[osg-users] some problem about hud and window size

[Trajce Nikolov NICK]

hi,

you can do an UpdateCallback for your ortho camera that will set the proper
dimensions based on the Viewport

something like this:
struct UpdateOrthoCameraCallback : public osg::NodeCallback
{
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
{
osg::Camera* camera = dynamic_cast<osg::Camera*>(node);
if (camera)
{
osg::Viewport* vp = camera->getViewport();
camera->setProjectionMatrix(osg::Matrixd::ortho2D(0, vp->width(), 0,
vp->height()));
}
}
};
myOrthoCamera->setUpdateCallback(new UpdateOrthoCameraCallback);

On Tue, May 3, 2016 at 11:35 AM, John Lee <357059570 at qq.com> wrote:

> Hi,
>
> First, I drew some tags dynamically using HUD camera on the render window
> size which is 1100X679, but when I change the length-width ratio of the
> render window size, the tags positions changed and it was wrong.
> Can anyone tell me how can i solve this problem.
>
> Thank you!
>
> Cheers,
> Lee
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=67044#67044
>
>
>
>
> Attachments:
> http://forum.openscenegraph.org//files/2_198.png
> http://forum.openscenegraph.org//files/1_180.png
>
>
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-- 
trajce nikolov nick
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