Do you use text->setAutoRotateToScreen(true)?
On Tue, Jan 13, 2009 at 1:36 PM, Vincent Bourdier
<vincent.bourd...@gmail.com> wrote:
> Hi,
>
> I've tried what you propose : put the rotated text on a separate geode (and
> not the billboard) ... The result is the same : text do not update
> correctly.
>
> I don't know what to change... I've tried to set the rotation before the
> translation, whatever be the order of the instructions : is the
> setRotation() is called, the text do not update with good proportions...
>
> Any suggestion ?
>
> Thanks,
>
> Regards,
> Vincent.
>
> 2009/1/13 Vincent Bourdier <vincent.bourd...@gmail.com>
>>
>> Hi Robert,
>>
>> I did it from the past for a simple OSG text on a billboard node,
>> without constant screen pixel size management and it works well.
>>
>> I'll try to get the text out from the billboard, hoping this won't
>> be so difficult to obtain the same result...
>>
>> Thanks for this explanation.
>>
>> Regards,
>> Vincent.
>>
>> 2009/1/13 Robert Osfield <robert.osfi...@gmail.com>
>>>
>>> Hi Vincent,
>>>
>>> I've never used osgText in conjunction with osg::Billboard before. I
>>> can image the mix of on the fly compute matrices might cause problems.
>>> osgText has support for billboard behaviour so I'd recommend not
>>> adding the text to the billboard, instead just add it as sibling to
>>> the Billboard and enable the rotate to screen option on the text
>>> object.
>>>
>>> Robert.
>>>
>>> On Tue, Jan 13, 2009 at 11:59 AM, Vincent Bourdier
>>> <vincent.bourd...@gmail.com> wrote:
>>> > Hi,
>>> >
>>> > Currently making my billboard node, I add an osgText on it. I need this
>>> > text
>>> > to be in node's coordinate, but in constant pixel size on screen.
>>> > When the billboard move or rotate, the text will follow it. The only
>>> > thing
>>> > the text can change is caracter size.
>>> >
>>> > I use this code :
>>> >
>>> > osg::ref_ptr<osgText::Text> d = new osgText::Text;
>>> >
>>> > d->setRotation(osg::Quat(-osg::PI_2, osg::Vec3f(1,0,0)) *
>>> > osg::Quat(-osg::PI_2, osg::Vec3f(0,1,0)));
>>> >
>>> > d->setPosition(decal*0.7);//to avoid collision between object and
>>> > osgText
>>> >
>>> > d->setText("Test");
>>> > d->setAxisAlignment(osgText::Text::USER_DEFINED_ROTATION);
>>> > d->setAutoRotateToScreen(false);
>>> > d->setCharacterSizeMode(osgText::Text::SCREEN_COORDS);
>>> > d->setCharacterSize(30);
>>> > d->setAlignment(osgText::Text::CENTER_TOP);
>>> > // d->setDrawMode(1);
>>> >
>>> > billboard->addDrawable(d.get());
>>> >
>>> > But the setRotation is making something bad.
>>> >
>>> > Without the setRotation line node, everything is good for text size.
>>> > Rotation is bad but it is something expected.
>>> > So I apply a rotation on it, to obtain the text with the good
>>> > orientation
>>> > relative to the billboard. After that, the text rotation is good, but
>>> > when
>>> > the camera is aproaching, the text size do not update correctly : only
>>> > the
>>> > width stay constant in pixel size... the hight stay constant in
>>> > billboard
>>> > coordinates size. So the text is deformed, depending on camera distance
>>> > from
>>> > it..
>>> >
>>> > The question is : how to rotate the text without having this bad effect
>>> > ?
>>> >
>>> > Thanks.
>>> >
>>> > Regards,
>>> > Vincent.
>>> >
>>> > _______________________________________________
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>>> > osg-users@lists.openscenegraph.org
>>> >
>>> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>> >
>>> >
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>>
>
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