ChristmasTree_Three.js/tree.html at main · hiranuma/ChristmasTree_Three.js · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Christmas Tree</title>
  <style>
    body { margin: 0; }
    canvas { display: block; }
  </style>
  <script type="importmap">
    {
      "imports": {
        "three": "https://cdn.jsdelivr.net/npm/three@0.167.0/build/three.module.js",
        "OrbitControls": "https://cdn.jsdelivr.net/npm/three@0.167.0/examples/jsm/controls/OrbitControls.js"
      }
    }
  </script>
</head>
<body>
<script type="module">
import * as THREE from 'three';
import { OrbitControls } from 'OrbitControls';

class ChristmasTree {
  constructor() {
    this.scene = new THREE.Scene();
    const groundSize = 60;
    const treeHeight = 16;
    const trunkRadius = 6; // 幹の半径
    const trunkOffsetY = 3; // 幹のオフセット
    this.createGround(groundSize);
    this.createTree(treeHeight, trunkRadius, trunkOffsetY);
    this.createOrnaments(treeHeight, trunkOffsetY);
    this.createClouds(treeHeight, trunkOffsetY);
    this.createStar(treeHeight);
    this.createSky();
    this.init();
  }

  init() {
    this.setupCameraAndRenderer();
    this.animate();
  }

  setupCameraAndRenderer() {
    const fieldOfView = 75; // カメラの視野角
    const aspectRatio = window.innerWidth / window.innerHeight;
    const nearPlane = 0.1;
    const farPlane = 1000; // カメラの遠近感
    this.camera = new THREE.PerspectiveCamera(fieldOfView, aspectRatio, nearPlane, farPlane);
    this.camera.position.set(0, 15, 25);

    this.renderer = new THREE.WebGLRenderer();
    this.renderer.setSize(window.innerWidth, window.innerHeight);
    document.body.appendChild(this.renderer.domElement);

    this.controls = new OrbitControls(this.camera, this.renderer.domElement);
    this.controls.enableDamping = true;
    this.controls.dampingFactor = 0.05;

    const ambientLightIntensity = 2.5;
    const ambientLightColor = 0xffffff;
    const ambientLight = new THREE.AmbientLight(ambientLightColor, ambientLightIntensity);
    this.scene.add(ambientLight);

    const directionalLight = new THREE.DirectionalLight(0xffffff, 1.5);
    directionalLight.position.set(10, 20, 10);
    this.scene.add(directionalLight);
  }

  createGround(groundSize) {
    const groundGeometry = new THREE.PlaneGeometry(groundSize, groundSize);
    const groundMaterial = new THREE.MeshStandardMaterial({
      color: 0xffffff,
      roughness: 0.3,
      side: THREE.DoubleSide,
    });
    const ground = new THREE.Mesh(groundGeometry, groundMaterial);
    ground.rotation.x = -Math.PI / 2;
    this.scene.add(ground);
  }

  createBranch(length, thickness) {
    const branchMaterial = new THREE.MeshStandardMaterial({ color: 0x228B22 });
    const branchGeometry = new THREE.CylinderGeometry(thickness, thickness / 4, length, 8);
    branchGeometry.translate(0, -length / 2, 0);
    branchGeometry.rotateZ(Math.PI / 2);
    return new THREE.Mesh(branchGeometry, branchMaterial);
  }

  createTree(treeHeight, trunkRadius, trunkOffsetY) {
    const tree = new THREE.Group();
    const trunkScale = 0.1; // 幹のスケール
    const trunk = new THREE.Mesh(
      new THREE.CylinderGeometry(trunkRadius * trunkScale * 0.01, trunkRadius * trunkScale, treeHeight, 8),
      new THREE.MeshStandardMaterial({ color: 0x8B4513 })
    );
    trunk.position.y = treeHeight / 2;
    tree.add(trunk);

	  const numBranchLevels = Math.floor(treeHeight / 0.5);
    const lengthScale = 0.8;
    for (let i = trunkOffsetY; i <= numBranchLevels; i++) {
      const y = (i / (numBranchLevels + trunkOffsetY)) * treeHeight + trunkOffsetY / 2;
      const levelRadius = trunkRadius * (1 - i / numBranchLevels);
      const branchLength = levelRadius * lengthScale;
      const branchCount = 8 + Math.floor(Math.random() * 5);

