[osg-users] Serialization differences between ASCII and XML

[Robert Osfield]

Hi Hartwig,

I'm not yet back to work so just quick reply.  What you describe looks
like a bug, when I return to work I'll look into it, albeit as part of
queue of support issues that have accumulated this holiday...

What would help me is a small example that illustrates the problem so
I can reproduce it at my end.  If your project is open sourced then a
link to the code that you are seeing a problem with would help as
well.

As a general comment, there are lots of helper macros for serializers
that can often avoid the need for custom user serializers, for
instance if your properties are a Vec4d you should be able to just use
the macros to read/write them.  Have a look through the
OpenSceneGraph/src/osgWrappers/serialzers/osg for examples of this in
action.

Robert.

On 27 December 2017 at 17:49, Hartwig Wiesmann
<hartwig.wiesmann at skywind.eu> wrote:
> Hi,
>
> wrote a simple serialiser for the output of a range:
>
>
> Code:
>
> namespace
> {
>         bool checkGeographicRange(osgPlanetCore::GeodeticData const&)
>         {
>                 return true;
>         }
>
>         bool readGeographicRange(osgDB::InputStream& inputStream, osgPlanetCore::GeodeticData& geodeticData)
>         {
>                 osgPlanetCore::GeographicRange geographicRange;
>
>
>                 if (osgPlanetWrappers::readRange(inputStream,geographicRange))
>                 {
>                         geodeticData.setGeographicRange(geographicRange);
>                         return true;
>                 } /* if */
>                 else
>                         return false;
>         }
>
>         bool writeGeographicRange(osgDB::OutputStream& outputStream, osgPlanetCore::GeodeticData const& geodeticData)
>         {
>                 outputStream << std::endl;
>                 return osgPlanetWrappers::writeRange(outputStream,geodeticData.getGeographicRange());
>         }
>
> } /* namespace */
>
>         template < typename Values >
>         bool readRange(osgDB::InputStream& inputStream, osgPlanetCore::Range< Values >& range)
>         {
>                 inputStream >> inputStream.BEGIN_BRACKET;
>                 inputStream >> inputStream.PROPERTY("FromValues") >> range.getFromValues();
>                 inputStream >> inputStream.PROPERTY("TillValues") >> range.getTillValues();
>                 inputStream >> inputStream.END_BRACKET;
>                 return true;
>         }
>
>         template < typename Values >
>         bool writeRange(osgDB::OutputStream& outputStream, osgPlanetCore::Range< Values > const& range)
>         {
>                 outputStream << outputStream.BEGIN_BRACKET << std::endl;
>                 outputStream << outputStream.PROPERTY("FromValues") << range.getFromValues() << std::endl;
>                 outputStream << outputStream.PROPERTY("TillValues") << range.getTillValues() << std::endl;
>                 outputStream << outputStream.END_BRACKET << std::endl;
>                 return true;
>         }
>
>
>
>
>
> In a wrapper I call
>
> Code:
>
>         ADD_USER_SERIALIZER(GeographicRange);
>
>
>
>
> Basically serialisation should write / read two vectors indicating a lower and a higher limit of a geodetic range.
>
> The ASCII output looks like:
>
> GeographicRange
> {
> FromValues -135 40.9799 -10000
> TillValues -90 66.5133 10000
> }
>
> Which seems to be fine.
>
> The XML output looks like:
>
>           < FromValues attribute="-135 40.9799 -10000&nl;" >
>             < TillValues attribute="-90 66.5133 10000&nl;&nl;" >
>              < /TillValues >
>           < /FromValues >
>
> Which is not really the same. Besides the fact that "GeographicRange" is gone completely.
>
> How do I make the output of both versions the same?
>
> Cheers,
> Hartwig
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=72645#72645
>
>
>
>
>
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