// The Nature of Code

// The Coding Train / Daniel Shiffman

// https://youtu.be/Q4MU7pkDYmQ

// https://thecodingtrain.com/learning/nature-of-code/5.3-flee-pursue-evade.html

​

// Flee: https://editor.p5js.org/codingtrain/sketches/v-VoQtETO

// Pursue: https://editor.p5js.org/codingtrain/sketches/Lx3PJMq4m

// Evade: https://editor.p5js.org/codingtrain/sketches/X3ph02Byx

// Pursue Bouncing Ball: https://editor.p5js.org/codingtrain/sketches/itlyDq3ZB

// Pursue Wander: https://editor.p5js.org/codingtrain/sketches/EEnmY04lt

// Pursue Slider Prediction: https://editor.p5js.org/codingtrain/sketches/l7MgPpTUB

​

let cat, mouse;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  cat = new Vehicle(100, 100)

  cat.color = "red"

  cat.r = 20

  cat.maxForce = 0.2

  cat.maxSpeed = 6

​

  mouse = new Vehicle(400, 400)

  mouse.color = "yellow"

  mouse.r = 10

  mouse.maxForce = 0.1

  mouse.maxSpeed = 6

}

​

function draw() {

  background(0);

​

  if(frameCount % 300 < 200) {

    // Cat hungry! Cat pursues mouse

    cat.applyForce( cat.pursue(mouse) )

    // Mouse evades cat

    mouse.applyForce( mouse.evade(cat) )

  }

  else {

    // Cat tired! Cat and mouse slow down

    cat.applyForce( cat.vel.copy().mult(-0.01) )

    mouse.applyForce( mouse.vel.copy().mult(-0.01) )

  }

​

  cat.update()

  cat.edges()

  cat.show(true)

  mouse.edges()

  mouse.show(true)

  mouse.update()

}

​