update sample with RegularPolygon
update sample with RegularPolygon

kkuunnddaannkk/vispy,Eric89GXL/vispy,jdreaver/vispy,ghisvail/vispy,inclement/vispy,QuLogic/vispy,QuLogic/vispy,bollu/vispy,bollu/vispy,Eric89GXL/vispy,srinathv/vispy,RebeccaWPerry/vispy,RebeccaWPerry/vispy,drufat/vispy,sh4wn/vispy,michaelaye/vispy,sh4wn/vispy,drufat/vispy,bollu/vispy,jay3sh/vispy,RebeccaWPerry/vispy,inclement/vispy,kkuunnddaannkk/vispy,sbtlaarzc/vispy,QuLogic/vispy,dchilds7/Deysha-Star-Formation,sh4wn/vispy,srinathv/vispy,drufat/vispy,Eric89GXL/vispy,michaelaye/vispy,inclement/vispy,jay3sh/vispy,dchilds7/Deysha-Star-Formation,jdreaver/vispy,ghisvail/vispy,ghisvail/vispy,julienr/vispy,julienr/vispy,dchilds7/Deysha-Star-Formation,srinathv/vispy,kkuunnddaannkk/vispy,sbtlaarzc/vispy,jdreaver/vispy,michaelaye/vispy,julienr/vispy,jay3sh/vispy,sbtlaarzc/vispy