Ron Jensen wrote: > Sent: 20 April 2008 21:30 > On Sun, 2008-04-20 at 12:55 -0700, Stuart Buchanan wrote: > > Hi All, > > > > Enthused by a comment on the forum by snork > > (http://www.flightgear.org/forums/viewtopic.php?t=1333), I've been > > working on an extension to the generic blackout/redout script which > > attempts to simulate the feeling of compression due to g-forces, by > > moving the pilot viewpoint vertically depending on the apparent > > g-force. > > > > This is a simplified version of what vivian, Josh et al. > created for > > the Buccaneer and other aircraft. > > > > Of course, the main advantage of this is that it is completely > > generic, and pretty lightweight too. The overhead ontop of the > > redout/blackout is minimal: one extra property read/write > per frame, > > only when the feature is enabled and in cockpit view. > > > > A patch for this is available from > > http://www.nanjika.co.uk/flightgear/headshake.patch > > > > Comments are very welcome, but I'm particularly interested > in peoples > > views on the following: > > > > 1) Obviously this duplicates some aircraft-specific code, > and one can > > argue that this sort of feature is only important for high-energy > > jets, where it should be modelled in more detail than I have done. > > I've been playing with this code on the Stampe, A4-F and Pitts, and > > have felt that it has improved the feeling of realism, but then I > > wrote it ;) Do people feel it is worth providing a generic > > implementation, given that for most GA flying is at 2g or less, and > > this will move the pilot viewpoint 5cm! > > It is worthwhile to model generically. Many aircraft in CVS > could benefit from this feature without having to recode it for each. > > > 2) Currently the redout and headshake enabling properties are > > userarchive, which (as I understand it) means that the user's > > preference will over-write any aircraft setting. Given that > both these > > generic features duplicate existing aircraft-specific code, > I think I > > should remove this flag, so aircraft designers can > over-ride it. Any > > comments? > > STRONGLY OPPOSE. User preference should absolutely outweigh > the aircraft designer. While I might feel, as an aircraft > designer, that a function adds a degree of realism, I can't > and don't test on different hardware, monitor resolutions, > multi-head setups, hardware simulator setups, etc. which > head-shake may cause problems with. > > I personally find it annoying to have the panels jumping > around during IFR flight.
Are we talking about the same utility? Headshake as implemented is a comparatively small effect, which is only visible at moderate to high G loadings - you should never see it in IFR flight (unless you have been trying aerobatics in IFR). I can antcipate no interaction with different hardware, monitor resolutions, or multi-head setups, although it does need to be disabled for hardware simulator setups. And unless you are seeing a bug, the movement is gradual and only jumps around in the event of very high G loadings - in a crash for example. Did you mean dynamic view? > > > 3) At the moment, this feature is limited to the y-offset > of the pilot > > viewpoint. For non-military aircraft, the most significant > g-forces > > will be felt in the y-axis (in the pilots frame of > reference), as they > > cannot yaw fast enough to cause any in the x-axis, and they > don't have > > enough power to cause any in the z-axis. If it is worth providing a > > generic feature, is it worth making it multi-dimensional? > > It may be worth while to add. Perhaps it could be used to > give a sense of slip/skid for the GA pilot. > Vivian ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
