hw1 prototype

Part 2'

by oKLo

HTML

<div id="info">steer</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.js"></script>
<script src="https://dl.dropboxusercontent.com/u/3587259/Code/Threejs/OrbitControls.js">


</script>
<script src="https://jyunming-chen.github.io/tutsplus/js/KeyboardState.js"></script>

CSS

#info {
  position: absolute;
  top: 0px;
  width: 100%;
  padding: 10px;
  text-align: center;
  color: #ffff00
}

body {
  overflow: hidden;
}

JavaScript

var camera, scene, renderer, controls;
var keyboard = new KeyboardState();
var cylinder;

//var pos, vel, force;
//var angle = 0;

var agent;

// steer related
//var target = new THREE.Vector3(0, 0, -100);
var maxSpeed = 40;
var maxForce = 40;

var targetMesh;


//var power;
var mass = 1;
var clock = new THREE.Clock();


var Agent = function(aPos) {
  this.pos = aPos.clone();
  this.vel = new THREE.Vector3();
  this.force = new THREE.Vector3();
  this.target = new THREE.Vector3(0,0,-100);
  this.angle = 0;

  this.update = function(dt) {
    this.vel.add(this.force.clone().multiplyScalar(dt));
    this.pos.add(this.vel.clone().multiplyScalar(dt));

    if (this.vel.length() > 0.001) {
      this.angle = Math.atan2(-this.vel.z, this.vel.x);
    }
  };

  this.computeForce = function() {
    var target = this.target;
    var pos = this.pos;
    var vel = this.vel;
    
    var ff = target.clone().sub(pos).setLength(maxSpeed).sub(vel);
    if (ff.length() > maxForce)
      ff.setLength(maxForce);
    this.force.copy(ff);
  }
};


init();
animate();

function init() {
  scene = new THREE.Scene();

  camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
  camera.position.z = 500;
  scene.add(camera);

  // add my cylinder
  var geometry = new THREE.BoxGeometry(15, 2, 5);
  var material = new THREE.MeshNormalMaterial();
  cylinder = new THREE.Mesh(geometry, material);
  scene.add (cylinder);
  
  var gridXZ = new THREE.GridHelper(100, 10);
  gridXZ.setColors(new THREE.Color(0xff0000), new THREE.Color(0xffffff));
  scene.add(gridXZ);

  targetMesh = new THREE.Mesh(new THREE.CylinderGeometry(3, 3, 2, 20), new THREE.MeshNormalMaterial());
  scene.add(targetMesh);

  renderer = new THREE.WebGLRenderer();
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.setClearColor(0x888888);

  controls = new THREE.OrbitControls(camera, renderer.domElement);

  //////////////////////
//  pos = new THREE.Vector3();
  //vel = new...