clipping

buttons

by jmchen

HTML

<div id="info">Clipping Helper
  <br>
  <br>
  <button id="toggle" style="width:20%">Toggle Turn</button>
</div>
<script src="https://threejs.org/build/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/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 mesh, mesh1, angle = 0,
  turn = false;
var group;

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

  var geometry = new THREE.BoxGeometry(20, 100, 20);
  var localPlane = new THREE.Plane( new THREE.Vector3( 0,  1, 0 ), -20 );
  var material = new THREE.MeshNormalMaterial({
  	//side: THREE.DoubleSide,
		clippingPlanes: [ localPlane ]
	});

  mesh0 = new THREE.Mesh(geometry, material);
  //scene.add(mesh0);

  var localPlane = new THREE.Plane( new THREE.Vector3( 0,  -1, 0 ), 20 );
  var material = new THREE.MeshNormalMaterial({
  	//side: THREE.DoubleSide,
		clippingPlanes: [ localPlane ]
	});

  mesh1 = new THREE.Mesh(geometry, material);
  //scene.add(mesh1);

	var gridXZ = new THREE.GridHelper(200, 20, 'red', 'white');
  scene.add(gridXZ);

  window.addEventListener('resize', onWindowResize, false);
  group = new THREE.Object3D();
  scene.add (group)
  group.add (mesh0, mesh1);
  group.position.y = 20;
}

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

function animate() {
  if (turn)
    angle += 0.01;
  mesh0.rotation.y = angle;

	renderer.localClippingEnabled = true;
  
  requestAnimationFrame(animate);
  renderer.render(scene, camera);
}