Assertion failure when adding a StaticSprite2D on a extension of Node class

[Edit] Solution: Use a custom LogicComponent instead.

weitjong:

The Node class is not designed to be subclass by user. See also the discussion in http://discourse.urho3d.io/t/alternatives-to-node-subclassing/230612.

Hello folks,

I have this problem when I add a Sprite2D to a StaticSprite2D component created from a custom class that extends Urho3D::Node. I’m using VS 2015 with Urho 1.6. This is my custom class:

NodeExt.h :

#pragma once
#include "stdafx.h"

using namespace Urho3D;

class NodeExt : public Node
{
	URHO3D_OBJECT(NodeExt, Node);

public:
	NodeExt(Context* context);
	virtual ~NodeExt();
};

NodeExt.cpp

#include "NodeExt.h"


NodeExt::NodeExt(Context* context) : Node(context)
{
	RigidBody2D* body = CreateComponent<RigidBody2D>();
	body->SetBodyType(BT_DYNAMIC);
	body->SetGravityScale(0);

	CollisionBox2D* box = CreateComponent<CollisionBox2D>();
	box->SetSize(Vector2(0.32f, 0.32f));
	box->SetDensity(1.0f);
	box->SetFriction(0.5f);
	box->SetRestitution(0.1f);

	ResourceCache* cache = GetSubsystem<ResourceCache>();
	StaticSprite2D* staticSprite = CreateComponent<StaticSprite2D>();
	staticSprite->SetSprite(cache->GetResource<Sprite2D>("Images/ship.png")); // This is where the error happens
}


NodeExt::~NodeExt()
{
}

And the error:

Now, if I comment the line where the SetSprite happens, everything proceeds as usual. And if I use a Urho3D::Node instead my custom class, using the same code, no error happens.

Is there something missing that I should include in my custom class to successfully extend Urho3D::Node?

The Node class is not designed to be subclass by user. See also the discussion in Alternatives to node subclassing?.

1 Like

Oh I see, thanks for your answer.

Should I mark this as solved? I know it technically didn’t get solved but it seems like it’s not possible.