[osg-users] Scaling visitor not working as expected

[Christian Buchner]

I just checked a recent osg::Drawable header file and it seems
dirtyDisplayList() is deprecated
and has been replaced with dirtyGLObjects(). Relevant snippet follows:

#ifdef OSG_USE_DEPRECATED_API
/** Deprecated, use dirtyGLObjects() instead. */
inline void dirtyDisplayList()
{
dirtyGLObjects();
}
#endif

/** Force a recompile on next draw() of any OpenGL objects associated with
this geoset.*/
virtual void dirtyGLObjects();


2018-01-09 17:57 GMT+01:00 Christian Buchner <christian.buchner at gmail.com>:

>
> Are display lists active in your scene? if so, maybe a dirtyDisplayList()
> call might be required
> on the affected drawables.
>
> drawable->dirtyDisplayList()
>
> As far as I know display lists are still the default in OSG, unless you
> explicitly disable them on
> geometry objects (and possibly enable vertex buffer objects instead, for
> performance reasons)
>
> the corresponding API calls on drawables would be
>
> drawable->setUseDisplayList( false )
> drawable->setUseVertexBufferObjects( true )
>
> you could use a visitor right after loading the scene to switch off
> display lists and enabling
> vertex buffer objects instead.
>
> Christian
>
>
> 2018-01-09 14:58 GMT+01:00 Werner Modenbach <Werner.Modenbach at texion.eu>:
>
>> Hi all,
>>
>> I'm loading 3ds scenes as subnodes into my scene. The 3ds coordinates are
>> in a different scale than my scene.
>> Usually I would solve this by a transform. But because of internal
>> reasons I need the vertices being
>> in MY coordinate measure.
>> So I wrote a scaling visitor, that multiplies al vertices of geometries
>> by a given factor.
>> That works perfectly fine when loading the 3ds scene:
>> *        osg::ref_ptr<osg::Node**>* *node* *=* *osgDB*
>> *::readRefNodeFile(**path**); *
>> *        ScaleVisitor* *sv(**initialObjectScale* ***
>> *correctiveObjectScale**); *
>>         *node->**accept**(sv); *
>>         *addChild**(node); *
>>
>> Unfortunately when rescaling the object after being added as a child this
>> doesn't work any more:
>> *        osg::ref_ptr<osg::Node> node* *=* *getChild(0);*
>> *        ScaleVisitor* *sv(scaleChange);*
>>         *node->accept(sv);*
>>
>> The 3ds scene doesn't change size on my screen.
>> The visitor calls:
>>         vertices->dirty();
>>         geom.dirtyBound();
>>
>> But nothing happens. What am I missing? Deleting the 3ds scene and
>> recreating it from scratch works OK but is very inefficient.
>>
>> Thanks for any hint.
>>
>> - Werner -
>>
>> _______________________________________________
>> osg-users mailing list
>> osg-users at lists.openscenegraph.org
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>>
>
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