Livecoding Info

gazscratch.md

Livecoding Notes

• Project Information
• Who am I?
• What Am I Doing Today?

What Am I Doing Today (Saturday 5th September 2015 )

• TweakSystem
• Getting the lua interface working

Who Am I?

• TBD

Project Information

• Conversion of TxK for the Vita by Llamasoft to:
  • Linux
  • Android
  • OSX
  • IoS
  • XBOX ONE
• Written in C++
• Game originally written directly for Vita libs
• Abstracted all IO to a bespoke library layer which isn't tied to any HW / OS
• Current version sitting on top of SDL2
• Base renderer OGL
  • Works under GLES2 and OGL 2.0 and greater
• Source code proprietary and not available
• Will likely make abstraction layer public

Tweaks!

• Allows you to register a variable in a database
• You can change that variable via the tweak system
• That all works - currently binding that to my Lua layer

In C++ do something like this

using namespace shitlib::experimental;

// Derive from cTweakable

struct tweaks_t : public cTweakable<tweaks_t> {

    // Declare structure members

    bool mCheatModeActive;
    std::string mString;
    cVec3 mV3;

    // Supply an add function, this registers
    // the elements of the struct you want
    // to be accsible externally

    void adder(maker_t & tw) {
        // Use the function operator overload
        // to add the vars you want externally
        // alterable along with their names
        tw
            ("mCheatModeActive", mCheatModeActive)
            ("mString",          mString)
            ("mV3",              mV3)
            ;
    };
};

// You if you have a cTweakManager object you can then add
// the struct to that manager

tweaks_t tweaks;
tweaks.addTweaks("mytweaks", tweakManager);

tweakManager.setTweak("mytweaks", "mCheatModeActive", true);

It's a lot of work to just set a bool BUT an interface like that allows me to hook it into Lua easily. So..

local tweaks = tweakManger:find("mytweaks")
tweaks.mCheatModeActive = true

It means I'll be able to live edit a lot of game parameters. I have a lua repl built into the game.