HI Harash,
The lastest dev versions (SVN and 1.9.x series) of the OSG have support for
multiple views onto one or more scenes, this is supported by the
osgViewer::CompositeViewer class. To use this you'll create a
osgViewer::View for each view you have and this to the CompostiteViewer
object (you'll maintain one per app).
For each View you'll probably just have one master Camera, and to this you
need to attach what it'll be rendering to - a
GraphicsContext/GraphicsWindow. To attach a GraphicsWindow you'll need to
create it, and in your case most likely attaching it to a pre-existing MFC
window, this is possible by the inheritedWindowData filed in
osg::GraphicsContext::Triats structure used to describe the window you want
to create.
This is a lot to take in, so take it bit by bit, first up familiarise
yourself with the osgcamera and osgmultiplecamera examples, the later uses
CompositeViewer.
I wouldn't recommend looking too long at OSGMFC as this is very old now,
long before the new osgViewer library included with the OSG.
Robert.
On 5/4/07, Harash Sharma <[EMAIL PROTECTED]> wrote:
Hi Robert,
I have started using OSG the previous month. It is fantastic. But I
have a lot of queries which I intend to clear through you. I am using
VS-2005. My application uses the standard Document - View Architecture
provided by MFC. The application is of Multiple Document Interface type. The
software is supposed to load a scene graph database and use multiple views
to render this scene with each view attached to a different camera position.
I downloaded the recommended OSGMFC sample application for the purpose of
learning the mechanism to do so. Now my doubts:
1. The osgDB reads the file in the view class, which means that each time
I open a new window, the database is reloaded. Is it true that due to
maintainence of multiple copies of the scene, the memory consumption
increases?
2. Next I tried to move the reference pointer to the scene node to the
document class and read the scene database once and for all in the Document
class. The program works fine as long as only one view window is opened. The
moment we open another window, the whole texture disappears. Why does this
happen? What is the best way to achieve what I am doing with high efficiency
and minimum memory utilisation.
Regards
Harash
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