【Unity】WebGLでビルドしてレスポンシブにWordPressに埋め込む

WebGLでビルドしてWebに埋め込みたいときってありますよね
でも出力したデータをそのまま埋め込むとスマホで見たときにサイズが合わなかったりします

目次

index.htmlの編集

デフォルトで出力した際のindex.htmlはこうなっています
※編集する箇所は色を塗ってあります

<!DOCTYPE html>
<html lang="en-us">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Unity WebGL Player | KaspinIron</title>
    <link rel="shortcut icon" href="TemplateData/favicon.ico">
    <link rel="stylesheet" href="TemplateData/style.css">
  </head>
  <body>
    <div id="unity-container" class="unity-desktop">
      <canvas id="unity-canvas"></canvas>
      <div id="unity-loading-bar">
        <div id="unity-logo"></div>
        <div id="unity-progress-bar-empty">
          <div id="unity-progress-bar-full"></div>
        </div>
      </div>
      <div id="unity-mobile-warning">
        WebGL builds are not supported on mobile devices.
      </div>
      <div id="unity-footer">
        <div id="unity-webgl-logo"></div>
        <div id="unity-fullscreen-button"></div>
        <div id="unity-build-title">KaspinIron</div>
      </div>
    </div>
    <script>
      var buildUrl = "Build";
      var loaderUrl = buildUrl + "/KaspingIronWeb.loader.js";
      var config = {
        dataUrl: buildUrl + "/KaspingIronWeb.data",
        frameworkUrl: buildUrl + "/KaspingIronWeb.framework.js",
        codeUrl: buildUrl + "/KaspingIronWeb.wasm",
        streamingAssetsUrl: "StreamingAssets",
        companyName: "FLITCH",
        productName: "KaspinIron",
        productVersion: "0.1",
      };

      var container = document.querySelector("#unity-container");
      var canvas = document.querySelector("#unity-canvas");
      var loadingBar = document.querySelector("#unity-loading-bar");
      var progressBarFull = document.querySelector("#unity-progress-bar-full");
      var fullscreenButton = document.querySelector("#unity-fullscreen-button");
      var mobileWarning = document.querySelector("#unity-mobile-warning");

      if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {
        container.className = "unity-mobile";
        config.devicePixelRatio = 1;
        mobileWarning.style.display = "block";
        setTimeout(() => {
          mobileWarning.style.display = "none";
        }, 5000);
      } else {
        canvas.style.width = "1600px";
        canvas.style.height = "900px";
      }
      loadingBar.style.display = "block";

      var script = document.createElement("script");
      script.src = loaderUrl;
      script.onload = () => {
        createUnityInstance(canvas, config, (progress) => {
          progressBarFull.style.width = 100 * progress + "%";
        }).then((unityInstance) => {
          loadingBar.style.display = "none";
          fullscreenButton.onclick = () => {
            unityInstance.SetFullscreen(1);
          };
        }).catch((message) => {
          alert(message);
        });
      };
      document.body.appendChild(script);
    </script>
  </body>
</html>

以下のように編集します

<!DOCTYPE html>
<html lang="en-us">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Unity KaspinIron</title>
    <link rel="shortcut icon" href="TemplateData/favicon.ico">
    <link rel="stylesheet" href="TemplateData/style.css">
  </head>
  <body>
    <div id="unity-container" class="unity-desktop">
      <canvas id="unity-canvas"></canvas>
      <div id="unity-loading-bar">
        <div id="unity-logo"></div>
        <div id="unity-progress-bar-empty">
          <div id="unity-progress-bar-full"></div>
        </div>
      </div>
    </div>
    <script>
      var buildUrl = "Build";
      var loaderUrl = buildUrl + "/KaspingIronWeb.loader.js";
      var config = {
        dataUrl: buildUrl + "/KaspingIronWeb.data",
        frameworkUrl: buildUrl + "/KaspingIronWeb.framework.js",
        codeUrl: buildUrl + "/KaspingIronWeb.wasm",
        streamingAssetsUrl: "StreamingAssets",
        companyName: "FLITCH",
        productName: "KaspinIron",
        productVersion: "0.1",
      };

