2D template

with orbitControls, XZgrid, info

by Rebecca Chen

HTML

<div id="info">THREE.JS 2D Template
  <br/>Right click to move RED dot
</div>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.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;
var mouse = new THREE.Vector2();
var pos, vel, force;
var m = 1;
var clock = new THREE.Clock();
var ballFrame;

init();
animate();

function init() {
    renderer = new THREE.WebGLRenderer({
      antialias: true
    });
	
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.setClearColor(0x888888);
  document.body.appendChild(renderer.domElement);

  scene = new THREE.Scene();
  camera = new THREE.OrthographicCamera(-50, 50, 50, -50, -10, 100);
  camera.position.z = 10;
  scene.add(camera);

  ////////////////////////////////////////////////////////////////////////////////////////////
	var floor = new THREE.Mesh (new THREE.PlaneGeometry(100,50));
  floor.position.set (0,-25,0);
  scene.add (floor);
  
  var ball = new THREE.Mesh (new THREE.CircleGeometry(10,20));
  ballFrame = new THREE.Object3D();
  scene.add (ballFrame);
  ballFrame.add (ball);
  ball.position.y = 10;
  /*
  ballFrame.scale.set (1, 0.5, 1);  // squat
  ballFrame.scale.set (.5, 1.2, 1); // stretch
	*/

	pos = new THREE.Vector3(0,15,0);
	vel = new THREE.Vector3();
	force = new THREE.Vector3();
  
  window.addEventListener('resize', onWindowResize, false);
  window.addEventListener('mousedown', onDocumentMouseDown, false);
}

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

function onDocumentMouseDown(event) {
  event.preventDefault();
  // NDC: [-1,1]x[-1,1]
  mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
  mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;

  console.log(mouse.x + ', ' + mouse.y);

  if (event.button === 0) { // left button
    mousePoint.position.set(mouse.x * 50, mouse.y * 50, 0);
  }
}

function animate() {
	var dt = clock.getDelta();
  force.set (0, -10, 0);
  
	vel.add (force.clone().multiplyScalar(1./m*dt));
	pos.add (vel.clone().multiplyScalar(dt));
  
  ballFrame.position.copy...