[Gmod-help] insert size dependent color in gbrowse

[Mundry, Marvin]

hi,
i am visualizing illumia paired end reads using Bio::DB::Sam.
i would like to set the fgcolor of the pairs according to the insert size in order to easily identify structural variation. 

fgcolor       = sub {
                       my insertsize=???
                       if (insertsize>350) {
                        return 'red';
                       }else{
                        if (insertsize<300) {
                         return 'red';
                        }else{
                         return 'green';
                        }
                       }
                    }

how can i retrieve the insert size?

regards,

Marvin Mundry
Evolutionary Bioinformatics
Institute for Evolution and Biodiversity
Huefferstrasse 1, D-48149 Muenster, Germany
Phone: +49-251-83-21633
Fax: +49-251-83-24668
http://www.uni-muenster.de/Evolution.ebb