Re: [Flightgear-devel] Help required with bug 340 (textranslate animation problems)

[Torsten D. <To...@t3...>]

> Thanks!
> 
> No idea how it could have worked before. I've committed an update as
> described above.
> 
> However, I'm still seeing some strangeness:
> 
> 1) Sometimes I'm seeing "99" rather than "100"
> 2) Even with these changes, the -1000 value is incorrect.
> 
> I suspect that there's some floating point issue somewhere, but I don't see
> how it has only just come to light, and it seems very unlikely to affect
> such straightforward
> numbers.
Yes - that has been a known "feature" for long. 
There is a <bias> element to add an offset to the property value just before 
step and scroll are applied. If you pick it small enough, It gets cut off by 
the <step> element but gets you past the roundoff error.

This might work (untested)
  <animation>
    <type>textranslate</type>
    <object-name>vs-digit2</object-name>
    <property>/autopilot/KAP140/settings/target-pressure-rate-fpm</property>
    <factor>0.0001</factor>
    <step>1000</step>
    <bias>0.001</bias> <!-- any small number does the trick -->
    <axis>
      <x>1</x>
      <y>0</y>
      <z>0</z>
    </axis>
  </animation>

Torsten