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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - lines - fat</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">
- </head>
- <body>
- <div id="container"></div>
- <div id="info"><a href="https://threejs.org" target="_blank">three.js</a> - fat lines raycasting</div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/",
- "stats-gl": "https://cdn.jsdelivr.net/npm/stats-gl@2.2.8/dist/main.js"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import Stats from 'stats-gl';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { LineMaterial } from 'three/addons/lines/LineMaterial.js';
- import { LineSegments2 } from 'three/addons/lines/LineSegments2.js';
- import { LineSegmentsGeometry } from 'three/addons/lines/LineSegmentsGeometry.js';
- import { Line2 } from 'three/addons/lines/Line2.js';
- import { LineGeometry } from 'three/addons/lines/LineGeometry.js';
- let line, thresholdLine, segments, thresholdSegments;
- let renderer, scene, camera, controls;
- let sphereInter, sphereOnLine;
- let stats;
- let gui;
- let clock;
- const color = new THREE.Color();
- const pointer = new THREE.Vector2( Infinity, Infinity );
- const raycaster = new THREE.Raycaster();
- raycaster.params.Line2 = {};
- raycaster.params.Line2.threshold = 0;
- const matLine = new LineMaterial( {
- color: 0xffffff,
- linewidth: 1, // in world units with size attenuation, pixels otherwise
- worldUnits: true,
- vertexColors: true,
- alphaToCoverage: true,
- } );
- const matThresholdLine = new LineMaterial( {
- color: 0xffffff,
- linewidth: matLine.linewidth, // in world units with size attenuation, pixels otherwise
- worldUnits: true,
- // vertexColors: true,
- transparent: true,
- opacity: 0.2,
- depthTest: false,
- visible: false,
- } );
- const params = {
- 'line type': 0,
- 'world units': matLine.worldUnits,
- 'visualize threshold': matThresholdLine.visible,
- 'width': matLine.linewidth,
- 'alphaToCoverage': matLine.alphaToCoverage,
- 'threshold': raycaster.params.Line2.threshold,
- 'translation': raycaster.params.Line2.threshold,
- 'animate': true
- };
- init();
- function init() {
- clock = new THREE.Clock();
- renderer = new THREE.WebGLRenderer( { antialias: true, alpha: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setClearColor( 0x000000, 0.0 );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
- camera.position.set( - 40, 0, 60 );
- controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 10;
- controls.maxDistance = 500;
- const sphereGeometry = new THREE.SphereGeometry( 0.25, 8, 4 );
- const sphereInterMaterial = new THREE.MeshBasicMaterial( { color: 0xff0000, depthTest: false } );
- const sphereOnLineMaterial = new THREE.MeshBasicMaterial( { color: 0x00ff00, depthTest: false } );
- sphereInter = new THREE.Mesh( sphereGeometry, sphereInterMaterial );
- sphereOnLine = new THREE.Mesh( sphereGeometry, sphereOnLineMaterial );
- sphereInter.visible = false;
- sphereOnLine.visible = false;
- sphereInter.renderOrder = 10;
- sphereOnLine.renderOrder = 10;
- scene.add( sphereInter );
- scene.add( sphereOnLine );
- // Position and THREE.Color Data
- const positions = [];
- const colors = [];
- const points = [];
- for ( let i = - 50; i < 50; i ++ ) {
- const t = i / 3;
- points.push( new THREE.Vector3( t * Math.sin( 2 * t ), t, t * Math.cos( 2 * t ) ) );
- }
- const spline = new THREE.CatmullRomCurve3( points );
- const divisions = Math.round( 3 * points.length );
- const point = new THREE.Vector3();
- const color = new THREE.Color();
- for ( let i = 0, l = divisions; i < l; i ++ ) {
- const t = i / l;
- spline.getPoint( t, point );
- positions.push( point.x, point.y, point.z );
- color.setHSL( t, 1.0, 0.5, THREE.SRGBColorSpace );
- colors.push( color.r, color.g, color.b );
- }
- const lineGeometry = new LineGeometry();
- lineGeometry.setPositions( positions );
- lineGeometry.setColors( colors );
- const segmentsGeometry = new LineSegmentsGeometry();
- segmentsGeometry.setPositions( positions );
- segmentsGeometry.setColors( colors );
