polygon offset

pavement & marking

by jmcjc5u

HTML

<div id="info">polygon offset</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://raw.githack.com/mrdoob/three.js/master/examples/js/utils/SceneUtils.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, geometry, material, light, controls;

init();
animate();

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);

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

  document.body.appendChild(renderer.domElement);
  
	///////  CENTER: blue pushed back   /////////
  var mesh1 = new THREE.Mesh(new THREE.BoxGeometry(40, 50, 50),
    new THREE.MeshBasicMaterial({
      color: 0xff0000,
    }));
    
  var mesh0 = new THREE.Mesh(new THREE.BoxGeometry(50, 50, 50),
    new THREE.MeshBasicMaterial({
      color: 0x0000ff,
      polygonOffset: true,
      polygonOffsetFactor: 1.0,
      polygonOffsetUnits: 4.0
    }));
  scene.add(mesh1);
  scene.add(mesh0);

	////////// BLUE FILL+LINE //////////////
  var mesh2 = new THREE.Mesh(new THREE.BoxGeometry(50, 50, 50),
    new THREE.MeshBasicMaterial({
      color: 0x0000ff,
      polygonOffset: false,
      polygonOffsetFactor: 1.0,
      polygonOffsetUnits: 4.0
    }));
  mesh2.position.set(100, 0, 0);
  scene.add(mesh2);
  var mesh2Line = new THREE.Mesh(new THREE.BoxGeometry(50, 50, 50),
    new THREE.MeshBasicMaterial({
      color: 0xffffff,
      wireframe: true
    }));
  mesh2Line.position.set(100, 0, 0);
  scene.add(mesh2Line);

	///////////////////////////////////////////////////////////////
  // createMultiMaterialObject does not solve the z-fighting problem
  // This is mostly useful for object that need a material and a wireframe implementation.
  // (it simply superimposes them)
  //
  var mesh3geom = new THREE.BoxGeometry(50, 50, 50);
  var mat = new THREE.MeshBasicMaterial({
    color: 0x00ff00,
    polygonOffset: true,
    polygonOffsetFactor: 1.0,
    polygonOffsetUnits: 4.0
  });
  var mat2 = new...