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132 lines
3.5 KiB
132 lines
3.5 KiB
2 years 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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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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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({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 = 1;
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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.mergeBufferGeometries(
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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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