///Project 5
///By: Ana Collantes

String author="Ana Collantes";
int many=8;
Person[] human=new Person[many];
int x=700;
int y=600;
float sidewalk=461;
float l; ///where letters are going to be at
int last;

float birdX, birdY;
int wing1=7;
int wing2;
int flap=25;
float cloudX;
float cloudY=random(1, 35);

void setup() {
  size(x, y);
  reset();
}
void reset() {
  l=height/1.3;
  //--for ( int p=0; p<=7; p=p+1) {
  for ( int p=0; p<many; p=p+1) {
    human[p]= new Person(p*79);
  }
  last=  many-1;
}


void draw() {
  background(209, 243, 255);
  fill(230, 201, 255);
  rect(0, l, x, y);

  bird();
  clouds();
  for ( int c=0; c<=4; c=c+1) {
    text( c, 10, 10+c*12 );
  }     
  for ( int p=0; p<many; p=p+1) {
    human[p].drawhuman();
  }
}

void bird() {
  fill(92, 185, 174);
  ellipse(birdX, birdY, 30, 20); // body
  triangle(birdX-wing1, birdY, birdX+wing1, birdY, birdX+wing2, birdY+flap); //// wing
  ellipse(birdX+16, birdY, 10, 10); // head


  birdX +=  (human[last].personX - birdX) / 90;
  float top=  (sidewalk - human[last].big);
  birdY +=  (top -birdY) / 90;
  //--  text( birdX, 10,10 );
  //--  text( birdY, 10,20 );

  if (birdY>0) { 
    flap=-25;
  } 
  if (birdY<200) { 
    flap=25;
  }
}

void clouds() {
  fill(255, 255, 255, 191);
  ellipse(cloudX, cloudY, 50, 20);

  cloudX=cloudX+3;
}


void keyPressed() {
  if (key == 'r') reset();
  if (key == 't') tall();
  if (key == 'b') birdX=birdY=0;
}
void tall() {
  //// Move tallest to end.
  //// Find index "k" of tallest; change personX to PersonX of last.
  int k=0;
  for (int j=1; j<many; j++) {
    if(human[j].big > human[k].big) k=j;
  }
  swap( human, k, last );
  //// 
  //
  last=  k;
}
void swap( Person human[], int k, int last ) {
  float save;
  save=human[k].personX;
  human[k].personX=  human[last].personX;      // Move k-th to end.
  human[last].personX=  save;                   // Move last to old X of tallest.
}


//// OBJECTS ////
class Person {
  float personX;
  float big;
  float w;
  float r;
  float b;
  float g;
  // CONSTRUCTOR //
  Person(float h) {
    personX=h+random(20, 40);
    big=  random(50, 150);
    w=  random(20, 60);
    r=  random(0, 255);
    b=  random(0, 255);
    g=  random(0, 255);
  }
  void drawhuman() {
    fill(r, g, b);
    rect(personX, sidewalk, w, -big);
    ellipse(personX+w/2, sidewalk-big-15, 15, 25);
  }
}