polygon[0] = (70.711cos(i))+centerx polygon[1] = (70.711sin(i))+centery polygon[2] = (70.711cos(i+((pi2)/3)))+centerx polygon[3] = (70.711sin(i+((pi2)/3)))+centery ...

To achieve that goal it was necessary to extrude a polygon with a given slope. I didn't find any utility that could do that, so I wrote a python code which does that by triangle based mesh generation.