- segments = new LineSegments2( segmentsGeometry, matLine );
- segments.computeLineDistances();
- segments.scale.set( 1, 1, 1 );
- scene.add( segments );
- segments.visible = false;
- thresholdSegments = new LineSegments2( segmentsGeometry, matThresholdLine );
- thresholdSegments.computeLineDistances();
- thresholdSegments.scale.set( 1, 1, 1 );
- scene.add( thresholdSegments );
- thresholdSegments.visible = false;
- line = new Line2( lineGeometry, matLine );
- line.computeLineDistances();
- line.scale.set( 1, 1, 1 );
- scene.add( line );
- thresholdLine = new Line2( lineGeometry, matThresholdLine );
- thresholdLine.computeLineDistances();
- thresholdLine.scale.set( 1, 1, 1 );
- scene.add( thresholdLine );
- const geo = new THREE.BufferGeometry();
- geo.setAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
- geo.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
- //
- document.addEventListener( 'pointermove', onPointerMove );
- window.addEventListener( 'resize', onWindowResize );
- onWindowResize();
- stats = new Stats( { horizontal: false } );
- stats.init( renderer );
- document.body.appendChild( stats.dom );
-
- initGui();
- }
- 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() {
- const delta = clock.getDelta();
- const obj = line.visible ? line : segments;
- thresholdLine.position.copy( line.position );
- thresholdLine.quaternion.copy( line.quaternion );
- thresholdSegments.position.copy( segments.position );
- thresholdSegments.quaternion.copy( segments.quaternion );
- if ( params.animate ) {
- line.rotation.y += delta * 0.1;
- segments.rotation.y = line.rotation.y;
- }
- raycaster.setFromCamera( pointer, camera );
- const intersects = raycaster.intersectObject( obj );
- if ( intersects.length > 0 ) {
- sphereInter.visible = true;
- sphereOnLine.visible = true;
- sphereInter.position.copy( intersects[ 0 ].point );
- sphereOnLine.position.copy( intersects[ 0 ].pointOnLine );
- const index = intersects[ 0 ].faceIndex;
- const colors = obj.geometry.getAttribute( 'instanceColorStart' );
- color.fromBufferAttribute( colors, index );
- sphereInter.material.color.copy( color ).offsetHSL( 0.3, 0, 0 );
- sphereOnLine.material.color.copy( color ).offsetHSL( 0.7, 0, 0 );
- renderer.domElement.style.cursor = 'crosshair';
- } else {
- sphereInter.visible = false;
- sphereOnLine.visible = false;
- renderer.domElement.style.cursor = '';
- }
- renderer.render( scene, camera );
- stats.update();
- }
- //
- function switchLine( val ) {
- switch ( val ) {
- case 0:
- line.visible = true;
- thresholdLine.visible = true;
- segments.visible = false;
- thresholdSegments.visible = false;
- break;
- case 1:
- line.visible = false;
- thresholdLine.visible = false;
- segments.visible = true;
- thresholdSegments.visible = true;
- break;
- }
- }
- function initGui() {
- gui = new GUI();
- gui.add( params, 'line type', { 'LineGeometry': 0, 'LineSegmentsGeometry': 1 } ).onChange( function ( val ) {
- switchLine( val );
- } ).setValue( 1 );
- gui.add( params, 'world units' ).onChange( function ( val ) {
- matLine.worldUnits = val;
- matLine.needsUpdate = true;
- matThresholdLine.worldUnits = val;
- matThresholdLine.needsUpdate = true;
- } );
- gui.add( params, 'visualize threshold' ).onChange( function ( val ) {
- matThresholdLine.visible = val;
- } );
- gui.add( params, 'width', 1, 10 ).onChange( function ( val ) {
- matLine.linewidth = val;
- matThresholdLine.linewidth = matLine.linewidth + raycaster.params.Line2.threshold;
- } );
- gui.add( params, 'alphaToCoverage' ).onChange( function ( val ) {
- matLine.alphaToCoverage = val;
- } );
- gui.add( params, 'threshold', 0, 10 ).onChange( function ( val ) {
- raycaster.params.Line2.threshold = val;
- matThresholdLine.linewidth = matLine.linewidth + raycaster.params.Line2.threshold;
- } );
- gui.add( params, 'translation', 0, 10 ).onChange( function ( val ) {
- line.position.x = val;
- segments.position.x = val;
- } );
- gui.add( params, 'animate' );
- }
- </script>
- </body>
- </html>
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