Three Learning Log (10) - Common geometric bodies (cuboid, sphere, cylinder, rectangular plane, circular plane)
1. Construct commonly used geometries
const geometry_list = []
const geometry_box = new THREE.BoxGeometry(100, 100, 100);
geometry_list.push(geometry_box);
const geometry_sphere = new THREE.SphereGeometry(50);
geometry_list.push(geometry_sphere);
const geometry_cylinder = new THREE.CylinderGeometry(50, 50, 100);
geometry_list.push(geometry_cylinder);
const geometry_plane = new THREE.PlaneGeometry(100, 50);
geometry_list.push(geometry_plane);
const geometry_circle = new THREE.CircleGeometry(50);
geometry_list.push(geometry_circle);
const material = new THREE.MeshLambertMaterial({
color: 0x00ffff,
transparent: true,
opacity: 0.5,
side: THREE.DoubleSide,
});
2. Traverse and join the scene
for (const gIdx in geometry_list) {
const mesh = new THREE.Mesh(geometry_list[gIdx], material);
mesh.position.set(gIdx * 150, 0, 0);
scene.add(mesh);
}
3. Effect display
4. Complete code
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Learn Three</title>
<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_list = []
const geometry_box = new THREE.BoxGeometry(100, 100, 100);
geometry_list.push(geometry_box);
const geometry_sphere = new THREE.SphereGeometry(50);
geometry_list.push(geometry_sphere);
const geometry_cylinder = new THREE.CylinderGeometry(50, 50, 100);
geometry_list.push(geometry_cylinder);
const geometry_plane = new THREE.PlaneGeometry(100, 50);
geometry_list.push(geometry_plane);
const geometry_circle = new THREE.CircleGeometry(50);
geometry_list.push(geometry_circle);
const material = new THREE.MeshLambertMaterial({
color: 0x00ffff,
transparent: true,
opacity: 0.5,
side: THREE.DoubleSide,
});
for (const gIdx in geometry_list) {
const mesh = new THREE.Mesh(geometry_list[gIdx], material);
mesh.position.set(gIdx * 150, 0, 0);
scene.add(mesh);
}
const ambient = new THREE.AmbientLight(0xffffff, 0.8);
scene.add(ambient);
const camera = new THREE.PerspectiveCamera();
camera.position.set(800, 800, 800);
camera.lookAt(200, 0, 0);
const width = window.innerWidth;
const height = window.innerHeight;
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.addEventListener('change', function () {
renderer.render(scene, camera);
});
</script>
</body>
<style>
body {
overflow: hidden;
margin: 0px;
}
</style>
</html>