makeBasis

buttons

by jmchen

HTML

<div id="info">My Second Three.js
  <br/> turning, buttons, orbitControls, resize
  <br/>
  <br/>
  <button id="toggle" style="width:20%">Toggle Turn</button>
</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://code.jquery.com/jquery-2.1.4.min.js"></script>

CSS

#info {
  position: absolute;
  top: 2%;
  width: 100%;
  padding: 10px;
  text-align: center;
  color: #ffff00
}

body {
  overflow: hidden;
}

JavaScript

var scene, renderer, camera;
var controls;
var mesh, angle = 0,
  turn = false;

init();
animate();

$("#toggle").click(function() {
  turn = !turn;
});

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

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

  window.addEventListener('resize', onWindowResize, false);
	//////////////////////////////////////////////////////////////////////
	var geometry = new THREE.BoxGeometry(100, 20, 20);
  var material = new THREE.MeshBasicMaterial({
    wireframe: true
  });

  mesh = new THREE.Mesh(geometry, material);
  mesh.rotation.y = -Math.PI/3;
  mesh.updateMatrixWorld();
 
  var mm = new THREE.Matrix4();
  var xx = new THREE.Vector3(.866, .5, 0);
  var yy = new THREE.Vector3(-.5, .866,0);
  var zz = new THREE.Vector3(0,0,1);
  zz.applyAxisAngle (yy, 0.51);
  xx.applyAxisAngle (yy, 0.51);
  mm.makeBasis(xx,yy,zz);
  mm.setPosition (new THREE.Vector3(50,50,-50));
  mesh.matrix.copy (mm);
  mesh.matrixAutoUpdate = false;

	scene.add(mesh);;

}

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

function animate() {
  controls.update();
/*
	if (turn)
    angle += 0.01;
  mesh.rotation.y = angle;
*/
  requestAnimationFrame(animate);
  renderer.render(scene, camera);
}