Talk:Hackathon Proposal: CompositeViewer and Canvas

From FlightGear wiki
Revision as of 14:53, 16 November 2020 by Hooray (talk | contribs) (performance)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

Performance

FWIW, I don't seem to recall seeing any performance issues back when we were prototyping the original CanvasView element. However, that was obviously not using CompositeViewer (single window/GC). In general slave cameras are cheaper, and at least for static cameras or those fixed to an aircraft (exterior views like tail/gear/FLIR etc), they might still be preferable?

In fact, CompositeViewer is usually needed whenever we have an *independent* entity (where object A may see a completely different part of the scene than object B, so that B may no longer get access to the PagedLOD nodes that A discarded already), but if the camera can be "slaved" to a parent object in the scene, that's probably what should be done? Looking at osgcompositor.cpp, it can combine both kinds of cameras at runtime.--Hooray (talk) 09:53, 16 November 2020 (EST)

Retrieved from "https://wiki.flightgear.org/w/index.php?title=Talk:Hackathon_Proposal:_CompositeViewer_and_Canvas&oldid=129030"