You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
222 lines
5.6 KiB
222 lines
5.6 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - interactive lines</title>
|
|
<meta charset="utf-8">
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
|
<link type="text/css" rel="stylesheet" href="main.css">
|
|
<style>
|
|
body {
|
|
background-color: #f0f0f0;
|
|
color: #444;
|
|
}
|
|
a {
|
|
color: #08f;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<!-- Import maps polyfill -->
|
|
<!-- Remove this when import maps will be widely supported -->
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
|
|
|
<script type="importmap">
|
|
{
|
|
"imports": {
|
|
"three": "../build/three.module.js",
|
|
"three/addons/": "./jsm/"
|
|
}
|
|
}
|
|
</script>
|
|
|
|
<script type="module">
|
|
|
|
import * as THREE from 'three';
|
|
|
|
import Stats from 'three/addons/libs/stats.module.js';
|
|
|
|
let container, stats;
|
|
let camera, scene, raycaster, renderer, parentTransform, sphereInter;
|
|
|
|
const pointer = new THREE.Vector2();
|
|
const radius = 100;
|
|
let theta = 0;
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
container = document.createElement( 'div' );
|
|
document.body.appendChild( container );
|
|
|
|
const info = document.createElement( 'div' );
|
|
info.style.position = 'absolute';
|
|
info.style.top = '10px';
|
|
info.style.width = '100%';
|
|
info.style.textAlign = 'center';
|
|
info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - interactive lines';
|
|
container.appendChild( info );
|
|
|
|
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
|
|
|
|
scene = new THREE.Scene();
|
|
scene.background = new THREE.Color( 0xf0f0f0 );
|
|
|
|
const geometry = new THREE.SphereGeometry( 5 );
|
|
const material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
|
|
|
|
sphereInter = new THREE.Mesh( geometry, material );
|
|
sphereInter.visible = false;
|
|
scene.add( sphereInter );
|
|
|
|
const lineGeometry = new THREE.BufferGeometry();
|
|
const points = [];
|
|
|
|
const point = new THREE.Vector3();
|
|
const direction = new THREE.Vector3();
|
|
|
|
for ( let i = 0; i < 50; i ++ ) {
|
|
|
|
direction.x += Math.random() - 0.5;
|
|
direction.y += Math.random() - 0.5;
|
|
direction.z += Math.random() - 0.5;
|
|
direction.normalize().multiplyScalar( 10 );
|
|
|
|
point.add( direction );
|
|
points.push( point.x, point.y, point.z );
|
|
|
|
}
|
|
|
|
lineGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( points, 3 ) );
|
|
|
|
parentTransform = new THREE.Object3D();
|
|
parentTransform.position.x = Math.random() * 40 - 20;
|
|
parentTransform.position.y = Math.random() * 40 - 20;
|
|
parentTransform.position.z = Math.random() * 40 - 20;
|
|
|
|
parentTransform.rotation.x = Math.random() * 2 * Math.PI;
|
|
parentTransform.rotation.y = Math.random() * 2 * Math.PI;
|
|
parentTransform.rotation.z = Math.random() * 2 * Math.PI;
|
|
|
|
parentTransform.scale.x = Math.random() + 0.5;
|
|
parentTransform.scale.y = Math.random() + 0.5;
|
|
parentTransform.scale.z = Math.random() + 0.5;
|
|
|
|
for ( let i = 0; i < 50; i ++ ) {
|
|
|
|
let object;
|
|
|
|
const lineMaterial = new THREE.LineBasicMaterial( { color: Math.random() * 0xffffff } );
|
|
|
|
if ( Math.random() > 0.5 ) {
|
|
|
|
object = new THREE.Line( lineGeometry, lineMaterial );
|
|
|
|
} else {
|
|
|
|
object = new THREE.LineSegments( lineGeometry, lineMaterial );
|
|
|
|
}
|
|
|
|
object.position.x = Math.random() * 400 - 200;
|
|
object.position.y = Math.random() * 400 - 200;
|
|
object.position.z = Math.random() * 400 - 200;
|
|
|
|
object.rotation.x = Math.random() * 2 * Math.PI;
|
|
object.rotation.y = Math.random() * 2 * Math.PI;
|
|
object.rotation.z = Math.random() * 2 * Math.PI;
|
|
|
|
object.scale.x = Math.random() + 0.5;
|
|
object.scale.y = Math.random() + 0.5;
|
|
object.scale.z = Math.random() + 0.5;
|
|
|
|
parentTransform.add( object );
|
|
|
|
}
|
|
|
|
scene.add( parentTransform );
|
|
|
|
raycaster = new THREE.Raycaster();
|
|
raycaster.params.Line.threshold = 3;
|
|
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
container.appendChild( renderer.domElement );
|
|
|
|
stats = new Stats();
|
|
container.appendChild( stats.dom );
|
|
|
|
document.addEventListener( 'pointermove', onPointerMove );
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
function onPointerMove( event ) {
|
|
|
|
pointer.x = ( event.clientX / window.innerWidth ) * 2 - 1;
|
|
pointer.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
theta += 0.1;
|
|
|
|
camera.position.x = radius * Math.sin( THREE.MathUtils.degToRad( theta ) );
|
|
camera.position.y = radius * Math.sin( THREE.MathUtils.degToRad( theta ) );
|
|
camera.position.z = radius * Math.cos( THREE.MathUtils.degToRad( theta ) );
|
|
camera.lookAt( scene.position );
|
|
|
|
camera.updateMatrixWorld();
|
|
|
|
// find intersections
|
|
|
|
raycaster.setFromCamera( pointer, camera );
|
|
|
|
const intersects = raycaster.intersectObjects( parentTransform.children, true );
|
|
|
|
if ( intersects.length > 0 ) {
|
|
|
|
sphereInter.visible = true;
|
|
sphereInter.position.copy( intersects[ 0 ].point );
|
|
|
|
} else {
|
|
|
|
sphereInter.visible = false;
|
|
|
|
}
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|
|
|