/*abstraction flap
  
  created with processing 0135
  by rce12
  
  - click anywhere to paint
  - press spacebar to clear screen and painter
  
  my first work with ArrayList. I was use that to flexible 
  interaction [clicking anywhere, funky motion, etc.] and i was
  creating a unique-aquarel-monochrome painter where you cilickin
  at location.
*/

ArrayList flap;

void setup(){
  size(500,500);
  background(255);
  flap=new ArrayList();
  smooth();
}

void draw(){
  for(int a=0;a<flap.size();a++){
   flapper fp=(flapper)flap.get(a);
   fp.interact();
   fp.trail();
  }
}

void mousePressed(){
  //launch that
  flapper launch=new flapper();
  launch.x=mouseX;
  launch.y=mouseY;
  flap.add(launch);
}

void keyPressed(){
  //reset
  if(key==' '){
    background(255);
    flap.clear();
  }
}

  class flapper{
  float x,y,x2,y2,x3,y3;
  float theta,theta_tic;
  float spd,spd_fd;
  int gval=(int)random(255);
  int style=(int)random(3);
  
  flapper(){
    //construct this
    x=width/2;
    y=height/2;
    theta=random(-TWO_PI,TWO_PI)+random(-0.5,0.5);
    spd=random(0.5,5);
    spd_fd=random(0.9,1.1);
    theta_tic=random(-0.01,0.01);
  }
  
  void interact(){
    //create moves
    x+=spd*cos(theta);
    y+=spd*sin(theta);
    
    //move on
    theta+=theta_tic;
    spd*=spd_fd;
    
    //tickle
    if(random(100)>99){
      spd=-spd;
    }
    
    //collide
    if((x<-width)||(x>width*2)||(y<-height)||(y>height*2)){
      return;
    }
  }
  
  void trail(){
    //assign previous move for create trail
    x3=x2;y3=y2;
    x2=x;y2=y;
    
    //draw
    stroke(gval,42);
    line(x,y,x3,y3);
    
    //another flow in any direction
    if(style==0){
      line(width-x,y,width-x3,y3);
    }else if(style==1){
      line(x,height-y,x3,height-y3);
    }else if(style==2){
      line(width-x,height-y,width-x3,height-y3);
    }
  }
}