hw5-1

d-drive

by jmchen

HTML

<div id="info">D-Drive<br>
	Home to start<br>
	Space to stop<br>
	Left/Right to turn <br>
	Up/Down to accelerate/decelerate
</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: 2%;
  width: 100%;
  padding: 10px;
  text-align: center;
  color: #ffff00
}

body {
  overflow: hidden;
}

JavaScript

var clock = new THREE.Clock();
var scene, renderer, camera;
var controls, keyboard = new KeyboardState();
var car;

// state variables of toycar
var pos = new THREE.Vector3(0,0,0);
var vel = new THREE.Vector3(0,0,0);
var angle = 0;
var force = new THREE.Vector3();
var power = 0;

window.onload = function() {
	init();
	animate();
}

function init()
{
	var width = window.innerWidth;
	var height = window.innerHeight;

	renderer = new THREE.WebGLRenderer({antialias: true});
	renderer.setSize (width, height);
	renderer.setClearColor (0x888888);
	document.body.appendChild (renderer.domElement);

	scene = new THREE.Scene();

	camera = new THREE.PerspectiveCamera (45, width/height, 1, 10000);
	camera.position.y = 160;
	camera.position.z = 400;
	camera.lookAt (new THREE.Vector3(0,0,0));
	scene.add (camera);

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

	var gridXZ = new THREE.GridHelper(100, 10);
	gridXZ.setColors( new THREE.Color(0xff0000), new THREE.Color(0xffffff) );
	scene.add(gridXZ);

	var pointLight = new THREE.PointLight (0xffffff);
	pointLight.position.set (0,300,200);
	scene.add (pointLight);

	var ambientLight = new THREE.AmbientLight (0x111111);
	scene.add(ambientLight);

	car = new THREE.Mesh (new THREE.SphereGeometry (5,12,12), new THREE.MeshBasicMaterial());
  scene.add (car);
}


function animate()
{
	var dt = clock.getDelta();

	// euler's method
	vel.add ( force.clone().multiplyScalar(dt) );
	pos.add ( vel.clone().multiplyScalar(dt) );

	if (vel.length() > 0) {
		angle = Math.atan2 (-vel.z, vel.x);  // update orientation
	}
	car.position.copy (pos);
  
	requestAnimationFrame ( animate );  
	update();
	render();  
}

window.onresize = function () {
	camera.aspect = window.innerWidth / window.innerHeight;
	camera.updateProjectionMatrix();
	renderer.setSize (window.innerWidth, window.innerHeight);
}

function myclamp(x,lo,hi)
{
	if (x < lo) return lo;
	if (x > hi) return hi;
	return x;
}

function...