feat(build): Implement scons building

feat(engine): Integrate basic Godot project
feat(test): Demonstrate Godot using extension
feat(dependency): Add OV2-compiler as deps submodule
feat(dependency): Add godot-cpp as a submodule
feat(git): Ignore Godot 4 files
feat(docs): Updated readme with instructions
feat: Can call `TestSingleton.hello_singleton()` from GDScript

Adds basic workflow support but that is currently disabled

1 files changed, 36 insertions, 0 deletions

diff --git a/extension/src/TestSingleton.cpp b/extension/src/TestSingleton.cpp
new file mode 100644
index 0000000..0855a30
--- /dev/null
+++ b/extension/src/TestSingleton.cpp
@@ -0,0 +1,36 @@
+#include "TestSingleton.hpp"
+
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/variant/utility_functions.hpp>
+
+using namespace godot;
+using namespace OpenVic2;
+
+TestSingleton *TestSingleton::singleton = nullptr;
+
+void TestSingleton::_bind_methods()
+{
+	ClassDB::bind_method(D_METHOD("hello_singleton"), &TestSingleton::hello_singleton);
+}
+
+TestSingleton *TestSingleton::get_singleton()
+{
+	return singleton;
+}
+
+TestSingleton::TestSingleton()
+{
+	ERR_FAIL_COND(singleton != nullptr);
+	singleton = this;
+}
+
+TestSingleton::~TestSingleton()
+{
+	ERR_FAIL_COND(singleton != this);
+	singleton = nullptr;
+}
+
+void TestSingleton::hello_singleton()
+{
+	UtilityFunctions::print("Hello GDExtension Singleton!");
+}
\ No newline at end of file