Doubleline intersection

[Michael M. Bech]

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Hello PSTricks Experts,

For some block diagrams in control theory I need draw a lot of node
connections with [doubleline=true]. A sample diagram is here:


  |--------|                    \ |---------|
  |        |---------------------\|         |
  |   A    |----------   --------/|    C    |
  |        |          | |       / |         |
  |--------|          | |         |---------|
                      | |
  |--------| /        | |
  |        |/---------  |
  |   B    |\-----------| 
  |        | \          
  |--------|          


The node connections are made by:
              
\ncline[doubleline=true]{->}{A}{C}%
\ncbar[doubleline=true, armA=0.5cm]{->}{A}{B}%


Now, the problem is the intersection point of the double lines:
I get something like this

  |--------|                    \ |---------|
  |        |----------|-|--------\|         |
  |   A    |----------| |--------/|    C    |
  |        |          | |       / |         |
  |--------|          | |         |---------|

but I would like the intersection to be "open" as shown in the first figure.


Does anyone know how to resolve this problem ?

Any help will be highly appreciated.


Kind Regards,

Michael Bech



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