minimap picking

scissorTest is important!

by j91157j91157

HTML

<div id="info">Mini Map
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/84/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js">


</script>
<script src="https://jyunming-chen.github.io/tutsplus/js/KeyboardState.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, controls;
var cameraHUD, sceneHUD;
var mouse = new THREE.Vector2();
var raycaster;
var x0,y0,vw,vh;
var cameraMap;

init();
animate();

function initHUD() {
  // sceneHUD: a simple line boundary
  sceneHUD = new THREE.Scene();
  cameraHUD = new THREE.OrthographicCamera(-10.5, 10.5, 10.5, -10.5, -10, 10);
  cameraHUD.position.z = 5;

  var lineGeometry = new THREE.Geometry();
  lineGeometry.vertices.push(new THREE.Vector3(-10, -10, 0),
    new THREE.Vector3(10, -10, 0),
    new THREE.Vector3(10, 10, 0),
    new THREE.Vector3(-10, 10, 0),
    new THREE.Vector3(-10, -10, 0));
  var line = new THREE.Line(lineGeometry,
    new THREE.LineBasicMaterial({
      color: 0xffffff
    }));
  sceneHUD.add(line);
  
  }

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

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

  var gridXZ = new THREE.GridHelper(240, 24, 'red', 'white');
  scene.add(gridXZ);

  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);

  /////////////////////////////////////////////////////////////////////
  plane = new THREE.Mesh(new THREE.PlaneGeometry(200, 200), new THREE.MeshBasicMaterial({
    transparent: true,
    opacity: 0.5,
    visible: true
  }));
  scene.add(plane);
  plane.rotation.x = -Math.PI / 2;
  pickables = [plane];

  puck = new THREE.Mesh(new THREE.CylinderGeometry(10, 10, 2, 20), new THREE.MeshNormalMaterial());
  scene.add(puck);

  raycaster = new THREE.Raycaster();
 document.addEventListener('mousedown', onDocumentMouseDown, false);
 	initHUD();

 renderer.autoClear = false;
 
   cameraMap = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 10000);
  //take a while to find a good view
  cameraMap.position.set (15,...