Hi Vic,
I'm making a game/simulation-engine as a learning project and I want it to be able to
display windows of different sizes. For example when it starts you get a menu in a small
window and when you click "start" in the menu another window open up in full
screen in which you can navigate around the 'game world' and when you exit that you get
back to the small window with the menu.
OK, that clarifies your usage. Thanks for the explanation.
I have tested using only the viewer but it does not seem to give me much control
over the window. Using viewer->setUpViewInWindow(x, y, w, h) a window appears
but how can I remove the frame around it if I want to have a custom GUI including
minimize and close buttons inside it instead?
The way to do that would be to create a graphics context using
osg::GraphicsContext::createGraphicsContext(traits);
You set up the osg::GraphicsContext::Traits structure to fit what you
want your window to look like. For example:
osg::ref_ptr<osg::GraphicsContext::Traits> traits =
new osg::GraphicsContext::Traits;
traits->x = 0; // In screen space, so it's the top-left corner
traits->y = 0;
traits->width = width;
traits->height = height;
traits->windowDecoration = false; // Removes the window's border
osg::GraphicsContext* gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
See the osg::GraphicsContext::Traits class for the list of the
parameters you can change.
http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a00279.html
http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a00275.html
To set the screen's fullscreen resolution, you can't just set your
traits structure, because that just specifies the size of the graphics
context. So if for example you create a 1024x768 context, without window
decoration, but your Windows screen resolution is 1280x1024, you'll just
see a borderless window that takes up part of your screen - the screen's
resolution won't change to fit it. For that, you need to go through the
WindowingSystemInterface which you get by calling
osg::GraphicsContext::getWindowingSystemInterface();
and then calling setScreenResolution() on that. Remember to save the
previous screen resolution at startup and re-set it before exiting.
http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a00280.html
Using these interfaces, you can keep your code 100% portable since OSG
will automatically choose the right GraphicsWindow* subclass for you
(Win32 on Win32, X11 on Linux, Carbon on MacOS X) through the static
createGraphicsContext() and getWindowingSystemInterface() calls.
In your case, according to your explanation above, I expect you'd want
to create a first graphics context for your menu system, do what you
need there, then when the game starts you'd destroy it and create a new
graphics context for the game.
Hope this helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay [email protected]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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