Shrinking Away pendulum

//import processing.video.*;

//MovieMaker mm;

// Pendulum properties

int lengthOfPendulum = 170;

float swingAngle = 90.0;

float frequency = 10;

// The frame range of the animation

int frameRange = 360;

void setup()

{

  size(360, 360);

  background(0);

  smooth();

  frameRate(9);

  //mm = new MovieMaker(this, width, height, "BasicPendulum.mov",

  //        12, MovieMaker.ANIMATION, MovieMaker.HIGH);

}

float frame = 0.0;

float direction = 0.0;

float decay = 0.0;

float angle = 0.0;

void draw()

{

  // Motion blur using alpha-blending

  fill(0, 300);

  rect(0, 0, width, height);

  // Translate the pendulum to the center of screen

  translate(width/2, height/100);

  // Current frame of animation

  frame = frameCount-390%frameRange;

  // The direction [-1, 1] in which the pendulum should swing

  direction = sin(radians(frame*frequency));

  // Slow down the pendulum by adding a linear decay

  decay = direction*lerp(1, 0, frame/frameRange);

  // Calculate the instantaneous angle of the swing after considering decay

  angle = decay*swingAngle;

  // Rotate and draw the pendulum

  rotate(radians(angle)+HALF_PI);

  drawPendulum();

  //mm.addFrame();

}

void drawPendulum()

{

  // draw line

  stroke(fill(text("Shrinking Away")));

  strokeWeight(3);

  line(0, 0, lengthOfPendulum, 0);

  // draw circle

  fill(255);

  stroke(255);

  strokeWeight(2);

  ellipse(lengthOfPendulum, 0, 25, 25);

  text("Shrinking   Away", 60, -10, -10);

 ellipse(lengthOfPendulum, 0, 25, 25);

}

void keyPressed() {

  if (key == ' ') {

    // Finish the movie if space bar is pressed

    // mm.finish();

    // Quit running the sketch once the file is written

    exit();

  }

}