Coordinates of polygon

[Boak]

noob here... I am not able to figure out how to position a polygon in a scene.
When adding a polygon to a scene, i.e. scene.add.polygon(x,y,points...), what does x,y really set? Should the points be relative to x,y? it seems that the position depends on the shape of the polygon(?). Cant find any pointers in the docs and the more I fiddle with this, the more confused I get...