Custom Geometry

point, line, triangle

by jmcjc5u

HTML

<div id="info">Custom Geometry</div>
<script src="https://threejs.org/build/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js">
</script>

CSS

#info {
  position: absolute;
  top: 3%;
  width: 100%;
  padding: 10px;
  text-align: center;
  color: #ffff00
}

body {
  overflow: hidden;
}

JavaScript

var camera, scene, renderer;

init();
animate();

function lineExample() {

  let points = [];
	points.push(new THREE.Vector3(-100, -100, 0), new THREE.Vector3(-100, 100, 0), new THREE.Vector3(50, 100, 0));
  var lineGeometry = new THREE.BufferGeometry().setFromPoints(points);
  //lineGeometry.computeLineDistances();
  var lineMaterial = new THREE.LineDashedMaterial({
    color: 0x00cc00,
    dashSize: 14,
    gapSize: 12
  });

  return new THREE.Line(lineGeometry, lineMaterial);
}

function init() {
  scene = new THREE.Scene();

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

  renderer = new THREE.WebGLRenderer();
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.setClearColor(0x888888);

  let controls = new THREE.OrbitControls(camera, renderer.domElement);
  document.body.appendChild(renderer.domElement);
  window.addEventListener('resize', onWindowResize, false);

  //////////////////////////////////////////////////////////////
  light = new THREE.PointLight(0xffffff);
  light.position.set(100, 300, 200);
  scene.add(light);

	var line = lineExample();
  
  // moved from geometry to THREE.Line
  line.computeLineDistances();
	scene.add (line);
}

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

function animate() {
  requestAnimationFrame(animate);
  render();
}

function render() {
  renderer.render(scene, camera);
}