Scripting in Dota 2 is handled by the VScript virtual machine using the Lua programming language. Lua will be launched at run time when Dota 2 loads your add-on and can manipulate most facets of the game.
The core functionality typically provided by a game engine includes a rendering engine ("renderer") for 2D or 3D graphics, a physics engine or collision detection (and collision response), sound, scripting, animation, artificial intelligence, networking, streaming, memory management, threading, localization support.
Lua is a powerful and fast programming language that is easy to learn and use and to embed into your application. Lua is designed to be a lightweight embeddable scripting language. It is used for all sorts of applications, from games to web applications and image processing.
