On 01/10/2009 09:13 AM, Csaba Halász wrote: > #2 0x000000000080188d in FGNavRadio::update (this=0x98df490, > dt=0.058333333333333334) at src/Instrumentation/navradio.cxx:613 > 613 double angle = asin( y / x ) * SGD_RADIANS_TO_DEGREES; > (gdb) p x > $1 = 3.2580450943147174 > (gdb) p y > $2 = 3.258443598627875 > (gdb) p y / x > $3 = 1.0001223139341602 > > No idea what it is calculating and how to fix. (apart from forcibly > clamping y/x to [-1, 1] ...)
It's calculating your angle of elevation relative to the glideslope antenna. The code would be correct except for roundoff error. To provoke this bug you need to sit directly above the GS transmitter, vertically within a few thousandths of a degree, and then get unlucky w.r.t roundoff. Clamping it is guaranteed 100% safe and effective. ------------------------------------------------------------------------------ Check out the new SourceForge.net Marketplace. It is the best place to buy or sell services for just about anything Open Source. http://p.sf.net/sfu/Xq1LFB _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
