svg_lines.html 2.7 KB

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  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <title>three.js svg - lines</title>
  5. <meta charset="utf-8">
  6. <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
  7. <link type="text/css" rel="stylesheet" href="main.css">
  8. <style>
  9. svg {
  10. display: block;
  11. }
  12. </style>
  13. </head>
  14. <body>
  15. <div id="info">
  16. <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> svg - lines
  17. </div>
  18. <script type="importmap">
  19. {
  20. "imports": {
  21. "three": "../build/three.module.js",
  22. "three/addons/": "./jsm/"
  23. }
  24. }
  25. </script>
  26. <script type="module">
  27. import * as THREE from 'three';
  28. import { SVGRenderer } from 'three/addons/renderers/SVGRenderer.js';
  29. THREE.ColorManagement.enabled = false;
  30. let camera, scene, renderer;
  31. init();
  32. animate();
  33. function init() {
  34. camera = new THREE.PerspectiveCamera( 33, window.innerWidth / window.innerHeight, 0.1, 100 );
  35. camera.position.z = 10;
  36. scene = new THREE.Scene();
  37. scene.background = new THREE.Color( 0, 0, 0 );
  38. renderer = new SVGRenderer();
  39. renderer.setSize( window.innerWidth, window.innerHeight );
  40. document.body.appendChild( renderer.domElement );
  41. //
  42. const vertices = [];
  43. const divisions = 50;
  44. for ( let i = 0; i <= divisions; i ++ ) {
  45. const v = ( i / divisions ) * ( Math.PI * 2 );
  46. const x = Math.sin( v );
  47. const z = Math.cos( v );
  48. vertices.push( x, 0, z );
  49. }
  50. const geometry = new THREE.BufferGeometry();
  51. geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
  52. //
  53. for ( let i = 1; i <= 3; i ++ ) {
  54. const material = new THREE.LineBasicMaterial( {
  55. color: Math.random() * 0xffffff,
  56. linewidth: 10
  57. } );
  58. const line = new THREE.Line( geometry, material );
  59. line.scale.setScalar( i / 3 );
  60. scene.add( line );
  61. }
  62. const material = new THREE.LineDashedMaterial( {
  63. color: 'blue',
  64. linewidth: 1,
  65. dashSize: 10,
  66. gapSize: 10
  67. } );
  68. const line = new THREE.Line( geometry, material );
  69. line.scale.setScalar( 2 );
  70. scene.add( line );
  71. //
  72. window.addEventListener( 'resize', onWindowResize );
  73. }
  74. function onWindowResize() {
  75. camera.aspect = window.innerWidth / window.innerHeight;
  76. camera.updateProjectionMatrix();
  77. renderer.setSize( window.innerWidth, window.innerHeight );
  78. }
  79. function animate() {
  80. let count = 0;
  81. const time = performance.now() / 1000;
  82. scene.traverse( function ( child ) {
  83. child.rotation.x = count + ( time / 3 );
  84. child.rotation.z = count + ( time / 4 );
  85. count ++;
  86. } );
  87. renderer.render( scene, camera );
  88. requestAnimationFrame( animate );
  89. }
  90. </script>
  91. </body>
  92. </html>