dodolab/cogengine

Component-oriented 2D game engine for OpenFrameworks

ofxCogEngine

What's the CogEngine?

CogEngine stands for C++ component-oriented game engine. It can be used as a tool for creating 2D windows or mobile games. It is implemented as an OpenFrameworks addon.

Budget: over 600 working hours

Platforms

• Windows
• Linux
• Android

Features

• Scene graph
• ECS pattern (messaging, generic attributes, flags, behaviors, components)
• Animations
• Finite state machines
• Goal-driven behavior components
• Steering behaviors
• Monte-Carlo tree search
• A* Path-finding
• SQLite database
• Custom networking protocol for multiplayer
• XML and JSON parsers for certain components
• Lua scripting language

Projects

• Hydroq
  • RTS game with Monte Carlo AI
  • available here
  • !!only works with the version 0.2 of this engine (link)

• Arkanoid clone
  • included in the Example folder

• Paratrooper clone
  • included in the Example folder

How to use it

• Tutorial - getting started
• Architecture - brief description of the architecture

Component Architecture

• The whole game is made of components
• Component is an entity that defines functional behavior for the whole application or its part (is not attached to any game object)
• Behavior is a component that is attached to a game object, defining its functionality
• Node is a part of scene graph, represents a single entity (usually a game object)
• Attribute is a generic attribute, kept in a collection the Node has a reference to
• The overall behavior of a particular game object is determined by the aggregation of its behaviors and attributes

Component Architecture Example

Scene

Objects

Component architecture

Compatibility

Works with OpenFrameworks 0.9.8

LICENSE and ATTRIBUTIONS

• ofxCogEngine is made available under the MIT license.
• ofxCogEngine bundles catch framework, lua scripting language, luabridge binder, sqlite and following OpenFrameworks addons: ofxNetwork, ofxSQLite, ofxTextLabel, ofxXmlSettings