GdScript2All
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Lcbx
Error when compiling CPP methods
I give another try for exploration. Also this time i learned a bit about rules of github.
I wrote player.gd scripted Node. It has a child Camera3D named "PlayerCam"
extends Node3D
var cam : Camera3D
# Called when the node enters the scene tree for the first time.
func _ready() -> void:
cam = get_node("PlayerCam")
cam.current = true
pass # Replace with function body.
# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
pass
#ifndef PLAYER_H
#define PLAYER_H
#include <godot_cpp/godot.hpp>
#include <godot_cpp/variant/array.hpp>
#include <godot_cpp/variant/dictionary.hpp>
#include <godot_cpp/classes/camera3d.hpp>
#include <godot_cpp/classes/node3d.hpp>
using namespace godot;
class player : public Node3D {
GDCLASS(player, Node3D);
public:
protected:
Ref<Camera3D> cam;
// Called when the node enters the scene tree for the first time.
// Called every frame. 'delta' is the elapsed time since the previous frame.
public:
void _ready() override;
void _process(double delta) override;
static void _bind_methods();
};
#endif // PLAYER_H
#include "player.hpp"
#include <godot_cpp/core/object.hpp>
#include <godot_cpp/core/class_db.hpp>
#include <godot_cpp/variant/utility_functions.hpp>
void player::_ready()
{
cam = get_node("PlayerCam");
cam->set_current(true);
// Replace with function body.
}
void player::_process(double delta)
{
}
void player::_bind_methods() {
}
But in terminal i get that error.
src/player.cpp: In member function 'virtual void player::_ready()':
src/player.cpp:10:23: error: no matching function for call to 'player::get_node(const char [10])'
10 | cam = get_node("PlayerCam");
| ~~~~~~~~^~~~~~~~~~~~~
In file included from godot-cpp/gen/include/godot_cpp/classes/node3d.hpp:38,
from godot-cpp/gen/include/godot_cpp/classes/camera3d.hpp:36,
from src/player.hpp:8,
from src/player.cpp:2:
godot-cpp/gen/include/godot_cpp/classes/node.hpp:349:12: note: candidate: 'template<class T> T* godot::Node::get_node(const godot::NodePath&) const'
349 | T *get_node(const NodePath &p_path) const { return Object::cast_to<T>(get_node_internal(p_path)); }
| ^~~~~~~~
godot-cpp/gen/include/godot_cpp/classes/node.hpp:349:12: note: template argument deduction/substitution failed:
src/player.cpp:10:23: note: couldn't deduce template parameter 'T'
10 | cam = get_node("PlayerCam");
| ~~~~~~~~^~~~~~~~~~~~~
In file included from godot-cpp/gen/include/godot_cpp/classes/node.hpp:41,
from src/example.hpp:8,
from src/register_types.cpp:5:
godot-cpp/include/godot_cpp/classes/ref.hpp: In instantiation of 'void godot::Ref<T>::unref() [with T = godot::Camera3D]':
godot-cpp/include/godot_cpp/classes/ref.hpp:217:3: required from 'godot::Ref<T>::~Ref() [with T = godot::Camera3D]'
217 | unref();
| ^~~~~
src/player.hpp:13:7: required from here
13 | class player : public Node3D {
| ^~~~~~
godot-cpp/include/godot_cpp/classes/ref.hpp:204:45: error: 'class godot::Camera3D' has no member named 'unreference'
204 | if (reference && reference->unreference()) {
| ~~~~~~~~~~~^~~~~~~~~~~
In file included from godot-cpp/gen/include/godot_cpp/classes/node.hpp:41:
godot-cpp/include/godot_cpp/classes/ref.hpp: In instantiation of 'void godot::Ref<T>::unref() [with T = godot::Camera3D]':
godot-cpp/include/godot_cpp/classes/ref.hpp:217:3: required from 'godot::Ref<T>::~Ref() [with T = godot::Camera3D]'
217 | unref();
| ^~~~~
src/player.hpp:13:7: required from here
13 | class player : public Node3D {
| ^~~~~~
godot-cpp/include/godot_cpp/classes/ref.hpp:204:45: error: 'class godot::Camera3D' has no member named 'unreference'
204 | if (reference && reference->unreference()) {
| ~~~~~~~~~~~^~~~~~~~~~~
I thought like maybe its because of get_node because that can be complicated due to path string value so modifying it to creating a new Camera3D object but still i got error.
