decouple primitive geom creation from drawing

[genmeblog]

To enable use of Area object

[adicirstei]

An alternative approach would be to have a p5js style simplified api consisting of positive and negative shapes. See:
http://p5js.org/reference/#/p5/beginContour

[rrrnld]

I'm currently using thi.ng.geom for geometry creation / manipulation and draw the thi.ng primitives with a protocol that I have defined, that works quite well (+ allows me to export to other formats).