1 / 17

Lua Scripting in C#

Lua Scripting in C#. How to Set Things Up. Download LuaInterface Source code is available to recompile if needed 51Net4 available from 3103 site (ready for .NET 4) Unzip lua51.dll and LuaInterface.dll Place these DLL files in your project Add them as Reference

dbrenda
Download Presentation

Lua Scripting in C#

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lua Scripting in C#

  2. How to Set Things Up • Download LuaInterface • Source code is available to recompile if needed • 51Net4 available from 3103 site (ready for .NET 4) • Unzip • lua51.dll and LuaInterface.dll • Place these DLL files in your project • Add them as Reference • Add “using LuaInterface;” atop code

  3. Adding the DLL references

  4. The LuaInterface Object LuaInterface l = new Lua(); // executing a single command l.DoString("a=4"); //reading a variable Console.WriteLine(l["a"]); // finishing off l.Close();

  5. Simple Lua Example

  6. What’s Happening C# Code Main l Heap (Memory) LuaInterface Instance (internal runtime data) a 4

  7. LuaInterface (LI) is Persistent • Edit variables in script space • Executing commands • Writing to variables directly • Note the value remains (i.e., think of them as properties within LI)

  8. Running a Script In File C# Code Main l Heap (Memory) Script File (on Disk) LuaInterface Instance (internal runtime data) a Lua Code a = 4 4 LuaInterface.Lua l = new Lua(); l.DoFile(@"Scripts\SimpleScript.lua"); l.Close();

  9. Errors… Must Change Property…

  10. More Errors…

  11. Solution: File Formatting

  12. Lua and NET Interaction Heap (Memory) C# Code Main Worker w LuaInterface Instance (internal runtime data) MainProgram a 4 Worker LuaInterface l string Data DisplaySomething() { … } Script File (on Disk) Lua Code a = 4 MainProgram.Data = “Hello World” MainProgram:DisplaySomething()

  13. Accessing CLR/NET Objects • In Lua, we can access attributes using the dot (.) operator • MainProgram.Data = "Hello World" • We can also invoke methods using the colon (:) operator • MainProgram:DisplaySomething()

  14. Handling Events • In C#, you can define new events • public delegate void SimpleEventHandler(); • public event EventHandler SimpleEvent; • Then you can raise the event • SimpleEvent(this, null); • Subscribing to the event enables handling • SimpleEvent += new SimpleEventHandler(DoFunction);

  15. Handling Events in Lua function handle_event() a = a + 1 MainProgram:DisplayState() end function handle_event_different() a = a + 10 end MainProgram.SimpleEvent:Add(handle_event) MainProgram.SimpleEvent:Add(handle_event_different) a = 0

  16. Testing theEvent Handler l = newLua(); l["MainProgram"] = this; l.DoFile(@"Scripts\SimpleScript.lua"); Timer t = newTimer(newTimerCallback(TimerFired), null, 0, 1000); Console.ReadLine(); l.Close(); privatevoid TimerFired(Object state) { SimpleEvent(this, null); } function handle_event() a = a + 1 MainProgram:DisplayState() end function handle_event_different() a = a + 10 end MainProgram.SimpleEvent:Add(handle_event) MainProgram.SimpleEvent:Add(handle_event_different) a = 0

  17. Further Reading • http://luaforge.net/projects/luainterface/ • http://www.chipmunkav.com/support/guide.pdf • http://lua-users.org/wiki/LuaInterface • http://karlagius.com/2007/09/29/luainterface/ • http://penlight.luaforge.net/project-pages/penlight/packages/LuaInterface/ • http://www.godpatterns.com/2005/07/using-lua-scripting-for-games.html

More Related