      for (let j = 0; j < branchCount; j++) {
        const angle = (j / branchCount) * Math.PI * 2;
        const branch = this.createBranch(branchLength, levelRadius * 0.08);
        branch.position.set(Math.cos(angle) * levelRadius * 0.1, y, Math.sin(angle) * levelRadius * 0.1);
        branch.rotation.z = angle;
        branch.rotation.x = Math.PI / 2 - (i / numBranchLevels) * Math.PI / 4;
        tree.add(branch);
      }
    }
    this.scene.add(tree);
  }

  createOrnaments(treeHeight, offsetY) {
    const ornaments = new THREE.Group();
    const ornamentColors = [0xaa0000, 0x0055aa, 0xaaaa00];
    const ornamentRadius = 0.4;
    const rows = 5; // 飾りの行数

    const baseRadius = 4; // 基本的な半径 (調整可能)
    const ornamentSpacing = 1.2; // 飾り間隔

    for (let i = 0; i < rows; i++) {
      const numOrnamentsPerRow = i * 2 + 2; // 行ごとの飾りの数
      for (let j = 0; j < numOrnamentsPerRow; j++) {
        const color = Math.random() * ornamentColors.length;
        const ornament = new THREE.Mesh(
          new THREE.SphereGeometry(ornamentRadius, 16, 16),
          new THREE.MeshStandardMaterial({
            color: ornamentColors[color | 0],
            roughness: 0.5, // 鏡面反射の度合い
            metalness: 0.7, // 金属っぽい質感を出す
          })
        );

        // 円周上の均等な位置に飾りを配置
        const angle = (i / numOrnamentsPerRow) * Math.PI * 2 + (j / numOrnamentsPerRow) * Math.PI * 2;
        const distanceFromTree = baseRadius / (rows - i); // ツリーの周囲に配置する半径(調整可能)
        const x = Math.cos(angle) * distanceFromTree;
        const z = Math.sin(angle) * distanceFromTree;
        const yScale = 0.8; // 飾りの高さのスケール(調整可能)
        const yJitter = 0.5; // 飾りの高さのランダム要素(調整可能)
        const y = (treeHeight * yScale) - (treeHeight * yScale - offsetY) * (i / rows) + (Math.random() * yJitter * 2 - yJitter); // ツリーの高さに合わせて飾りの高さを調整

        ornament.position.set(x, y, z);
        ornaments.add(ornament);
      }
    }

     ornaments.position.y = 0; // ツリーのベースに合わせ調整
    this.scene.add(ornaments);
  }

  createClouds(treeHeight, offsetY) {
    const cloudGeometry = new THREE.SphereGeometry(0.2, 32, 32);
    const cloudMaterial = new THREE.MeshStandardMaterial({ color: 0xeeeeee, opacity: 0.9, transparent: true });
    const numClouds = 120; // 雲の数

    const cloudGroup = new THREE.Group();
    this.scene.add(cloudGroup);

    for (let i = 0; i < numClouds; i++) {
      const cloud = new THREE.Mesh(cloudGeometry, cloudMaterial);
      const cloudRadius = 0.8 - (i / (numClouds - 1)) * 0.6; // 螺旋の半径
      const cloudScale = cloudRadius * 3.6; // 雲のサイズ調整
      cloud.scale.set(cloudScale, cloudScale, cloudScale);

      const angle = i * 0.3; // 螺旋の回転角度(調整可能)
      const cloudHeightScale = 0.9; // 木に対する雲の高さのスケール(調整可能)

      // 雲の高さ
      const cloudHeight = offsetY + (treeHeight * cloudHeightScale - offsetY) * (i / (numClouds)); // ツリーの高さに合わせて雲の高さを調整

      // 雲のX、Y座標を螺旋状に配置
      const treeRadius = 4.0; // ツリーの周囲に雲を配置する半径(調整可能)
      const cloudX = treeRadius * Math.cos(angle) * (numClouds - i) / numClouds;
      const cloudY = treeRadius * Math.sin(angle) * (numClouds - i) / numClouds;

      cloud.position.set(cloudX, cloudY, cloudHeight);
      cloudGroup.add(cloud);
    }

