[metapost] accessing control points

[Hans Hagen]

Stephan Hennig wrote:
> Hi,
>
> is there a way to access control points of a bezier curve segment in
> MetaPost other that "show"ing a path on the console?
>   
in mp-tool in the metapost/context/base path you will find numerous example of path decomposition, like 

def do_drawcontrollines text t =
  for _i_=0 upto length(_c_) :
    normaldraw point _i_ of _c_ -- precontrol  _i_ of _c_ _lin_opt_ t ;
    normaldraw point _i_ of _c_ -- postcontrol _i_ of _c_ _lin_opt_ t ;
  endfor ;
enddef;

Hans

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