greg_nhi1 wrote:
> Hi,
>
> Our application (Windows x64) writes to a memory buffer rather than a window.
> The app using OSG runs as a hidden console app and streams the rendered
> images via named pipe to a client app. (Even if we weren't using a separate
> process for OSG we need to render using PIXEL_BUFFER since our app is WPF and
> doesn't provide a usable window handle.)
>
> When I resize the display window I send a message to my processor so it can
> resize the OSG components. However, I cannot find a way to do this that
> works. I get the following results by trying different methods.
>
> I've searched the sample code and forums and can't find anything (other than
> the methods I have tried based on sample code). Any help would be
> appreciated.
>
>
> For reference (I'm using an earth image to check proportions and coordinates
> - I get the same results using models):
>
> The last image (SmallEarthEventQueue) was generated using this source code to
> resize.
>
> double eventTime = m_nhiViewer->getEventQueue()->getTime();
> m_nhiViewer->getEventQueue()->windowResize(0, 0,
> m_width, m_height, eventTime);
>
>
> The next up (SmallEarth-NoProjChange) was generated using this source code to
> resize.
>
> gc->resized(0, 0, m_width, m_height);
>
> camera->resize(m_width, m_height, osg::Camera::ResizeMask::RESIZE_ATTACHMENTS
> | osg::Camera::ResizeMask::RESIZE_VIEWPORT);
>
>
> The next up (SmallEarth-ProjChange) was generated using this source code.
>
> osg::Camera * camera = m_nhiViewer->getCamera();
> if (camera != nullptr)
> {
> osg::ref_ptr<osg::GraphicsContext> gc = camera->getGraphicsContext();
> if (gc != nullptr)
> {
> osg::Matrixd origCamProjMatrix = camera->getProjectionMatrix();
>
> gc->resized(0, 0, m_width, m_height);
>
> double widthChangeRatio = double(m_width) / double(m_lastWidth);
> double heightChangeRatio = double(m_height) /
> double(m_lastHeight);
> double aspectRatioChange = widthChangeRatio / heightChangeRatio;
>
> if (aspectRatioChange != 1.0)
> {
> switch (camera->getProjectionResizePolicy())
> {
> case(osg::Camera::HORIZONTAL) :
> case(osg::Camera::VERTICAL) :
> origCamProjMatrix *= osg::Matrix::scale(1.0 /
> aspectRatioChange, 1.0 / aspectRatioChange, 1.0);
> origCamProjMatrix *=
> osg::Matrix::translate(-(1.0 - widthChangeRatio), -(1.0 - heightChangeRatio),
> 0.0);
> break;
>
> default:
> break;
> }
> }
>
> camera->resize(m_width, m_height,
> osg::Camera::ResizeMask::RESIZE_ATTACHMENTS |
> osg::Camera::ResizeMask::RESIZE_VIEWPORT);
>
> camera->setProjectionMatrix(origCamProjMatrix);
> }
> }
>
>
>
> ...
>
> Thank you!
>
> Cheers,
> Greg
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=66225#66225
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