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              <div id="viewport"></div>
<a class="js-btn-open-map">open / close map</a>
            
          
!
            
              html, body{
   padding:0;
	margin:0;
	width:100%;
	height:100%;
	font-family: 'Open Sans', sans-serif;
	overflow:hidden;
	background-color:#ccc;
	font-size:16px;
	position:relative;
}

canvas{
	cursor:grab;
	cursor:-webkit-grab; 
	cursor:-moz-grab;
}

canvas:active{
	cursor:grabbing;
	cursor:-webkit-grabbing; 
	cursor:-moz-grabbing;
}

.js-btn-open-map{
	color:#ccc;
   background:rgba(85,85,85, 0.75);
	cursor:pointer;
	position:absolute;
   bottom:0;
	left:50%;
	transform:translateX(-50%);
	font-weight:600;
	transition:0.25s all;
   
   padding:20px;
   display:inline-block;
   
  -webkit-user-select: none; 
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;  
  
}

.js-btn-open-map:hover{
   background:rgba(85,85,85, 0.9);
	color:#fff;
}
            
          
!
            
              var scene = new THREE.Scene();
var viewport, renderer, camera, controls, light;

// plane variables
var geometryDetailLevel = 4; 
var mapURL = 'https://maps.googleapis.com/maps/api/staticmap?size=512x512&zoom=12&center=53.523219,-113.526319&format=png&key=AIzaSyCd5ZoMYrDuVeDkXnpztEodrQ-IyXInnek';
var plane, geometry, standingX, standingZ;

// animation variables
var start, startAngle;
var animDuration = 500;
var targetAngle = 5;

window.requestAnimFrame = function(){
return (
  window.requestAnimationFrame       || 
  window.webkitRequestAnimationFrame || 
  window.mozRequestAnimationFrame    || 
  window.oRequestAnimationFrame      || 
  window.msRequestAnimationFrame     || 
  function(/* function */ callback){
    window.setTimeout(callback, 1000 / 60);
  }
);
}();

function rand(min, max) {
  return Math.random() * (max - min) + min;
}


function init() {
  scene = new THREE.Scene();
  scene.background = new THREE.Color( 0x555555 );

  var WIDTH = window.innerWidth,
      HEIGHT = window.innerHeight;
  viewport = document.getElementById('viewport');

  renderer = new THREE.WebGLRenderer();
  renderer = new THREE.WebGLRenderer({ antialias: true });
  renderer.setSize(WIDTH, HEIGHT);
  renderer.shadowMap.enabled = true;
  renderer.shadowMapSoft = true;

  renderer.shadowMapBias = 0.0039;
  renderer.shadowMapDarkness = 0.5;
  renderer.shadowMapWidth = 1024;
  renderer.shadowMapHeight = 1024;

  viewport.appendChild(renderer.domElement);
  window.addEventListener( 'resize', onWindowResize, false );


  /* ************** */
  /*                */
  /*     camera     */
  /*                */
  /* ************** */
  camera = new THREE.PerspectiveCamera(10, WIDTH / HEIGHT, 0.1, 200000);
  camera.position.set(-5, 25, 25 );
  scene.add(camera);

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

  createMapTexture();

  /* ************* */
  /*               */
  /*     light     */
  /*               */
  /* ************* */
  var light = new THREE.PointLight( 0xffffff, 1.5, 70 );
  light.position.set( -geometryDetailLevel , geometryDetailLevel, geometryDetailLevel); 
  light.castShadow = true; 
  light.shadow.camera.updateProjectionMatrix();
  scene.add( light );

  var sideLight = light.clone();
  sideLight.position.set( geometryDetailLevel , 0, 0);
  sideLight.intensity = 0.6;
  scene.add( sideLight );

  var bottomLight = light.clone();
  bottomLight.position.set( geometryDetailLevel , -geometryDetailLevel, -geometryDetailLevel);
  bottomLight.intensity = 0.4;
  scene.add( bottomLight );

