[osg-submissions] Fix georeference of gdal plugin

[Robert Osfield]

HI Cedric,

Could you provide work flow which illustrates the problem you've seen
so I can recreate at me end.

I don't believe your changes are wholly appropriate, and perhaps miss
the point of the some of the code, this code might be buggy... but
does have a purpose.

Cheers,
Robert.

On Dec 8, 2007 2:36 PM, Cedric Pinson <mornifle at plopbyte.net> wrote:
> Hi Robert,
> Here a patch for gdal reader, it did not take the georeference
> correctly. I added a diff to show you the difference. with my fix it
> works as expected for a tiff georeferenced.
>
>
> diff for info:
> 0a1,9
>  > /**
>  >  * Who is the original author ???
>  >  *
>  >  *
>  >  * Modified (2007)
>  >  *
>  >  *  Authors:
>  >  *  Cedric Pinson <mornifle at plopbyte.net>
>  >  */
> 666c675
> <             TopLeft[1] = geoTransform[1];
> ---
>  >             TopLeft[1] = geoTransform[3];
> 736c745
> <
> ---
>  >
> 738,739c747,748
> <                         osg::notify(osg::INFO)<<"flipping"<<std::endl;
> <                         unsigned int copy_r = hf->getNumRows()-1;
> ---
>  >                 osg::notify(osg::INFO)<<"flipping"<<std::endl;
>  >                 unsigned int copy_r = hf->getNumRows()-1;
> 742,751c751,760
> <                     for(unsigned int c=0;c<hf->getNumColumns();++c)
> <                     {
> <                         float temp = hf->getHeight(c,r);
> <                         hf->setHeight(c,r,hf->getHeight(c,copy_r));
> <                         hf->setHeight(c,copy_r,temp);
> <                     }
> <                 }
> <                 hf->setOrigin(osg::Vec3(BottomLeft[0],-BottomLeft[1],0));
> <
> hf->setXInterval((BottomRight[0]-BottomLeft[0])/destWidth);
> <                 hf->setYInterval((TopLeft[1]-BottomLeft[1])/destHeight);
> ---
>  >                      for(unsigned int c=0;c<hf->getNumColumns();++c)
>  >                      {
>  >                          float temp = hf->getHeight(c,r);
>  >                          hf->setHeight(c,r,hf->getHeight(c,copy_r));
>  >                          hf->setHeight(c,copy_r,temp);
>  >                      }
>  >                 }
>  >                 hf->setOrigin(osg::Vec3(TopLeft[0],BottomLeft[1],-100));
>  >                 hf->setXInterval(geoTransform[1]);
>  >                 hf->setYInterval(-geoTransform[5]);
>
> Cheers
>
> --
> +33 (0) 6 63 20 03 56  Cedric Pinson mailto:mornifle at plopbyte.net http://www.plopbyte.net
>
>
>
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