David Megginson wrote: > Andy Ross writes: > > That's exactly the idea. You take a "plane of instruments" (what > > we're currently calling a panel XML file) and project it into 3D > > space via specifying corners. It draws on top of the existing > > stuff, with no problems whatsoever. If you want to have only one > > instrument per panel, that works fine. Most (well, all) cockpits, > > though, have a bunch of flat boards with instruments mounted on > > them. Call each one of those a "panel" and we're done. All the > > work carries over automatically. > > > > The only code changes required are to allow the corner vertices to > > be specified in the configuration (/sim/panels[n]/bottom-left/x-m, > > etc...), and allow more than one panel to be created at once. > > Maybe there's a need for a "cockpit" xml file to unify some of > > this. > > I don't look at raw OpenGL all that often -- I guess I'll have to do > a bit of trig to figure out the transformation, given the corners. > If you have even the slightest inclination to try this yourself, > please be my guest.
You miss the point. The code already *does* figure out the transformation given the corners. :) The only thing you have to do is fill in the corner coordinates to match the numbers you're already generating in the model file. It can be as simple as drawing a named quad to represent the panel in the cockpit model, grabbing the coordinates from that manually and typing them into the XML, or as complicated as providing the XML with the symbolic name of the quad and having the panel work it out. But really, there's no math or rendering code required -- you just have to fill in values for the "a", "b" and "c" vectors in the panel code. (Well, there's an axis swap involved -- these values are in OpenGL screen coordinates, not model orientation, so X is left, Y up and Z backwards). I'd do this myself, but I'm clueless about cockpit authoring. What you have right now is as close as I could come without actually doing cockpit design. :) Andy -- Andrew J. Ross NextBus Information Systems Senior Software Engineer Emeryville, CA [EMAIL PROTECTED] http://www.nextbus.com "Men go crazy in conflagrations. They only get better one by one." - Sting (misquoted) _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
