Hola,
there is a bug in RTArrowedLine: the width: message (defined in the RTAbstractArrowedLine superclass) does not set the width of the head. Could something like the code below be added? This code solves the problem for me.
RTArrowedLine>>width: aNumber
super width: aNumber.
self head width: aNumber.
and I imagine something similar should be done with RTDoubleArrowedLine (but I have no experience with that guy).
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