hw4 prototype

seek

by j91157j91157

HTML

<div id="info">hw4 helper</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r78/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.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 puck;
var agents = [];

var pickables = [];
var pickplane;
var raycaster = new THREE.Raycaster();
var mouse = new THREE.Vector2();

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

//var target = new THREE.Vector3();

var Agent = function(mesh, initPos) {
  this.pos = new THREE.Vector3();
  if (initPos) 
  	this.pos.copy(initPos);
  else 
  	this.pos.set (200*Math.random(), 0, 200*Math.random());

  this.vel = new THREE.Vector3();
  this.force = new THREE.Vector3();
  this.target = new THREE.Vector3();
  this.angle = 0;
  this.mesh = mesh.clone();  scene.add (this.mesh);
  this.maxSpeed = 60;
  this.maxForce = 60;

  this.setTarget = function(target) {
    this.target.copy(target);
  }

  this.update = function(dt) {
    // compute force
    if (this.target) {
    	this.force = this.target.clone().sub(this.pos).setLength(this.maxSpeed).sub(this.vel);
}
		// group steering
    groupSteer (this);
    
    // force clamping
    if (this.force.length() > this.maxForce)
      this.force.setLength(this.maxForce);
    this.vel.add(this.force.clone().multiplyScalar(dt));

    // velocity clamping
    if (this.vel.length() > this.maxSpeed)
      this.vel.setLength(this.maxSpeed);
    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.mesh.position.copy(this.pos);
    this.mesh.rotation.y = this.angle;

    // catch handling
	
	if (this.target && this.pos.distanceTo(this.target) < 2) {
      this.vel.set(0, 0, 0);
    }

  }
}

function groupSteer (myself) {
	// find agents in my neighborhood
  var nbhd = [];
  var R = 10;
  for (var i = 0; i < agents.length; i++) {
  	if (agents[i] === myself) {
      continue;
    }
    if (myself.pos.distanceToSquared (agents[i].pos) < R*R) {
    	nbhd.push (agents[i]);
    }
  }
  
 	// find separation force ... the most important one !
  for (var i = 0; i < nbhd.length; i++) {
    var r =...