    //雲の全体の回転と配置調整
    cloudGroup.rotation.x = -Math.PI / 2; //全体の回転調整
    cloudGroup.position.y = 0; //調整
  }

  createStar(treeHeight) {
    const createStarShape = (innerRadius, outerRadius, numPoints, scale) => {
      const shape = new THREE.Shape();
      const angleStep = Math.PI / numPoints;
      for (let i = 0; i <= numPoints * 2; i++) {
        const angle = i * angleStep;
        const radius = i % 2 === 0 ? outerRadius * scale : innerRadius * scale;
        const x = Math.sin(angle) * radius;
        const y = Math.cos(angle) * radius;
        shape[i === 0 ? 'moveTo' : 'lineTo'](x, y);
      }
      return shape;
    };

    const starShape = createStarShape(0.5, 1, 5, 0.6);
    const starGeometry = new THREE.ExtrudeGeometry(starShape, { depth: 0.1, bevelEnabled: false });
    const starMaterial = new THREE.MeshStandardMaterial({
      color: 0xffff00,
      roughness: 0.3,
      metalness: 0.7
    });
    const star = new THREE.Mesh(starGeometry, starMaterial);
    star.position.y = treeHeight;
    this.scene.add(star);
  }

  createSky() {
    const skyGeometry = new THREE.SphereGeometry(100, 32, 32);
    const skyMaterial = new THREE.MeshBasicMaterial({ color: 0x87ceeb, side: THREE.BackSide });
    const sky = new THREE.Mesh(skyGeometry, skyMaterial);
    this.scene.add(sky);
  }

  createSnow(scene, renderer) {
    // 雪の粒子数
    const numParticles = 500;
    // 雪の粒子グループ
    const particles = new THREE.Group();
    scene.add(particles);

    // 雪の粒子の材質
    const particleMaterial = new THREE.PointsMaterial({
      color: 0xFFFFFF, // 白
      size: 0.5, // 粒子の大きさ
      sizeAttenuation: true, // カメラの距離に応じて粒子サイズを調整
      transparent: true,
      opacity: 0.8,
      blending: THREE.AdditiveBlending, // 重なり合った時に明るくする
      depthWrite: false, // 深度バッファを書き込まないようにする (重なり合った時に奥の粒子が見えなくなるのを防ぐ)
    });

    // 雪の粒子のジオメトリ
    const particleGeometry = new THREE.BufferGeometry();

    // 粒子座標を格納する配列 (x, y, z)
    const positions = [];
    for (let i = 0; i < numParticles; i++) {
      // ランダムな位置に生成
      const x = Math.random() * 10 - 5;
      const y = Math.random() * 10 + 5;  // y座標を高く
      const z = Math.random() * 10 - 5;
      positions.push(x, y, z);
    }

    particleGeometry.setAttribute(
      'position',
      new THREE.Float32BufferAttribute(positions, 3)
    );

    // 粒子のインスタンス作成
    const points = new THREE.Points(particleGeometry, particleMaterial);
    particles.add(points);

    // 雪の降りの速度
    const fallingSpeed = 0.01;

    function animate() {
      // 粒子たちのy座標を更新
      const positionsArray = particleGeometry.attributes.position.array;
      for (let i = 0; i < positionsArray.length; i += 3) {
        positionsArray[i + 1] -= fallingSpeed; // y座標を減少させる

        // 画面外に出たら、上部からランダムな場所に再生成
        if (positionsArray[i + 1] < -5) {
          positionsArray[i + 1] = 10; // yを上に
          positionsArray[i] = Math.random() * 10 - 5;
          positionsArray[i + 2] = Math.random() * 10 - 5;
        }
      }
      particleGeometry.attributes.position.needsUpdate = true;

      requestAnimationFrame(animate);
      renderer.render(scene, camera);
    }

    return {animate};
  }

  animate() {
    requestAnimationFrame(() => this.animate());
    this.controls.update();
    this.renderer.render(this.scene, this.camera);
  }
}

const tree = new ChristmasTree();
</script>
</body>
</html>