Cyllista Game Engine

Last updated
Cyllista Game Engine
Original author(s) Junji Tago (Cyllista Game Engine General Manager) [1]
Developer(s) Cygames
Written in C++ / Python
Type Video game engine

The Cyllista Game Engine is a video game engine developed by Cygames for production of AAA video games on 'next-generation' video game consoles. The engine was developed in-house alongside the game Project Awakening (working title), with the game being used as a test bed for the engine's development.

Contents

The engine uses primarily C++ (user code), and Python (engine tools), as well as the Qt framework for visualization. Development of the engine started in the mid 2010s.


History

Development of a AAA video game title at Cygames "Project Awakening" began c. 2016, under the direction of Junji Tago. The company decided to develop their own video game engine for the title : rationales for developing their own engine include having fine control over performance and quality, as well as speed up iterative processes in development. Initially pre-existing engine was used in development of the title. [1] The engine supported most contemporarily modern rendering technologies such as physically based rendering, real-time global illumination, volumetric lighting; as well as modern production technologies such as photogrammetry, motion capture, procedural modeling, and sculpt modelling; however the pursuit of the latest tech in itself was not a priority for game production, only if it enabled specific gameplay. [1]

Junki Tago presented the engine at CEDEC (CESA Developers conference, 2017). [2] [3] At that time key features of the engine included a test driven design philosophy, including the use of Runtime Compiled C++ language for testing; a "Character-based User Interface" (CUI) instead of a Graphical User Interface (GUI) as the primary mode of interaction; and integration of key engine functions into a tool cybuild. Primary programming languages were C++ and Python. User-interface tools used both Python (documentaion, program docopt)), and Lua (autocomplete, program clink). [2] [3]

At CEDEC (2020) Kotaro Oki (Senior Game Engineer) presented information on the use of Python in the engine. [4] [5] Python was chosen as the main engine tool language due to wide adoption, large number of third party applications, and dynamic (non-compiled) running. [5] Other development software and tools used included Qt (Qt for Python, user interface); Pybind 11 (C++ bindings); Perforce (version control, collaboration); Shotgun (visual effect/animation project management, since 2021 known as ShotGrid); Wwise (audio); Maya (3D asset creation); and Houdini (3D animation). [6] Cyllista engine used Python version 3.7 though some software used Python 2, resulting in additional complexity. [7] Python testing tools included unittest, nose, coverage.py, and pytest; other Python tools included PEP8 (style guide), and Sphinx (documentation). [8] The core part of the game engine used C++ for high performance. [9] The programmers used type annotation and hints with the mypy static typing module in an attempt to trap errors that would otherwise only be apparent at runtime. [5]

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References

  1. 1 2 3 Cygames 2019.
  2. 1 2 CEDEC 2017.
  3. 1 2 gamebiz.jp 2017.
  4. ↑ CEDEC 2020.
  5. 1 2 3 gamebiz.jp 2020.
  6. ↑ CEDEC 2020, Slides 21-60.
  7. ↑ CEDEC 2020, Slides 60-62.
  8. ↑ CEDEC 2020, Slides 73-82.
  9. ↑ CEDEC 2020, Q&A.

Sources

Further Reading

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