// 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 car1;

let car2;

​

function setup() {

  let text = createP("Hit space bar to toggle debugging lines.<br>Click the mouse to generate a new path.");

​

  createCanvas(640, 240);

  newPath();

​

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

  car1 = new Vehicle(0, height / 2, 2, 0.04);

  car2 = new Vehicle(0, height / 2, 3, 0.1);

}

​

function draw() {

  background(255);

  // Display the path

  path.show();

  // The boids follow the path

  car1.follow(path);

  car2.follow(path);

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

  car1.run();

  car2.run();

​

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

  //car1.borders(path);

  //car2.borders(path);

​

}

​

function newPath() {

  // A path is a series of connected points

  // A more sophisticated path might be a curve

  path = new Path();

  path.addPoint(0, 50);

  path.addPoint(500, 50);

  path.addPoint(250, 200);

​

}

​

function keyPressed() {

  if (key == ' ') {

    debug = !debug;

  }

}

​

function mousePressed() {

  newPath();

}