DRAW 2.0

​

function setup() {

  createCanvas(windowWidth,windowHeight);

  distance = 10;

  spring = 0.5;

  friction = 0.5;

  size = 25;

  diff = size/8;

  x = y = ax = ay = a = r = f = 0;

}

​

function draw() {

  oldR = r;

  if(mouseIsPressed) {

    mX = mouseX;

    mY = mouseY;

    if(!f) {

      f = 1;

      x = mX;

      y = mY;

    }

    ax += ( mX - x ) * spring;

    ay += ( mY - y ) * spring;

    ax *= friction;

    ay *= friction;

    a += sqrt( ax*ax + ay*ay ) - a;

    a *= 0.6;

    r = size - a;

    for( i = 0; i < distance; ++i ) {

      oldX = x;

      oldY = y;

      x += ax / distance;

      y += ay / distance;

      oldR += ( r - oldR ) / distance;

      if(oldR < 1) oldR = 1;

      strokeWeight( oldR+diff );

      line( x, y, oldX, oldY );

      strokeWeight( oldR );

      line( x+diff*2, y+diff*2, oldX+diff*2, oldY+diff*2 );

      line( x-diff, y-diff, oldX-diff, oldY-diff );

    }

  } else if(f) {

    ax = ay = f = 0;

  }

}

/**/