[vtkusers] moving cells 1/2 cm

[Jochen K.]

Just to make my former reply more precise have a look at the following image:
http://vtk.1045678.n5.nabble.com/file/n5713950/triangle-zoom-with-given-distance-between-parallel-legs.png 

In the equations shown in my first reply replace 0.5 with a'.

In case you have trouble to compute alpha or struggling with this approach
in general just leave another post.

with best regards
Jochen

P.S.: There exists several other approaches, some which even don't require
calculating angles and may be faster probably. 


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