[SOLVED]If you derive a class, how can you add it to the sce

[Anthony]

Well title sais it (almost) all.

Am trying to write my own camera class (derived from ICameraSceneNode, duh) and I am wondering how to add that to the manager.

Not sure yet but it seems that the next snippet won't work.

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cMyCam* camera = (cMyCam*)smgr->addCameraSceneNode( 0, vector3df( 0, 0, 10 ), vector3df( 0, 0, 0 ), -1, true );

Edit: Well am sure now, the implementation won't be executed.

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void cMyCam::setPosition( const vector3df& newpos )
{ 
 s32 i = 1; 
 i++;
}

---- SOLVED ----
This would be the correct way.
Get the root node of the scenemanager and pass that as parent.

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cMyCamera *camera = new cMyCam( smgr->getRootSceneNode(), smgr, -1 );

[serengeor]

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void cMyCam::setPosition( const vector3df& newpos ) 
{ 
 s32 i = 1; 
 i++; 
}

Whoa, what the hell is this supposed to do ?
Neither it uses newpos reference, nor it returns anything.
And the local variable 'i' is not being used.

[Anthony]

Edit: Well am sure now, the implementation won't be executed.

Using breakpoints you will find out if it is executed. i++; would ignore compilers optimization. Just a quick test, if I may.

And yes this is my final code, why use newpos if you have an eye.

thanks for the time anyway.

[Radikalizm]

I find your signature pretty ironic ^^

You have derived your class from the ICameraSceneNode class, this class most probably has a constructor, in that constructor you'll probably need to pass the scene manager

so you just create a new instance of you derived camera class, pass the scene manager and the scene manager will take care of the rest
check the custom scene node tutorial

[Bate]

Instead of implementing a custom CameraSceneNode, you can simply write an Animator.

Derieve your Animator Class from ISceneNodeAnimator and do whatever you want with the camera in OnEvent() and animateNode().

Then add the animator to a camera like this:

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ICameraSceneNode* camera = smgr->addCameraSceneNode();
CMySceneNodeAnimator* animator = new CMySceneNodeAnimator();
camera->addAnimator(animator);
animator->drop();

[hybrid]

You don't need a scene manager function for adding new scene node classes. Just check the constructors of the existing scene nodes. If you pass the root node (i.e. scene manager) and it will be correctly added.

[Anthony]

thanks, will try that tutorial and look at the animator.

In the mean while I found out

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cMyCamera = new cMyCamera( (cMyCamera&)*smgr->addCameraSceneNode( 0, vector3df( 0, 0, 10 ), vector3df( 0, 0, 0 ), -1, false ) );

does work too.

[Radikalizm]

thanks, will try that tutorial and look at the animator.

In the mean while I found out

Code: Select all

cMyCamera = new cMyCamera( (cMyCamera&)*smgr->addCameraSceneNode( 0, vector3df( 0, 0, 10 ), vector3df( 0, 0, 0 ), -1, false ) );

does work too.

That's not the right way to do that...
When you call addCameraSceneNode() you're actually creating a CCameraSceneNode, not your own class
With the prefix you've added you're trying to type-cast the CCameraSceneNode to your own class, which can cause undefined (and unwanted) behaviour

[Anthony]

yes propably some memoryleaking at least. Also it would slow down the engine if it's not occuring within the set up.

This would be the correct way, logical once you know it.

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cMyCamera *camera = new cMyCam( smgr->getRootSceneNode(), smgr, -1 );

Not yet tested though.

Thanks