use a class of irrlicht and make additions how?

[Mutter]

I want to make additions to the normal SceneNode like a virtual x and y position for game purposes.
i have a struct position with x and y.

Code: Select all

class HQNode: public ISceneNode
{
public:

	position getBrettPosition(void){return pos;}
	void setBrettPosition(int newx, int newy){pos.x = newx; pos.y = newy;}

private:
	position pos;
};
HQNode* test;

if i want to call test->setBrettPosition(1, 1); it causes an error.
can't i make additions this way to classes of irrlicht?

[Saku]

Im pretty sure you can make additons that way. I've personally made an extra camera node like that.

Did you make a 'test = new HQNode();' ?
Also I think you might have to include a constructor and such.

[Mutter]

thx for answer...

i've done this now:

Code: Select all

class HQNode: public ISceneNode
{
public:
	HQNode() {};
	position getBrettPosition(void){return pos;}
	void setBrettPosition(int newx, int newy){pos.x = newx; pos.y = newy;}

private:
	position pos;
};
HQNode* test;

-----------------------
in main():
-----------------------
test = new HQNode();

test->setBrettPosition(1, 2);

compiler gives me 2 errors:
- no suitable standard constructor available...
- Instance of abstract class cannot be built because of
following memers:
"void irr::scene::ISceneNode::render(void)": is abstract
...

i have no clue how to solve this

[hybrid]

If you're implementing an interface (or abstract class as it is called in C++) you have to implement all pure virtual methods. These are methods which are not already implemented in the base class (read the interface class and search all methods with =0 in their declaration). You have tim implement them in your own class or otherwise it is still just an interface which cannot be instantiated. That is a good thing becauise otherwise Irrlicht would try to call render() on your node and wouldn't find a suitable method.
The constructor problem is similar. The interface defines a constructor which has to be used and therefore has to be implemented in your code. Read the API for the parameters to add.

[Saku]

yeah, I had the same experience when making my camera. Basicly you have to copy most members from the "sister classes" - I simply copied the members from the Maya cam and modified the parts needed.

GL HF

[Mutter]

ill try it...

o my o my o my will be some work...lets see

thx