[pdal] help - Compilation success :)

[JCH]

Yeh I start to instance all Stages and filters by using 
pdal::stagefactory::createReader,pdal::stagefactory::createFilter, or 
pdal::stagefactory::createWriter, but it's not working with empty 
options (even crashing).


Jerome Chatillon

Howard Butler a écrit :
> Right now you have to create a dummy pipeline and add your filters to it to get a real instance and then do getDefaultOptions.
>
> How can we make this better?  Some sort of StageRegistry?
>
> On Jan 6, 2012, at 11:40 PM, Michael P. Gerlek wrote:
>
>> I'm no longer sure.  It's a good question, though -- one that we've thought about.  Howard?
>>
>> (For what it's worth, I hope that in a month from now we'll have some good tutorial/examples in the docs for this sort of thing.)
>>
>> -mpg
>>
>>
>>> -----Original Message-----
>>> From: pdal-bounces at lists.osgeo.org [mailto:pdal-bounces at lists.osgeo.org] On Behalf Of Jérôme Chatillon
>>> Sent: Friday, January 06, 2012 3:32 AM
>>> To: pdal at lists.osgeo.org
>>> Subject: [pdal] help - Compilation success :)
>>>
>>> About my first question (few minutes ago):
>>>
>>> First question (maybe stupid): how can I know I get the options of a pdal::filter without using it ? Because I need:
>>> - pdal::Stage&  prevStage (but I don't have one)
>>> - pdal::Option&  options (this I can create an empty one)
>>>
>>>
>>> -->  Actualy, a pdal::filter as static functions s_getName() and s_getDescription() (automaticly implemented by
>>> SET_STAGE_NAME(name, description) ). So i get easily get the name and the description without instance of the class. About the
>>> default options i found this in StageBase.hpp:
>>>
>>> /// Everyone must implement this.  If you want to access the list of
>>>     /// options "statically", you are free to construct the stage with no
>>>     /// arguments and cal getDefaultOptions() on it -- there is no need
>>>     /// to call initialize(), so it should be a fast/safe operation.
>>>     ///
>>>     /// @return The default options.
>>>     virtual const Options getDefaultOptions() const = 0;
>>>
>>> So it's a virtual, not static. I tried : pdal::filters::Attribute::Attribute().getDefaultOptions(); but of course it's not correct :P
>>>
>>> So how to get the default option withou filter instance ?
>>>
>>> Thanks
>>>
>>> Jérôme Chatillon
>>>
>>> TerraImaging
>>> Groenewoudsedijk 40
>>> 3528 BK  Utrecht
>>> The Netherlands
>>>
>>> tel: +31 (0)30-686 616 7
>>> fax: +31 (0)30-686 616 6
>>> email: j.chatillon at terraimaging.nl
>>> skype: terraimaging_jchatillon
>>>
>>>
>>> De : Jérôme Chatillon
>>> Date d'envoi : vendredi 6 janvier 2012 11:44
>>> À : pdal at lists.osgeo.org
>>> Objet : help - Compilation success :)
>>>
>>>
>>> Hi,
>>>
>>> I compiled PDAL from source, and start to 'play' with in my Qt project.
>>>
>>> My first goals are:
>>> - learn pipeline/stage using sources
>>> - create my own filter(s)
>>>
>>> First question (maybe stupid): how can I know I get the options of a pdal::filter without using it ? Because I need:
>>> - pdal::Stage&  prevStage (but I don't have one)
>>> - pdal::Option&  options (this I can create an empty one)
>>>
>>> Cordialement,
>>>
>>> Jérôme Chatillon
>>>
>>> TerraImaging
>>> Groenewoudsedijk 40
>>> 3528 BK  Utrecht
>>> The Netherlands
>>>
>>> tel: +31 (0)30-686 616 7
>>> fax: +31 (0)30-686 616 6
>>> email: j.chatillon at terraimaging.nl
>>> skype: terraimaging_jchatillon
>>> _______________________________________________
>>> pdal mailing list
>>> pdal at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/pdal
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