Integrating LUA and C++ in the same project

[martyj]

I have been trying to integrate LUA and C++ in the same project and I keep running into roadblock that require more of my code to be re-written in C++.

 

I was wondering if anyone has managed to get C++ and Lua to be able to do things like draw to the screen.

 

From what I can see, everything is either written in all C++ or everything is all written in Lua with C++ just setting up an interpreter.

 

Does anyone have any experience/examples/documentation on the Interpreter class?

[shadmar]

You can still use per entity lua scipts even if you have a c++ project.

[Guppy]

Does anyone have any experience/examples/documentation on the Interpreter class?

 

What would you like to know?

 

Here is an example of pushing data from C++ to lua;

 

http://www.leadwerks.com/werkspace/blog/138/entry-1288-pushing-complex-lua-tables-from-c/

 

If your up to digging through C++ code there is some examples of going in both directions here https://bitbucket.org/guppy42/cppandluatest (be ware this project is semi-retired)

 

Finally the c++ source code for the lua version is in the source folder of any lua project you create - you can take that and replace your app.h/c++ of your c++ project and it will work exactly like the lua project - except for any changes you make

[catch22]

You'll have to be more specific with an example. Are you trying to expose your C++ to lua, or something?

 

Without some specifics, what do you really needs beyond the entity scripts?

[martyj]

Guppy, you're my hero.

 

Any idea how to pass a C++ context to Lua?

 

I'd like to be able to draw in either C++ or Lua.

 

Same with window.

[beo6]

the way you get your context in LUA does not change when you use a C++ project.

 

You should be able to use http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/context/contextgetcurrent-r632 to get your current context and then just draw on it like normal.

 

 

Edit:

And actually you probably don't even need the above since the

Script:PostRender(context) function already provides you with the context.

[Guppy]

Guppy, you're my hero.

 

Any idea how to pass a C++ context to Lua?

 

I'd like to be able to draw in either C++ or Lua.

 

Same with window.

 

As already pointed You dont really want to pass those as getCurrent work in both cases, also passing anything other than simple types is error prone.

 

Window:GetCurrent()

http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/window/windowgetcurrent-r628

 

Context:GetCurrent()

http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/context/contextgetcurrent-r632

 

The bitbucket link has examples of passing data in both directions as well as calling lua functions from C++ and vice versa, but as I said it will require some digging as it's a more or less complete gui

[AggrorJorn]

Not sure if it implies to the topic (quick look).

http://www.leadwerks.com/werkspace/topic/6887-communicating-from-lua-to-c/

[martyj]

I have all my answers. Thank you everyone.