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153 lines
3.3 KiB
HTML
153 lines
3.3 KiB
HTML
2 months ago
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<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>Three.js - Voxel Geometry - Merged</title>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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<script type="importmap">
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{
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"imports": {
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"three": "../../build/three.module.js",
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"three/addons/": "../../examples/jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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function main() {
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const canvas = document.querySelector( '#c' );
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const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
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const cellSize = 256;
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const fov = 75;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 1000;
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const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
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camera.position.set( cellSize / 2, 60, cellSize );
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const controls = new OrbitControls( camera, canvas );
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controls.target.set( cellSize / 2, 60, cellSize / 2 );
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controls.update();
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const scene = new THREE.Scene();
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scene.background = new THREE.Color( 'lightblue' );
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{
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const color = 0xFFFFFF;
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const intensity = 3;
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const light = new THREE.DirectionalLight( color, intensity );
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light.position.set( - 1, 2, 4 );
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scene.add( light );
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}
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const geometries = [];
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for ( let y = 0; y < cellSize; ++ y ) {
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for ( let z = 0; z < cellSize; ++ z ) {
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for ( let x = 0; x < cellSize; ++ x ) {
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const height = ( Math.sin( x / cellSize * Math.PI * 4 ) + Math.sin( z / cellSize * Math.PI * 6 ) ) * 20 + 60;
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//if (y < height) {
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if ( height > y && height < y + 1 ) {
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const geometry = new THREE.BoxGeometry( 1, 1, 1 );
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geometry.applyMatrix4( ( new THREE.Matrix4() ).makeTranslation( x, y, z ) );
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geometries.push( geometry );
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}
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}
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}
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}
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const mergedGeometry = BufferGeometryUtils.mergeGeometries(
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geometries, false );
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const material = new THREE.MeshPhongMaterial( { color: 'green' } );
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const mesh = new THREE.Mesh( mergedGeometry, material );
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scene.add( mesh );
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function resizeRendererToDisplaySize( renderer ) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const needResize = canvas.width !== width || canvas.height !== height;
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if ( needResize ) {
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renderer.setSize( width, height, false );
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}
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return needResize;
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}
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let renderRequested = false;
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function render() {
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renderRequested = undefined;
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if ( resizeRendererToDisplaySize( renderer ) ) {
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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controls.update();
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renderer.render( scene, camera );
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}
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render();
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function requestRenderIfNotRequested() {
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if ( ! renderRequested ) {
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renderRequested = true;
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requestAnimationFrame( render );
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}
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}
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controls.addEventListener( 'change', requestRenderIfNotRequested );
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window.addEventListener( 'resize', requestRenderIfNotRequested );
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}
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main();
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</script>
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</html>
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