With a basic sandbox application out of the way, we're going to create the basic Lua script that sets up the sandbox. First, create a new Sandbox.lua script within the script folder:

Create the Lua file as follows:

src/my_sandbox/script/Sandbox.lua

A sandbox Lua script must implement four global functions that the C++ code will call, and they are Sandbox_Cleanup, Sandbox_HandleEvent, Sandbox_Initialize, and Sandbox_Update:

Sandbox.lua:

function Sandbox_Cleanup(sandbox)
end

function Sandbox_HandleEvent(sandbox, event)
end

function Sandbox_Initialize(sandbox)
end

function Sandbox_Update(sandbox, deltaTimeInMillis)
end

With the basic hooks in place, modify your SandboxApplication class to create a sandbox based on your Lua script:

MySandbox.cpp:

void MySandbox::Initialize() {
    SandboxApplication::Initialize();

    ...
    CreateSandbox("Sandbox.lua");
}