
    number=m;
    jump();
    w=random(50, 150);
    h=random(50, 250);
    leaves=color( random(100, 200), random( 150, 255), random(100, 200));
    bark=color( random(100, 200), random( 30, 130), random(30, 130));
  }

void show() {
    fill(bark);
    rect( x-15, y-15+w/2, 30, h );
    fill(leaves);
    ellipse(x, y, w, w);
    fill(0);
    textSize(20);
    text(number, x-10, y);
    textSize(12);
  }
  void jump()
  {
    x=  random(100, width-100);
    y=  random(horizon-120, height-200);
    news=  "Tree " + number + " jumped!";
    background(leaves);
  }

boolean hit( float x1, float y1)
  {
    println( dist(x1, y1, x, y) );
    if ( dist(x1, y1, x, y) < w/2 ) { 
      return true;
    }
    return false;
  }
}//// End of class Tree. ////

class Star {
  float x=0, y=horizon;
  void show() {
    fill(255,255,0);
    ellipse( x,y, 40,40 );
  }
  void move() {
    x += 2;
    y = horizon - horizon   *   sin( PI * x/width );
    if (x>width) x=0;
  }
}//// End of class Tree. ////