Getting garbage values when using get_node

UnknownUser

Hi all, I've been stuck in this for a couple of days now and I'm not sure what the issue is. I've been following this tutorial:

Which shows how to attach enemy stats and send a signal back to the enemy when there's no health and queue_free the enemy using GDScript. I'm trying to do it in GDNative though.

I'm not sure if I'm getting the stats node correctly, because everytime I get it and use it I get garbage values for their members. I added the Stats as a child Node of Bat Same with the SwordHitbox class, when I get it from the on_Hurtbox_area_entered though the Area2D* parameter, its damage member variable value is also a garbage value. When I instantiate the Stats class myself there are no garbage values, not sure what I have to do to the get_node("Stats) to stop the garbage values. The signal is working though when the garbage value health becomes <= 0 though and the bat disappears.

Here are the Stats, SwordHitbox and Bat code:

Thank you for your help!

UnknownUser

GDNative is c++. Interesting... I had no idea you could use that. It would execute 100x faster than GDScript, in theory. The behavior you're describing would lead me to believe that the Stats aren't initializing before you attempt to use them.

int sword_dmg=2;

A declaration like the above will allocate memory for the variable "sword_dmg" and set the value to "2".

int sword_dmg;

A declaration like the above will allocate memory for the variable "sword_dmg" and it will be set to whatever the value happened to have been before the program claimed that memory as it's own. So... if the prior value for the 2 bytes had hexadecimal values of "4F" and "FA"... well... congrats man, you've got garbage for your sword_dmg. No worries... with that much damage, the sword will kill anything it hits. : P

More to the point, in "Bat::on_Hurtbox_area_entered":

SwordHitbox *swordHitBox = (SwordHitbox*) area;

Can be changed to:

SwordHitbox *swordHitBox = (SwordHitbox*) area;
area->_init();

I think you'll also need to do the same thing with "Stats".

Put "print" lines in all of your "_init" methods to see if they're even running.

I don't know if this'll solve your problem. But it may be a good place to start?

UnknownUser

Hi GreyWolf117, thanks a lot for looking into it! I just figured out the issue and it seems the issue was the static casting (SwordHitbox*) area and other static casts. We have to use the godot namespace Object::cast_to method to properly cast Godot objects. Thank you again for helping me out!

UnknownUser

No problem. Scope is a complicated beast in c++. If you manage to figure out how to make a full game in GDNative... you'll have just about the maximum amount of power that you'd need at your fingertips.