GDScriptFunctionState in GDNative C++

Zyran65

Hey everyone, I'm currently trying to find out how to work with GDScriptFunctionStates GDNative C++, so I've written the following test code in GDScript:

extends Node

func _ready() -> void:
	print("Starting test.")
	var state = FunctionStateTest.new()
	print("Created test object.")
	var result = state.test(self)
	print(result)


func test_func_1() -> float:
	yield(get_tree().create_timer(0.5), "timeout")
	print("Completed: test_func_1")
	return 1.0


func test_func_2() -> float:
	yield(get_tree().create_timer(2), "timeout")
	print("Completed: test_func_2")
	return 4.0

And the following code in GDNative C++:

 #include "GDScriptFunctionStateTest.h"

using namespace godot;

void godot::FunctionStateTest::_register_methods()
{
	register_method("test", &FunctionStateTest::test);
	register_method("_on_v1_calculated", &FunctionStateTest::_on_v1_calculated);
	register_method("_on_v2_calculated", &FunctionStateTest::_on_v2_calculated);
}

void godot::FunctionStateTest::_init()
{
}

Variant godot::FunctionStateTest::test(Object* test_object)
{
	double value1 = 0.0, value2 = 0.0;
	Variant v1 = test_object->call("test_func_1");
	if (v1.get_type() == Variant::Type::OBJECT && ((Object*)v1)->get_class() == "GDScriptFunctionState") {
		Godot::print(String("V1 Connect to GDScriptFunctionState"));
		Ref<GDScriptFunctionState> result = Ref<GDScriptFunctionState>(GDScriptFunctionState::_new());
		Ref<GDScriptFunctionState> state1 = v1;
		state1->connect(String("completed"), this, String("_on_v1_calculated"), Array::make(Dictionary::make("test_object", test_object), result));
		return result;
	}
	else {
		value1 = v1;
	}
	Variant v2 = test_object->call("test_func_2");
	if (v2.get_type() == Variant::Type::OBJECT && ((Object*)v2)->get_class() == "GDScriptFunctionState") {
		Godot::print(String("V2 Connect to GDScriptFunctionState"));
		Ref<GDScriptFunctionState> result = Ref<GDScriptFunctionState>(GDScriptFunctionState::_new());
		Ref<GDScriptFunctionState> state2 = v2;
		state2->connect("completed", this, "_on_v2_calculated", Array::make(Dictionary::make("test_object", test_object, "value1", value1), result));
		return result;
	}
	else {
		value2 = v2;
	}
	return value1 + value2;
}

void godot::FunctionStateTest::_on_v1_calculated(Variant result, Dictionary parameters, Ref<GDScriptFunctionState> total_result)
{
	Godot::print("completed called");
	Object* test_object = parameters["test_object"];
	double value1 = result, value2 = 0.0;
	Variant v2 = test_object->call("test_func_2");
	if (v2.get_type() == Variant::Type::OBJECT && ((Object*)v2)->get_class() == "GDScriptFunctionState") {
		Godot::print(String("V2 Connect to GDScriptFunctionState"));
		Ref<GDScriptFunctionState> result = Ref<GDScriptFunctionState>(GDScriptFunctionState::_new());
		Ref<GDScriptFunctionState> state2 = Object::cast_to<GDScriptFunctionState>(v2);
		state2->connect("completed", this, "_on_v2_calculated", Array::make(Dictionary::make("test_object", test_object, "value1", value1), result));
	}
	else {
		value2 = v2;
		total_result->emit_signal("completed", value1 + value2);
	}
}

void godot::FunctionStateTest::_on_v2_calculated(Variant result, Dictionary parameters, Ref<GDScriptFunctionState> total_result)
{
	double value1 = parameters["value1"], value2 = result;
	total_result->emit_signal("completed", value1 + value2);
}

However, the method _on_v1_calculated seems to never have been called, as the resulting output is:

Starting test.
Created test object.
V1 Connect to GDScriptFunctionState
Null
Completed: test_func_1

My question is, am I doing something wrong and if so, what, or is it that the GDScriptFunctionState doesn't work in GDNative C++?

riphle

I don’t know if this answer is what you are look for. However when I create a sate Machine I set this.

Var state = default 

Func  process ():
	match state:
		default :
			default_state()
		swing :
			swing_state() 

Func default_state():
	movement functions and what not 


Func swing_state():
	swing functions etc.
	state = default

After the swing state ends it returns the state to the default. I do not know if this is kinda what you were after or if it even helps. Don’t know if it matters for your code that you put down but I did not see any kind of process function. Could it be as simple and putting your code in a process function

TwistedTwigleg

@riphle - I converted the example you gave from using quotes as indents to a code block with tabs so it's easier to read, but if I got anything wrong in the conversion, please let me know and I'll fix it :+1: