On 3 Jan 2009, at 17:38, John Denker wrote: > > A) We are now agreed that deflection as a fraction > of full scale is a supported feature, not deprecated, > not scheduled to "rot", right?
Err, I would say that we don't have that as a current feature, but I think that's getting into semantics of what 'normalised' means, and my opinion as a graphics coder may be different to an engineering meaning. Anyway, there is certainly no way (even if it was desired) of getting rid of heading-deflection or gs-deflection, and they have to continue to work. > B) The proposal is to add a new output, just like > the old output, but with a different normalization > factor. That's the main point of this thread, right? At this point, I think so. There's code that would be simpler if it could talk about degrees deviation rather than peg-to-peg percentage (eg, all the autopilots that 'capture with 0.5 degrees (or whatever)' of the localiser) but I think a degree based definition will always be troublesome. Clearly real world autopilots know about a signal from the navradio, not real degrees, so when the manual specifies a value in degrees they're applying some approximate conversion factor. > C) The old oddly-normalized output will continue to > be supported for the foreseeable future, since is doesn't > interfere with new features and preserves compatible > interoperation with older CDIs, right? Yep, sadly that's too far baked in to be removed at this point, at least for the amount of effort required. > D) Lesser points include: > > -- Outputs should not be clamped by the tuner. Each > CDI head may choose to peg the needles, or not, in > its own way. Yep, but someone needs to verify what the fallout of such a change might be. > -- Localizer sensitivity is runway-dependent. > > -- Dozens of other navradio.cxx bugs as discussed > elsewhere. Indeed, but again not the core thing I'm worrying about here. James ------------------------------------------------------------------------------ _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
