Extend chart with descendant generations

[godzil3]

Is is possible to deveop funtionality to include descendant generations in space down below the chart? I mean default chart is 210 degree, to full circle left 150 dedgree and for example 140 degree could be used for small fan chart with descendant generations
thanks!

[magicsunday]

Hello. Do you have an example of what that might look like?

[godzil3]

here's quick sketch

EDIT:
i find out it's not new idea, Gramps is calling this type of chart 2-Way Fan Chart
https://www.gramps-project.org/wiki/index.php/File:ChartsCategory-2wayfan-fullcircle-ances4gen-descen4gen-default-50.png
also FamilySearch porbably have it
http://larrycragunfamily.blogspot.com/2013/04/3-cheers-for-familysearch-upgrade-is.html