Re: [PyX-devel] [PATCH 1/2] arrow: position reversed arrow correctly

[André W. <wo...@us...>]

Hi Michael,

there is one interesting point in here which I don't want to die.

Am 23.05.2012 um 18:05 schrieb Michael J Gruber:
> And no, splitting a path for every decoration that I put there is not a
> solution. Just thing of annotating an integration path. Do you really
> suggesting stroking it piecewise, or over and over again? The beauty of
> the deco module in PyX is the fact that you have *one* path carrying
> allow decorations (text labels, arrow heads and what not). For that you
> have to be able to position them consistently (say, text label at pos
> for arrow at pos).

I agree. And I did see it already, but I don't have a proper solution yet. Sure, you want to stoke the path in a single operation. You can add multiple arrows and text. But how do you define their position? For text we have pos but also arclenfrombegin and arclenfromend. But you probably don't want to mess around with arclen either. Furthermore, for text you have halign.left, halign.center and halign.right. Maybe we need something like this for arrows too. Still I think using path.intersect() is a great and very PyX-like way of doing things. Now, how do you enter such a position into the decorators? Splitting the path and using "end of the path" is a solution, but it is not the nicest one I could envision. I don't have a solution so far.

Best,


André

-- 
by  _ _      _    Dr. André Wobst, Amselweg 22, 85716 Unterschleißheim
   / \ \    / )   wo...@us..., http://www.wobsta.de/
  / _ \ \/\/ /    PyX - High quality PostScript and PDF figures
 (_/ \_)_/\_/     with Python & TeX: visit http://pyx.sourceforge.net/