// Daniel Shiffman

// http://natureofcode.com

​

// Path Following

// Path is a just a straight line in this example

// Via Reynolds: // http://www.red3d.com/cwr/steer/PathFollow.html

​

// Using this variable to decide whether to draw all the stuff

let debug = true;

​

// A path object (series of connected points)

let path;

​

// Two vehicles

let vehicle1, vehicle2;

function setup() {

  let text = createP("Hit space bar to toggle debugging lines.");

​

  createCanvas(640, 240);

  path = new Path();

​

  // Each vehicle has different maxspeed and maxforce for demo purposes

  vehicle1 = new Vehicle(0, height / 2, 2, 0.02);

  vehicle2 = new Vehicle(0, height / 2, 3, 0.05);

}

​

function draw() {

  background(255);

  // Display the path

  path.show();

  // The boids follow the path

  vehicle1.follow(path);

  vehicle2.follow(path);

  // Call the generic run method (update, borders, display, etc.)

  vehicle1.run();

  vehicle2.run();

​

  // Check if it gets to the end of the path since it's not a loop

  vehicle1.borders(path);

  vehicle2.borders(path);

}

​

function keyPressed() {

  if (key == " ") {

    debug = !debug;

  }

}

​