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Craft Warriors x AR

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2018/08/02に行われた、Google Cloud主催のINEVITABLE ja night 5で発表したプレゼン資料です。
前半は弊社代表の高場が発表し、後半の導入時の知見は松下が発表しました。
https://cloudplatformonline.com/inevitable-ja-night-5.html

Published in: Technology
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Craft Warriors x AR

  1. 1. 高場大樹 / CEO 松下雅和 / CTO 登壇者紹介
  2. 2. ビジョン
  3. 3. 開発タイトル 累計5000万ダウンロード突破! (海外利用者比率95%)
  4. 4. ● 2018年4月20日リリース ● リアルタイムストラテジー ● 18言語に対応 ● 300万ダウンロード突破 ● 日本ユーザ10% Craft Warriorsとは
  5. 5. ゲーム紹介
  6. 6. クラフト機能で自由にモデル作成
  7. 7. ● ゲームの特徴(クラフト機能)をもっと活かしたい ● AR機能でモデル表示すると楽しいかも? ○ ARCoreが発表された翌週には大体出来た 開発に至った経緯
  8. 8. Craft WarriorsのAR機能
  9. 9. ARCore導入の知見
  10. 10. ● ARCore Developer Preview版での導入 ○ ARCore導入時(2017年9月)はまだバージョンが付いておらず、Developer Preview状態 ○ 公式サンプル以外の情報が皆無 (Craft Warriorsが利用しているcocos2d-xは特に情報がなかった) ○ ARCore自体もまだ不安定 ■ ARCoreが利用できるかどうか判定する関数に不具合があり、Tango のAPIを利用して回避するような状況 ○ 現在はARCore 1.1.0を利用中 ARCore導入時に苦労した点
  11. 11. ● セットアップ方法の模索 ○ 公式サンプルはActivity#onCreate()で初期化処理 ○ Craft WarriorsではARはおまけ機能、必要に応じて後からセットアップする 仕組みに ■ cocos2d-xで通常使用しているrunOnGLThreadではなく、 runOnUiThreadでの実行が必要だった ARCore導入時に苦労した点
  12. 12. ● カメラ画面とゲーム画面による描画 ○ ゲーム内の実装をそのまま活用するため、ゲーム画面を透過にして裏にカ メラ画面を配置する仕組みに ○ GLSurfaceViewを二重に配置する仕組み(透過処理に苦戦) ARCore導入時に苦労した点 ARのカメラ画面 (GLSurfaceView) cocos2d-x (Cocos2dxGLSurfaceView)
  13. 13. ● ARCore空間とゲーム内空間を同期 ○ 異なる空間同士の座標の扱いが難しいため、ARCoreが見つけた最初のア ンカーの座標をゲーム内空間の(0,0,0)位置となるように行列計算 ○ ARCore空間とゲーム内空間の座標や角度の位置ズレをProjectionMatrix を同期させて調整 ARCore導入時に苦労した点
  14. 14. ● ARCore上でレンダリングした場合と比較しても、違和感がない程度までゲーム 内画面の同期が可能に ○ まだ同期がズレておかしくなる場合があるので改善予定 ○ cocos2d-xが公式にARKitとARCoreをサポートするかどうかは不明だが、 今回のやり方であれば短期間で導入可能 ● 先行してARKit対応していたが、APIが似ていたので実装しやすかった ● ARKitに比べ、ARCoreの方が平面検出が速くて正確な印象 ARCore導入の感想
  15. 15. AR利用例

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