couple of metafun questions

["Thomas A. Schmitz" <thomas.schmitz@uni-bonn.de>]

Hi all,

I'm experimenting with some metafun code and positional graphics to  
produce a nice illustration for an article. There's some basic  
questions I haven't been able to solve (and I remember that I  
couldn't solve them before but found workarounds, but this time it  
looks like I'm stuck):

1. Is it possible to have a MPpositiongraphics anchored to more than  
two positions? Like
draw position1 -- position2 .. position3 ?



2. Related to 1.: Is it right that you can't anchor more than 1  
MPpositiongraphic to one anchor? If I have:

drawsomething position1 -- position2

I can't then say

drawsomething position1 .. position3

but must work around by reversing

drawsomething position3 .. position1



3. Is it possible to get a line/arrow dashed in two different colors,  
like red and blue?

Sorry if these are silly questions, but I just dabble into metafun!

Thanks, and best

Thomas