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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - lines - colors</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="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - color lines<br/>
- <a href="http://en.wikipedia.org/wiki/Hilbert_curve">Hilbert curve</a> thanks to <a href="https://openprocessing.org/user/5654">Thomas Diewald</a>
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import * as GeometryUtils from 'three/addons/utils/GeometryUtils.js';
- let mouseX = 0, mouseY = 0;
- let windowHalfX = window.innerWidth / 2;
- let windowHalfY = window.innerHeight / 2;
- let camera, scene, renderer;
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 33, window.innerWidth / window.innerHeight, 1, 10000 );
- camera.position.z = 1000;
- scene = new THREE.Scene();
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- //
- const hilbertPoints = GeometryUtils.hilbert3D( new THREE.Vector3( 0, 0, 0 ), 200.0, 1, 0, 1, 2, 3, 4, 5, 6, 7 );
- const geometry1 = new THREE.BufferGeometry();
- const geometry2 = new THREE.BufferGeometry();
- const geometry3 = new THREE.BufferGeometry();
- const subdivisions = 6;
- let vertices = [];
- let colors1 = [];
- let colors2 = [];
- let colors3 = [];
- const point = new THREE.Vector3();
- const color = new THREE.Color();
- const spline = new THREE.CatmullRomCurve3( hilbertPoints );
- for ( let i = 0; i < hilbertPoints.length * subdivisions; i ++ ) {
- const t = i / ( hilbertPoints.length * subdivisions );
- spline.getPoint( t, point );
- vertices.push( point.x, point.y, point.z );
- color.setHSL( 0.6, 1.0, Math.max( 0, - point.x / 200 ) + 0.5, THREE.SRGBColorSpace );
- colors1.push( color.r, color.g, color.b );
- color.setHSL( 0.9, 1.0, Math.max( 0, - point.y / 200 ) + 0.5, THREE.SRGBColorSpace );
- colors2.push( color.r, color.g, color.b );
- color.setHSL( i / ( hilbertPoints.length * subdivisions ), 1.0, 0.5, THREE.SRGBColorSpace );
- colors3.push( color.r, color.g, color.b );
- }
- geometry1.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
- geometry2.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
- geometry3.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
- geometry1.setAttribute( 'color', new THREE.Float32BufferAttribute( colors1, 3 ) );
- geometry2.setAttribute( 'color', new THREE.Float32BufferAttribute( colors2, 3 ) );
- geometry3.setAttribute( 'color', new THREE.Float32BufferAttribute( colors3, 3 ) );
- //
- const geometry4 = new THREE.BufferGeometry();
- const geometry5 = new THREE.BufferGeometry();
- const geometry6 = new THREE.BufferGeometry();
- vertices = [];
- colors1 = [];
- colors2 = [];
- colors3 = [];
- for ( let i = 0; i < hilbertPoints.length; i ++ ) {
- const point = hilbertPoints[ i ];
- vertices.push( point.x, point.y, point.z );
- color.setHSL( 0.6, 1.0, Math.max( 0, ( 200 - hilbertPoints[ i ].x ) / 400 ) * 0.5 + 0.5, THREE.SRGBColorSpace );
- colors1.push( color.r, color.g, color.b );
- color.setHSL( 0.3, 1.0, Math.max( 0, ( 200 + hilbertPoints[ i ].x ) / 400 ) * 0.5, THREE.SRGBColorSpace );
- colors2.push( color.r, color.g, color.b );
- color.setHSL( i / hilbertPoints.length, 1.0, 0.5, THREE.SRGBColorSpace );
- colors3.push( color.r, color.g, color.b );
- }
- geometry4.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
- geometry5.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
- geometry6.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
- geometry4.setAttribute( 'color', new THREE.Float32BufferAttribute( colors1, 3 ) );
- geometry5.setAttribute( 'color', new THREE.Float32BufferAttribute( colors2, 3 ) );
- geometry6.setAttribute( 'color', new THREE.Float32BufferAttribute( colors3, 3 ) );
- // Create lines and add to scene
- const material = new THREE.LineBasicMaterial( { color: 0xffffff, vertexColors: true } );
- let line, p;
- const scale = 0.3, d = 225;
- const parameters = [
- [ material, scale * 1.5, [ - d, - d / 2, 0 ], geometry1 ],
- [ material, scale * 1.5, [ 0, - d / 2, 0 ], geometry2 ],
- [ material, scale * 1.5, [ d, - d / 2, 0 ], geometry3 ],
- [ material, scale * 1.5, [ - d, d / 2, 0 ], geometry4 ],
- [ material, scale * 1.5, [ 0, d / 2, 0 ], geometry5 ],
- [ material, scale * 1.5, [ d, d / 2, 0 ], geometry6 ],
- ];
- for ( let i = 0; i < parameters.length; i ++ ) {
- p = parameters[ i ];
- line = new THREE.Line( p[ 3 ], p[ 0 ] );
- line.scale.x = line.scale.y = line.scale.z = p[ 1 ];
- line.position.x = p[ 2 ][ 0 ];
- line.position.y = p[ 2 ][ 1 ];
- line.position.z = p[ 2 ][ 2 ];
- scene.add( line );
- }
- //
- document.body.style.touchAction = 'none';
- document.body.addEventListener( 'pointermove', onPointerMove );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- windowHalfX = window.innerWidth / 2;
- windowHalfY = window.innerHeight / 2;
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- //
- function onPointerMove( event ) {
- if ( event.isPrimary === false ) return;
- mouseX = event.clientX - windowHalfX;
- mouseY = event.clientY - windowHalfY;
- }
- //
- function animate() {
- camera.position.x += ( mouseX - camera.position.x ) * 0.05;
- camera.position.y += ( - mouseY + 200 - camera.position.y ) * 0.05;
- camera.lookAt( scene.position );
- const time = Date.now() * 0.0005;
- for ( let i = 0; i < scene.children.length; i ++ ) {
- const object = scene.children[ i ];
- if ( object.isLine ) {
- object.rotation.y = time * ( i % 2 ? 1 : - 1 );
- }
- }
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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