lua tets

src/main.cpp

@@ -1,18 +1,68 @@
-#include <chrono>
+// #include <chrono>
-#include <td/display/state/MainMenuState.h>
+// #include <td/display/state/MainMenuState.h>
-#include <td/misc/Time.h>
+// #include <td/misc/Time.h>
+
+#define SOL_ALL_SAFETIES_ON 1
+#include <sol/sol.hpp>
+
+void some_function() {
+	std::cout << "some function!" << std::endl;
+}
+
+void some_other_function() {
+	std::cout << "some other function!" << std::endl;
+}
+
+struct some_class {
+	int variable = 30;
+
+	double member_function() {
+		return 24.5;
+	}
+};
 
 int main(int argc, char** argv) {
 	// init GL context
-	td::Display display(1920, 1080, "Tower-Defense 2");
+	// td::Display display(1920, 1080, "Tower-Defense 2");
 
-	display.ChangeState<td::MainMenuState>();
+	// display.ChangeState<td::MainMenuState>();
 
-	td::Timer timer;
+	// td::Timer timer;
-	while (!display.IsCloseRequested()) {
+	// while (!display.IsCloseRequested()) {
-		display.PollEvents();
+	// 	display.PollEvents();
-		display.Update(timer.GetDelta());
+	// 	display.Update(timer.GetDelta());
-	}
+	// }
+
+	std::cout << "=== functions (all) ===" << std::endl;
+	
+	sol::state lua;
+	lua.open_libraries(sol::lib::base);
+
+	// put an instance of "some_class" into lua
+	// (we'll go into more detail about this later
+	// just know here that it works and is
+	// put into lua as a userdata
+	lua.set("sc", some_class());
+
+	// binds a plain function
+	lua["f1"] = some_function;
+	lua.set_function("f2", &some_other_function);
+
+	// binds just the member function
+	lua["m1"] = &some_class::member_function;
+
+	// binds the class to the type
+	lua.set_function("m2", &some_class::member_function, some_class{});
+
+	// binds just the member variable as a function
+	lua["v1"] = &some_class::variable;
+
+	// binds class with member variable as function
+	lua.set_function("v2", &some_class::variable, some_class{});
+
+	lua.script_file("test/main.lua");
+
+	std::cout << std::endl;
 
 	return 0;
 }

test/main.lua

@@ -0,0 +1,24 @@
+f1() -- some function!
+f2() -- some other function!
+
+-- need class instance if you don't bind it with the function
+print(m1(sc)) -- 24.5
+-- does not need class instance: was bound to lua with one 
+print(m2()) -- 24.5
+
+-- need class instance if you 
+-- don't bind it with the function
+print(v1(sc)) -- 30
+-- does not need class instance: 
+-- it was bound with one 
+print(v2()) -- 30
+
+-- can set, still 
+-- requires instance
+v1(sc, 212)
+-- can set, does not need 
+-- class instance: was bound with one 
+v2(254)
+
+print(v1(sc)) -- 212
+print(v2()) -- 254

xmake.lua

@@ -3,7 +3,7 @@ add_rules("mode.debug", "mode.release")
 add_repositories("persson-repo https://git.ale-pri.com/Persson-dev/xmake-repo.git")
 
 add_requires("imgui 1.92.0", {configs = {sdl3 = true, opengl3 = true}})
-add_requires("libsdl3 3.2.16", "splib 2.3.2", "zlib", "glew", "fpm", "enet6")
+add_requires("libsdl3 3.2.16", "splib 2.3.2", "zlib", "glew", "fpm", "enet6", "sol2")
 
 set_languages("c++20")
 
@@ -21,7 +21,7 @@ target("Tower-Defense2")
     add_includedirs("include", {public = true})
     set_kind("binary")
     add_files("src/**.cpp")
-    add_packages("libsdl3", "imgui", "glew", "splib", "zlib", "fpm", "enet6", {public = true})
+    add_packages("libsdl3", "imgui", "glew", "splib", "zlib", "fpm", "enet6", "sol2", {public = true})
     set_rundir(".")
     add_defines("TD_GL_LOADER_GLEW")