Conditionals in .fmt files

[samk]

Hello,

Is it possible to add values to conditionals in the print format files?

I am trying to check if GPS telemetry is not zeroed out (from a video file). Right now, I simply check for its existence with:

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#[IF]  $gpslatitude $gpslongitude $sampletime
#[BODY]<trkpt>
#[BODY]  <lat>$gpslatitude#</lat>
... etc.


Is it possible to check if those GPS latitudes and longitudes do not equal to zero? If so, how would I go about doing this?

Thanks, and apologies if this has already been answered

[Phil Harvey]

Sure.  You can do something like this:

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#[IF]  ${gpslatitude;$_ = undef if $_ == 0} ${gpslongitude;$_ = undef if $_ == 0} $sampletime

- Phil

[samk]

Thank you very much

[Phil Harvey]

Oh.  Actually for this to work properly you need to test the numerical value:

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#[IF]  ${gpslatitude#;$_ = undef if $_ == 0} ${gpslongitude#;$_ = undef if $_ == 0} $sampletime