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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Voxel Geometry - Separate Cubes</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const cellSize = 256;
- const fov = 75;
- const aspect = 2; // the canvas default
- const near = 0.1;
- const far = 1000;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.set( - cellSize * .3, cellSize * .8, - cellSize * .3 );
- const controls = new OrbitControls( camera, canvas );
- controls.target.set( cellSize / 2, cellSize / 3, cellSize / 2 );
- controls.update();
- const scene = new THREE.Scene();
- scene.background = new THREE.Color( 'lightblue' );
- {
- const color = 0xFFFFFF;
- const intensity = 3;
- const light = new THREE.DirectionalLight( color, intensity );
- light.position.set( - 1, 2, 4 );
- scene.add( light );
- }
- const cell = new Uint8Array( cellSize * cellSize * cellSize );
- for ( let y = 0; y < cellSize; ++ y ) {
- for ( let z = 0; z < cellSize; ++ z ) {
- for ( let x = 0; x < cellSize; ++ x ) {
- const height = ( Math.sin( x / cellSize * Math.PI * 4 ) + Math.sin( z / cellSize * Math.PI * 6 ) ) * 20 + cellSize / 2;
- if ( height > y && height < y + 1 ) {
- const offset = y * cellSize * cellSize +
- z * cellSize +
- x;
- cell[ offset ] = 1;
- }
- }
- }
- }
- const geometry = new THREE.BoxGeometry( 1, 1, 1 );
- const material = new THREE.MeshPhongMaterial( { color: 'green' } );
- for ( let y = 0; y < cellSize; ++ y ) {
- for ( let z = 0; z < cellSize; ++ z ) {
- for ( let x = 0; x < cellSize; ++ x ) {
- const offset = y * cellSize * cellSize +
- z * cellSize +
- x;
- const block = cell[ offset ];
- if ( block ) {
- const mesh = new THREE.Mesh( geometry, material );
- mesh.position.set( x, y, z );
- scene.add( mesh );
- }
- }
- }
- }
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- let renderRequested = false;
- function render() {
- renderRequested = undefined;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- controls.update();
- renderer.render( scene, camera );
- }
- render();
- function requestRenderIfNotRequested() {
- if ( ! renderRequested ) {
- renderRequested = true;
- requestAnimationFrame( render );
- }
- }
- controls.addEventListener( 'change', requestRenderIfNotRequested );
- window.addEventListener( 'resize', requestRenderIfNotRequested );
- }
- main();
- </script>
- </html>
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