      var container = document.querySelector("#unity-container");
      var canvas = document.querySelector("#unity-canvas");
      var loadingBar = document.querySelector("#unity-loading-bar");
      var progressBarFull = document.querySelector("#unity-progress-bar-full");
      var fullscreenButton = document.querySelector("#unity-fullscreen-button");
      var mobileWarning = document.querySelector("#unity-mobile-warning");

      if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {
        container.className = "unity-mobile";
        config.devicePixelRatio = 1;
    }
    
         // 画面サイズの指定
      // document.documentElement.clientWidthで画面の横向きのピクセル数を取得
      canvas.style.height =
        (document.documentElement.clientWidth / 16) * 9 * 0.9 + "px";
      canvas.style.width = document.documentElement.clientWidth * 0.9 + "px";

      loadingBar.style.display = "block";

      var script = document.createElement("script");
      script.src = loaderUrl;
      script.onload = () => {
        createUnityInstance(canvas, config, (progress) => {
          progressBarFull.style.width = 100 * progress + "%";
        })
          .then((unityInstance) => {
            loadingBar.style.display = "none";
          })
          .catch((message) => {
            alert(message);
          });
      };
      document.body.appendChild(script);
    </script>
  </body>
</html>

style.cssの編集

TemplateDataフォルダの中のstyle.cssを編集します
デフォルトでは以下のようになっています

body { padding: 0; margin: 0 }
#unity-container { position: absolute }
#unity-container.unity-desktop { left: 50%; top: 50%; transform: translate(-50%, -50%) }
#unity-container.unity-mobile { width: 100%; height: 100% }
#unity-canvas { background: #231F20 }
.unity-mobile #unity-canvas { width: 100%; height: 100% }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none }
#unity-logo { width: 154px; height: 130px; background: url('unity-logo-dark.png') no-repeat center }
#unity-progress-bar-empty { width: 141px; height: 18px; margin-top: 10px; background: url('progress-bar-empty-dark.png') no-repeat center }
#unity-progress-bar-full { width: 0%; height: 18px; margin-top: 10px; background: url('progress-bar-full-dark.png') no-repeat center }
#unity-footer { position: relative }
.unity-mobile #unity-footer { display: none }
#unity-webgl-logo { float:left; width: 204px; height: 38px; background: url('webgl-logo.png') no-repeat center }
#unity-build-title { float: right; margin-right: 10px; line-height: 38px; font-family: arial; font-size: 18px }
#unity-fullscreen-button { float: right; width: 38px; height: 38px; background: url('fullscreen-button.png') no-repeat center }
#unity-mobile-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none }

以下のように編集します

body { padding: 0; margin: 0 }
#unity-container { position: absolute }
#unity-container.unity-desktop { left: 50%; top: 50%; transform: translate(-50%, -50%) }
#unity-container.unity-mobile { left: 50%; top: 50%; transform: translate(-50%, -50%) }
#unity-canvas { background: #231F20 }
.unity-mobile #unity-canvas { width: 100%; height: 100% }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none }
#unity-logo { width: 154px; height: 130px; background: url('unity-logo-dark.png') no-repeat center }
#unity-progress-bar-empty { width: 141px; height: 18px; margin-top: 10px; background: url('progress-bar-empty-dark.png') no-repeat center }
#unity-progress-bar-full { width: 0%; height: 18px; margin-top: 10px; background: url('progress-bar-full-dark.png') no-repeat center }
#unity-footer { position: relative }
.unity-mobile #unity-footer { display: none }
#unity-webgl-logo { float:left; width: 204px; height: 38px; background: url('webgl-logo.png') no-repeat center }
#unity-build-title { float: right; margin-right: 10px; line-height: 38px; font-family: arial; font-size: 18px }
#unity-fullscreen-button { float: right; width: 38px; height: 38px; background: url('fullscreen-button.png') no-repeat center }
#unity-mobile-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none }
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