# Arrow decoration in TIKZ [duplicate]

Possible Duplicate:
TikZ: How to draw an arrow in the middle of the line?

I'd like to use Tikz for drawing Feynman diagrams. I found an example in TeXample, but it looks inefficient.

One of the things I would appreciate is that the decoration > would appear midway of each part of the path, say

\draw[mypath] (0,0) -- (1,1) -- (2,1) -- (3,0);

to produce a path formed by three arrows.

Questions

• Is this possible?
• How should the style by defined?
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