While working on 3D cockpit instruments I keep hitting into issues with
internal floating point representation and the <textranslate><step> tag.
The <step> tag effectively truncates the property, 29.919999999999
becomes 29.91, so a (3D) readout reads off one number. The electronics
technician in me says, "but digital readouts are always +/- the last
digit." But the craftsman in me wants the readout to read correctly.
The tag I expected to use to fix this, <offset>, is applied after the
<step> tag and therefore has no effect.
I am proposing an new tag, <bias>, that will act like <offset> but be
applied before <step> and <scroll>
Example:
<animation>
<type>textranslate</type>
<object-name>digit5</object-name>
<property>autopilot/KAP140/settings/baro-setting-inhg</property>
<factor>10</factor>
<step>0.01</step>
<bias>0.005</bias>
<axis>
<x>1</x>
<y>0</y>
<z>0</z>
</axis>
</animation>
I've hardcoded this into simgear and it works. If no one objects or has
a better idea I will try to figure out how to add this tag.
Thanks,
Ron
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