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| <!-- chapter-09-01.html -->
<!DOCTYPE html>
<html>
<head>
<title>Selecting objects</title>
<script type="text/javascript" src="../libs/three.js"></script>
<script type="text/javascript" src="../libs/stats.js"></script>
<script type="text/javascript" src="../libs/dat.gui.js"></script>
<script type="text/javascript" src="../libs/Projector.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<div id="Stats-output">
</div>
<div id="WebGL-output">
</div>
<script type="text/javascript">
function init() {
var stats = initStats();
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
var renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0));
renderer.setSize(window.innerWidth, window.innerHeight);
var planeGeometry = new THREE.PlaneGeometry(60, 20, 1, 1);
var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff});
var plane = new THREE.Mesh(planeGeometry, planeMaterial);
plane.rotation.x = -0.5 * Math.PI;
plane.position.x = 15;
plane.position.y = 0;
plane.position.z = 0;
scene.add(plane);
var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
var cubeMaterial = new THREE.MeshLambertMaterial({color: 0xff0000});
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
cube.position.x = -9;
cube.position.y = 3;
cube.position.z = 0;
scene.add(cube);
var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
var sphereMaterial = new THREE.MeshLambertMaterial({color: 0x7777ff});
var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
sphere.position.x = 20;
sphere.position.y = 0;
sphere.position.z = 2;
scene.add(sphere);
var cylinderGeometry = new THREE.CylinderGeometry(2, 2, 20);
var cylinderMaterial = new THREE.MeshLambertMaterial({color: 0x77ff77});
var cylinder = new THREE.Mesh(cylinderGeometry, cylinderMaterial);
cylinder.position.set(0, 0, 1);
scene.add(cylinder);
camera.position.x = -30;
camera.position.y = 40;
camera.position.z = 30;
camera.lookAt(scene.position);
var ambientLight = new THREE.AmbientLight(0x0c0c0c);
scene.add(ambientLight);
var spotLight = new THREE.SpotLight(0xffffff);
spotLight.position.set(-40, 60, -10);
scene.add(spotLight);
document.getElementById("WebGL-output").appendChild(renderer.domElement);
var tube;
var controls = new function () {
this.showRay = false;
};
var gui = new dat.GUI();
gui.add(controls, 'showRay').onChange(function (e) {
if (tube) scene.remove(tube)
});
function render() {
stats.update();
renderer.render(scene, camera);
requestAnimationFrame(render);
}
render();
document.addEventListener('mousedown', onDocumentMouseDown, false);
document.addEventListener('mousemove', onDocumentMouseMove, false);
function onDocumentMouseDown(event) {
var vector = new THREE.Vector3(( event.clientX / window.innerWidth ) * 2 - 1, -( event.clientY / window.innerHeight ) * 2 + 1, 0.5);
vector = vector.unproject(camera);
var raycaster = new THREE.Raycaster(camera.position, vector.sub(camera.position).normalize());
var intersects = raycaster.intersectObjects([sphere, cylinder, cube]);
if (intersects.length > 0) {
console.log(intersects[0]);
intersects[0].object.material.transparent = true;
intersects[0].object.material.opacity = 0.5;
}
}
function onDocumentMouseMove(event) {
if (controls.showRay) {
var vector = new THREE.Vector3(( event.clientX / window.innerWidth ) * 2 - 1, -( event.clientY / window.innerHeight ) * 2 + 1, 0.5);
vector = vector.unproject(camera);
var raycaster = new THREE.Raycaster(camera.position, vector.sub(camera.position).normalize());
var intersects = raycaster.intersectObjects([sphere, cylinder, cube]);
if (intersects.length > 0) {
var points = [];
points.push(new THREE.Vector3(-30, 39.8, 30));
points.push(intersects[0].point);
var mat = new THREE.MeshBasicMaterial({color: 0xff0000, transparent: true, opacity: 0.6});
var tubeGeometry = new THREE.TubeGeometry(new THREE.SplineCurve3(points), 60, 0.001);
if (tube) scene.remove(tube);
tube = new THREE.Mesh(tubeGeometry, mat);
scene.add(tube);
}
}
}
function initStats() {
var stats = new Stats();
stats.setMode(0);
stats.domElement.style.position = 'absolute';
stats.domElement.style.left = '0px';
stats.domElement.style.top = '0px';
document.getElementById("Stats-output").appendChild(stats.domElement);
return stats;
}
}
window.onload = init;
</script>
</body>
</html>
|
