import java.applet.*; 
import java.awt.*; 
import java.awt.image.*; 
import java.awt.event.*; 
import java.io.*; 
import java.net.*; 
import java.text.*; 
import java.util.*; 
import java.util.zip.*; 

public class ropeClone12 extends BApplet {

int total = 100;
float distance = 5;
float counter = 1;
float inc = .05f;
float[] dist = new float[total];


boolean clear = true;
boolean black = true;
void setup() {
  size(600,600);
  noBackground();
  noStroke();
  fill(120,0,0);
  rect(0,0,width,height);
  ellipseMode(CENTER_DIAMETER);
  for (int i=0; i<total; i++){
    xPos[i] = 0;
    yPos[i] = 0;
    dist[i] = random(5,10);
  }
}

// LOOP

float xPosDelta, yPosDelta;
float xPosDelta2, yPosDelta2;
float accel2 = .7f, convert2 = .5f;
void loop () {
  elasticity();

  if (clear){
    fill(120,0,0);
    noStroke();
    rect(0,0,width,height);
  }
  
  for (int i=1; i<total-2; i++){
    xPosDelta2 = xPosDelta2 * accel2 + (xPos[i] - xPos[i-1]) * convert2;
    yPosDelta2 = yPosDelta2 * accel2 + (yPos[i] - yPos[i-1]) * convert2;
    xPosDelta = xPosDelta + xPosDelta2/2;
    yPosDelta = yPosDelta + yPosDelta2/2;
    xPos[i] = xPosDelta;
    yPos[i] = yPosDelta;
  }
  pushArray();

  setPoints();
  
}

// ELASTICITY
float xp = -10, yp = 300;
float xp2 = 0, yp2 = 0;
float accel = .98f;
float convert = .1f;
void elasticity(){
  xp2 = xp2 * accel + (mouseX - xp) * convert;
  yp2 = yp2 * accel + (mouseY - yp) * convert;
  xp = xp + xp2;
  yp = yp + yp2;
}

// PUSHARRAY
void pushArray(){
  for (int i=total-2; i>1; i--){
    dist[i+1] = dist[i];
  }
  dist[2] = abs(sin(counter) * 10) + 2;
  counter = counter + inc;
}

// SETPOINTS
float[] xPos = new float[total];
float[] yPos = new float[total];
float[] zPos = new float[total];
float dx;
float dy;
float d;

float mainDistance;
void setPoints(){

  xPos[1] = xp;
  yPos[1] = yp;
  xPos[0] = mouseX;
  yPos[0] = mouseY;

  for (int i=2; i<total; i++){
    dx = xPos[i] - xPos[i-1];
    dy = yPos[i] - yPos[i-1];
    d = sqrt(sq(dx) + sq(dy));

    xPos[i] = xPos[i-1] + dx * (dist[i]) / d;
    yPos[i] = yPos[i-1] + dy * (dist[i]) / d;
    zPos[i] = (i) * -1;
  }
  drawLine();
}


// DRAWLINE
void drawLine(){
  beginShape(LINE_STRIP);
  for (int i=total-1; i>50; i--){
    fill(51,0,0);
    ellipse(xPos[i]-1, yPos[i]+1, dist[i], dist[i]);

    fill(255,0,0);
    ellipse(xPos[i]+1, yPos[i]-1, dist[i], dist[i]);
    
    fill(100,0,0);
    ellipse(xPos[i], yPos[i], dist[i], dist[i]);
    //line(xPos[i], yPos[i] - 2, xPos[i], yPos[i] + 2);
    //line(xPos[i] - 2, yPos[i], xPos[i] + 2, yPos[i]);
    curveVertex(xPos[i], yPos[i], zPos[i]);
  }
  endShape();
}

void keyReleased () {
  if (key == ' ' && clear) { 
    clear = false;
  } else if (key == ' ' && !clear) {
    clear = true;
  }
}

}