Three 学习日志（九）—— 阵列立方体和相机适配体验
一、双层for循环创建阵列模型
const geometry = new THREE.BoxGeometry(100, 100, 100);
const material = new THREE.MeshLambertMaterial({
color: 0x00ffff,
transparent: true,
opacity: 0.5,
});
for (let i = 0; i < 10; i++) {
for (let j = 0; j < 10; j++) {
const mesh = new THREE.Mesh(geometry, material);
mesh.position.set(i * 200, 0, j * 200);
scene.add(mesh);
}
}
二、调整相机位置，改变观察范围
const camera = new THREE.PerspectiveCamera(30, width / height, 1, 3000);
camera.position.set(800, 800, 800);
camera.lookAt(0, 0, 0);
三、超出视锥体远裁界面的范围的会被剪裁掉，不渲染，可以调整far参数适配
const camera = new THREE.PerspectiveCamera(30, width / height, 1, 8000);
camera.position.set(2000, 2000, 2000);
camera.lookAt(0, 0, 0);
四、改变相机观测点
camera.lookAt(1000, 0, 1000);
const controls = new OrbitControls(camera, renderer.domElement);
controls.target.set(1000, 0, 1000);
controls.update();
五、完整代码
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Learn Threetitle>
<script src="../build/three.js">script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "../examples/jsm/"
}
}
script>
head>
<body>
<script type="module">
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
const scene = new THREE.Scene();
const axesHelper = new THREE.AxesHelper(150);
scene.add(axesHelper);
const geometry = new THREE.BoxGeometry(100, 100, 100);
const material = new THREE.MeshLambertMaterial({
color: 0x00ffff,
transparent: true,
opacity: 0.5,
});
for (let i = 0; i < 10; i++) {
for (let j = 0; j < 10; j++) {
const mesh = new THREE.Mesh(geometry, material);
mesh.position.set(i * 200, 0, j * 200);
scene.add(mesh);
}
}
const ambient = new THREE.AmbientLight(0xffffff, 0.4);
scene.add(ambient);
const width = window.innerWidth;
const height = window.innerHeight;
const camera = new THREE.PerspectiveCamera(30, width / height, 1, 8000);
camera.position.set(2000, 2000, 2000);
camera.lookAt(0, 0, 0);
camera.lookAt(1000, 0, 1000);
const renderer = new THREE.WebGLRenderer();
renderer.setSize(width, height);
renderer.render(scene, camera);
document.body.appendChild(renderer.domElement);
const controls = new OrbitControls(camera, renderer.domElement);
controls.target.set(1000, 0, 1000);
controls.update();
script>
body>
<style>
body {
overflow: hidden;
margin: 0px;
}
style>
html>