  animate();
}

function rotate(centerX, centerY, angleInDegrees){
  var angleInRadians = angleInDegrees * (Math.PI / 180.0);
  var centerXOffset = 0;
  var centerYOffset = 0;
   
  return [
    Math.round((centerXOffset + ( Math.cos(angleInRadians))) * 1000) / 1000,
    Math.round((centerYOffset + ( Math.sin(angleInRadians))) * 1000) / 1000
  ];
}


function createMap(materials){
  geometry = new THREE.PlaneGeometry(geometryDetailLevel, geometryDetailLevel, 4, 0 ); // width, height, width segments, height segments  
  for (var i = 0, len = geometry.faces.length; i < len; i++) {
    var face = geometry.faces[i].clone();
    face.materialIndex = 1;
    geometry.faces.push(face);
    geometry.faceVertexUvs[0].push(geometry.faceVertexUvs[0][i].slice(0));
  }

  plane = new THREE.Mesh( geometry, new THREE.MultiMaterial(materials) );
  plane.recieveShadow = true;
  plane.castShadow = true; 
  geometry.recieveShadow = true;
  geometry.castShadow = true; 
  geometry.computeVertexNormals();

  scene.add( plane );
  plane.rotateX(-90 * Math.PI / 180);

  startAngle = 89;

  point = rotate(0, 0, startAngle);
  standingX = point[0];
  standingZ = point[1];

  for(var i=0; i<plane.geometry.vertices.length; i++){
    vertex = plane.geometry.vertices[i];
    vertex.origX = vertex.x;
    vertex.origY = vertex.y;

    vertex.x = vertex.origX * standingX;
    if(vertex.origX == 1 || vertex.origX == -1){
      vertex.z = standingZ;  
    }
  }

  geometry.verticesNeedUpdate = true;

  window.setTimeout(function(){
    start = null;
    window.requestAnimFrame(step);
  }, 500);
}


function step(timestamp) {
  if (!start) start = timestamp;
  timestampDifference = timestamp - start;
  if(timestampDifference< animDuration){
    timestampRatio = timestampDifference / animDuration;
  }else{
    timestampRatio = 1;
  }

  angle = startAngle - timestampRatio * (startAngle - targetAngle);
  point = rotate(0, 0, angle);

  standingX = point[0];
  standingZ = point[1];

  for(var i=0; i<plane.geometry.vertices.length; i++){
    vertex = plane.geometry.vertices[i];
    vertex.x = vertex.origX * standingX;
    if(vertex.origX == 1 || vertex.origX == -1){
      vertex.z = standingZ;  
    }
  }
  geometry.verticesNeedUpdate = true;

  if(timestampDifference < animDuration){
    timestampRatio = timestampDifference / animDuration;
    window.requestAnimationFrame(step);
  }else{
    startAngle = [targetAngle, targetAngle = startAngle][0];
  }

}

function createMapTexture(){
  var loader = new THREE.TextureLoader();
  loader.crossOrigin = 'anonymous';
    loader.load(
      mapURL,
      function ( texture ) {
        var frontMaterial = new THREE.MeshPhongMaterial({
          color: 0xffffff,
          shading : THREE.FlatShading,
          side: THREE.FrontSide,
        });
        frontMaterial.map = texture;

        var backMaterial = frontMaterial.clone();
        backMaterial.side = THREE.BackSide;

        var materials = [backMaterial, frontMaterial];
        createMap(materials);
      },
      function ( xhr ) { // Function called when download progresses
        console.log( (xhr.loaded / xhr.total * 100) + '% loaded' );
      },
      // Function called when download errors
      function ( xhr ) {
        console.log( 'An error happened' );
      }
    );
}

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

function animate() {
  requestAnimationFrame(animate);
  renderer.render(scene, camera);
  controls.update();
}

btn_js_open_map = document.querySelector(".js-btn-open-map");
btn_js_open_map.addEventListener("click", function(e){
  start = null;
  window.requestAnimFrame(step);
});

init();


            
          
!
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