3D parent-child structure in Three.js's game

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3D parent-child structure in Three.js
Developer anonymous｜Date and time 70/1/1 9:35:04
Build time unknown sec｜Game capacity 2.104KB｜

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <script type="importmap">
      {
        "imports": {
          "three": "https://unpkg.com/three@0.152.2/build/three.module.js"
        }
      }
    </script>
    <script type="module">
      import * as THREE from "three";

// サイズを指定
      const width = 960;
      const height = 540;

// レンダラーを作成
      const renderer = new THREE.WebGLRenderer({
        canvas: document.querySelector("#myCanvas"),
      });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(width, height);

// シーンを作成
      const scene = new THREE.Scene();

// カメラを作成
      const camera = new THREE.PerspectiveCamera(45, width / height);
      camera.position.set(-100, 150, 500);
      camera.lookAt(new THREE.Vector3(0, 0, 0));

// 地面を作成
      scene.add(new THREE.GridHelper(600));
      scene.add(new THREE.AxesHelper(300));

// グループを作る
      const group = new THREE.Group();
      // 3D空間にグループを追加する
      scene.add(group);

for (let i = 0; i < 10; i++) {
        // 直方体を作成
        const material = new THREE.MeshNormalMaterial();
        const geometry = new THREE.SphereGeometry(30, 30, 30);
        const mesh = new THREE.Mesh(geometry, material);

// 配置座標を計算
        const radian = (i / 10) * Math.PI * 2;
        mesh.position.set(
          200 * Math.cos(radian), // X座標
          30, // Y座標
          200 * Math.sin(radian) // Z座標
        );

// グループに追加する
        group.add(mesh);
      }

tick();

// 毎フレーム時に実行されるループイベントです
      function tick() {
        group.rotation.y += 0.01;

// レンダリング
        renderer.render(scene, camera);
        requestAnimationFrame(tick);
      }
    </script>
  </head>
  <body>
    <canvas id="myCanvas"></canvas>
  </body>
</html>