HI Sergey, It's worthwhile thinking about the concepts and how they map to classes.
The View(er) class "is a" View, rather than "has a" View. The Viewer class is special case just for handling a single View and makes it easy as possible to just set up viewer with a single View of a single Scene. Slave Camera's can be used in conjunction with the View(er) in cases where the view is made up of separate windows or rendering effects that all contribute towards provided the view in intended. Think of a car simulator where you have a monitor for the windscreen, and a left and right monitor for the left and right door windows - you'd have three windows that are are controlled by a single master view direction, with each one just offset from this direction, each window maps to a GraphicsWindow. The CompositeViewer is a more complex and more flexible class that "has a" list of View(s). Each View can have it's own unique Scene or share a Scene. Each View can be composed of a single master Camera or from a set of slave Cameras as above. Multiple Views are useful when you have independent views of scene such as 3D view and a map view insert where the scene is the same but the camera that controls the view direction can be moved independantly. Alternatively you can independent Scenes in each View, or mix and match to your hearts content. Robert. On 29 April 2014 21:55, Sergey Bud <[email protected]> wrote: > Hi, All! > > Newbie's question. I am having trouble understanding the concepts of the > subject. Which one contains which one, how they relate to each other. If I > understand correct Viewer contains View and Camera. I am trying to set up > multiple view of the same scene from different points. As I understand I can > have multiple views and multiple cameras, I saw the examples. But I am having > trouble to understand which one I want. I am confused about how those things > work. The book says each View has it's own scene, does it mean I will have > just two duplicate scene's with CompositeViewer? Are multiple Cameras on the > same View is the same as two Views? And in which case it's multiple Graphics > contexts? > > So basically any help on that matter is appreciated. I am trying to > understand the whole concept of Graphics context, View's, Viewports and such. > Any reading on this matter is appreciated as well. > > Thank you! > > Cheers, > Sergey > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=59203#59203 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