#include "player.hpp"
#include <godot_cpp/core/object.hpp>
#include <godot_cpp/core/class_db.hpp>
#include <godot_cpp/variant/utility_functions.hpp>
void player::_ready()
{
cam = Camera3D->new();
cam->set_current(true);
this->add_child(cam);
// Replace with function body.
}
void player::_process(double delta)
{
}
void player::_bind_methods() {
}
src/player.cpp: In member function 'virtual void player::_ready()':
src/player.cpp:10:23: error: expected primary-expression before '->' token
10 | cam = Camera3D->new();
| ^~
src/player.cpp:10:25: error: expected unqualified-id before 'new'
10 | cam = Camera3D->new();
| ^~~
src/player.cpp:12:25: error: cannot convert 'godot::Ref<godot::Camera3D>' to 'godot::Node*'
12 | this->add_child(cam);
| ^~~
| |
| godot::Ref<godot::Camera3D>
In file included from godot-cpp/gen/include/godot_cpp/classes/node3d.hpp:38,
from godot-cpp/gen/include/godot_cpp/classes/camera3d.hpp:36,
from src/player.hpp:8,
from src/player.cpp:2:
godot-cpp/gen/include/godot_cpp/classes/node.hpp:158:30: note: initializing argument 1 of 'void godot::Node::add_child(godot::Node*, bool, InternalMode)'
158 | void add_child(Node *p_node, bool p_force_readable_name = false, Node::InternalMode p_internal = (Node::InternalMode)0);
| ~~~~~~^~~~~~
In file included from godot-cpp/gen/include/godot_cpp/classes/node.hpp:41:
godot-cpp/include/godot_cpp/classes/ref.hpp: In instantiation of 'void godot::Ref<T>::unref() [with T = godot::Camera3D]':
godot-cpp/include/godot_cpp/classes/ref.hpp:217:3: required from 'godot::Ref<T>::~Ref() [with T = godot::Camera3D]'
217 | unref();
| ^~~~~
src/player.hpp:13:7: required from here
13 | class player : public Node3D {
| ^~~~~~
godot-cpp/include/godot_cpp/classes/ref.hpp:204:45: error: 'class godot::Camera3D' has no member named 'unreference'
204 | if (reference && reference->unreference()) {
| ~~~~~~~~~~~^~~~~~~~~~~
In file included from godot-cpp/gen/include/godot_cpp/classes/node.hpp:41,
from src/example.hpp:8,
from src/register_types.cpp:5:
godot-cpp/include/godot_cpp/classes/ref.hpp: In instantiation of 'void godot::Ref<T>::unref() [with T = godot::Camera3D]':
godot-cpp/include/godot_cpp/classes/ref.hpp:217:3: required from 'godot::Ref<T>::~Ref() [with T = godot::Camera3D]'
217 | unref();
| ^~~~~
src/player.hpp:13:7: required from here
13 | class player : public Node3D {
| ^~~~~~
godot-cpp/include/godot_cpp/classes/ref.hpp:204:45: error: 'class godot::Camera3D' has no member named 'unreference'
204 | if (reference && reference->unreference()) {
| ~~~~~~~~~~~^~~~~~~~~~~
scons: *** [src/player.os] Error 1
It feels like i am missing a basic simple step that is because i am pretty noob in c++..
For the first error I think it should be get_node<Camera3D>(), the compiler says it can't find the template type (called 'T' in godot source code)
The second is because c++ creates new objects with the syntax new Camera3D()
I'll see if I can make the generate c++ take care of those nuances automagically
closing, the get_node not having the type argument is a bit too complex to put in the transpiler, and the 'new' keyword would have to be handled by hand in cpp no matter what I think