multiple-scenes-v1.html 4.4 KB

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  1. <!-- Licensed under a BSD license. See license.html for license -->
  2. <!DOCTYPE html>
  3. <html>
  4. <head>
  5. <meta charset="utf-8">
  6. <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
  7. <title>Three.js - Multiple Scenes - v1</title>
  8. <style>
  9. #c {
  10. position: fixed;
  11. left: 0;
  12. top: 0;
  13. width: 100%;
  14. height: 100%;
  15. display: block;
  16. z-index: -1;
  17. }
  18. .diagram {
  19. display: inline-block;
  20. width: 5em;
  21. height: 3em;
  22. }
  23. .left {
  24. float: left;
  25. margin-right: .25em;
  26. }
  27. .right {
  28. float: right;
  29. margin-left: .25em;
  30. }
  31. p {
  32. margin: 1em auto;
  33. max-width: 500px;
  34. font-size: xx-large;
  35. }
  36. </style>
  37. </head>
  38. <body>
  39. <canvas id="c"></canvas>
  40. <p>
  41. <span id="box" class="diagram left"></span>
  42. I love boxes. Presents come in boxes.
  43. When I find a new box I'm always excited to find out what's inside.
  44. </p>
  45. <p>
  46. <span id="pyramid" class="diagram right"></span>
  47. When I was a kid I dreamed of going on an expedition inside a pyramid
  48. and finding a undiscovered tomb full of mummies and treasure.
  49. </p>
  50. </body>
  51. <script type="importmap">
  52. {
  53. "imports": {
  54. "three": "../../build/three.module.js"
  55. }
  56. }
  57. </script>
  58. <script type="module">
  59. import * as THREE from 'three';
  60. function main() {
  61. const canvas = document.querySelector( '#c' );
  62. const renderer = new THREE.WebGLRenderer( { antialias: true, canvas, alpha: true } );
  63. function makeScene( elem ) {
  64. const scene = new THREE.Scene();
  65. const fov = 45;
  66. const aspect = 2; // the canvas default
  67. const near = 0.1;
  68. const far = 5;
  69. const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
  70. camera.position.set( 0, 1, 2 );
  71. camera.lookAt( 0, 0, 0 );
  72. {
  73. const color = 0xFFFFFF;
  74. const intensity = 3;
  75. const light = new THREE.DirectionalLight( color, intensity );
  76. light.position.set( - 1, 2, 4 );
  77. scene.add( light );
  78. }
  79. return { scene, camera, elem };
  80. }
  81. function setupScene1() {
  82. const sceneInfo = makeScene( document.querySelector( '#box' ) );
  83. const geometry = new THREE.BoxGeometry( 1, 1, 1 );
  84. const material = new THREE.MeshPhongMaterial( { color: 'red' } );
  85. const mesh = new THREE.Mesh( geometry, material );
  86. sceneInfo.scene.add( mesh );
  87. sceneInfo.mesh = mesh;
  88. return sceneInfo;
  89. }
  90. function setupScene2() {
  91. const sceneInfo = makeScene( document.querySelector( '#pyramid' ) );
  92. const radius = .8;
  93. const widthSegments = 4;
  94. const heightSegments = 2;
  95. const geometry = new THREE.SphereGeometry( radius, widthSegments, heightSegments );
  96. const material = new THREE.MeshPhongMaterial( {
  97. color: 'blue',
  98. flatShading: true,
  99. } );
  100. const mesh = new THREE.Mesh( geometry, material );
  101. sceneInfo.scene.add( mesh );
  102. sceneInfo.mesh = mesh;
  103. return sceneInfo;
  104. }
  105. const sceneInfo1 = setupScene1();
  106. const sceneInfo2 = setupScene2();
  107. function resizeRendererToDisplaySize( renderer ) {
  108. const canvas = renderer.domElement;
  109. const width = canvas.clientWidth;
  110. const height = canvas.clientHeight;
  111. const needResize = canvas.width !== width || canvas.height !== height;
  112. if ( needResize ) {
  113. renderer.setSize( width, height, false );
  114. }
  115. return needResize;
  116. }
  117. function renderSceneInfo( sceneInfo ) {
  118. const { scene, camera, elem } = sceneInfo;
  119. // get the viewport relative position of this element
  120. const { left, right, top, bottom, width, height } =
  121. elem.getBoundingClientRect();
  122. const isOffscreen =
  123. bottom < 0 ||
  124. top > renderer.domElement.clientHeight ||
  125. right < 0 ||
  126. left > renderer.domElement.clientWidth;
  127. if ( isOffscreen ) {
  128. return;
  129. }
  130. camera.aspect = width / height;
  131. camera.updateProjectionMatrix();
  132. const positiveYUpBottom = renderer.domElement.clientHeight - bottom;
  133. renderer.setScissor( left, positiveYUpBottom, width, height );
  134. renderer.setViewport( left, positiveYUpBottom, width, height );
  135. renderer.render( scene, camera );
  136. }
  137. function render( time ) {
  138. time *= 0.001;
  139. resizeRendererToDisplaySize( renderer );
  140. renderer.setScissorTest( false );
  141. renderer.clear( true, true );
  142. renderer.setScissorTest( true );
  143. sceneInfo1.mesh.rotation.y = time * .1;
  144. sceneInfo2.mesh.rotation.y = time * .1;
  145. renderSceneInfo( sceneInfo1 );
  146. renderSceneInfo( sceneInfo2 );
  147. requestAnimationFrame( render );
  148. }
  149. requestAnimationFrame( render );
  150. }
  151. main();
  152. </script>
  153. </html>