CG/sample7.html at master · NamikoToriyama/CG · GitHub

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<!DOCTYPE html>
<html>

<head>
  <!-- ボールが跳ねる
    参考：https://qiita.com/ayana_shi/items/c88dece936c7893b3543 -->
  <meta charset="utf-8" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/110/three.min.js"></script>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
    integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  <link rel="stylesheet" href="css/sample.css">

  <script>
    // ページの読み込みを待つ
    window.addEventListener('load', init);
    var g = 9.8; var m = 1;
    var width, height;
    var renderer;
    function initThree() {
      // サイズを指定
      width = window.innerWidth;
      height = window.innerHeight - document.getElementById("navbar").clientHeight;

      // レンダラーを作成
      renderer = new THREE.WebGLRenderer({
        canvas: document.querySelector('#myCanvas')
      });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(width, height);
      renderer.setClearColor(0xffffff, 1.0);
      renderer.shadowMapEnabled = true;
    }

    var scene;
    function initScene() {
      // シーンを作成
      scene = new THREE.Scene();
    }

    var camera;
    function initCamera() {
      // カメラを作成
      camera = new THREE.PerspectiveCamera(45, width / height);
      camera.position.set(-300, 200, 40);
      camera.lookAt(new THREE.Vector3(0, 0, 0));
    }

    var light;
    function initLight() {
      // 光を作成
      light = new THREE.DirectionalLight(0xFFFFFF, 2.0, 0);
      light.position.set(-150, 300, 10);
      scene.add(light);
      // 一つだともう一方の壁が照らされなかったため、光源を増やす
      light.position.set(-150, 300, 100);
      // light.castShadow = true;
      scene.add(light);
    }

    var sphere;
    function initObject() {
      // 床を作成
      var texture2 = new THREE.ImageUtils.loadTexture('imgs/woods.jpg');
      const meshFloor = new THREE.Mesh(
        new THREE.BoxGeometry(500, 0.1, 500),
        new THREE.MeshStandardMaterial({
          color: 0x808080,
          map: texture2,
          roughness: 0.05
        })
      );
      meshFloor.position.set(0, -30, 0);
      scene.add(meshFloor);
      meshFloor.receiveShadow = true;

      // 寂しいので壁もおく
      var texture_kabe = new THREE.ImageUtils.loadTexture('imgs/kabe.jpg');
      const wall1 = new THREE.Mesh(
        new THREE.BoxGeometry(250, 0.1, 500),
        new THREE.MeshStandardMaterial({
          color: 0xffffff,
          map: texture_kabe,
          roughness: 0.05
        })
      );
      wall1.position.set(250, -30 + 125, 0);
      wall1.rotation.set(0, 0, Math.PI / 2);
      scene.add(wall1);

      const wall2 = new THREE.Mesh(
        new THREE.BoxGeometry(500, 0.1, 250),
        new THREE.MeshStandardMaterial({
          color: 0xffffff,
          map: texture_kabe,
          roughness: 0.05
        })
      );
      wall2.position.set(0, -30 + 125, -250);
      wall2.rotation.set(Math.PI / 2, 0, 0);
      scene.add(wall2);


      // オブジェクトを作成
      // 球体のオブジェクト
      var texture1 = new THREE.ImageUtils.loadTexture('imgs/kin.jpeg');
      sphere = new THREE.Mesh(
        new THREE.SphereGeometry(30, 30, 30),     // ここで形を指定
        new THREE.MeshLambertMaterial({ color: 0xaaaaaa, map: texture1 }) // ここで色を指定
      );
      scene.add(sphere);
      sphere.rotation.set(0, 0, Math.PI / 2);
      sphere.position.set(0, 80, 0);
      sphere.castShadow = true;

      setting();
    }

    var y, g, v, t, e;
    var yb = 100;
    function setting() {
      y = sphere.position.y;  //距離
      g = -9.8;  //重力加速度
      v = 0.0;  //速度
      t = 0.15;  //時間
      e = -0.6;  //反発係数
      tick();
    }

    // 毎フレーム時に実行されるループイベント
    var requestID = 0;
    function tick() {
      renderer.clear();
      t += 0.001;
      v += g * t;
      y += v * t;
      // ボールの位置を変える
      var x = sphere.position.x;
      var z = sphere.position.z;
      // 沈むのを防止する
      if (t > 0.5){
        sphere.position.set(0, 0, 0);
      } else {
        sphere.position.set(x, y, z);
      }
      scene.add(sphere);

      // 床に着いたら跳ねるようにする
      if (y < 0) {
        y = 0;
        v *= e;
      }


      renderer.render(scene, camera);
      camera.lookAt(new THREE.Vector3(0, 0, 0));
      requestID = requestAnimationFrame(tick);
    }

    function reset() {
      cancelAnimationFrame(requestID);
      // だんだん高くなる
      yb += 50;
      sphere.position.y = yb;
      setting();
    }

    function init() {
      initThree();
      initCamera();
      initScene();
      initLight();
      initObject();
      renderer.clear();
      renderer.render(scene, camera);
    }

    var down = false;
    var sy = 0, sz = 0;
    window.onmousedown = function (ev) {    //マウスダウン
      if (ev.target == renderer.domElement) {
        down = true;
        sy = ev.clientX; sz = ev.clientY;
      }
    };
    window.onmouseup = function () {        //マウスアップ
      down = false;
    };
    window.onmousemove = function (ev) {   //マウスムーブ
      var speed = 2;
      if (down) {
        if (ev.target == renderer.domElement) {
          var dy = -(ev.clientX - sy);
          var dz = -(ev.clientY - sz);
          camera.position.y += dy * speed;
          camera.position.z -= dz * speed;
          sy -= dy;
          sz -= dz;
        }
      }
    }
    window.onmousewheel = function (ev) {   //マウスホイール
      var speed = 0.2;
      camera.position.x += ev.wheelDelta * speed;
    }

  </script>
</head>

<body>
  <nav class="navbar navbar-expand-lg navbar-light bg-light" id="navbar">
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item active">
          <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="sample5.html">作品1</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="sample6.html">作品2</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="sample7.html">作品3</a>
        </li>
        <button class="btn btn-outline-success my-2 my-sm-0" onclick="reset()">Reset</button>
      </ul>
    </div>
  </nav>
  <div id="content">
    <canvas id="myCanvas"></canvas>
  </div>
</body>

</html>