Giuseppe Bilotta wrote:
Wednesday, November 16, 2005 Giuseppe Bilotta wrote:
Does MetaFun provide some macro to draw oriented paths? I
would like it to basically add a small arrow *in the middle*
of the path? Such a macro
draworiented somepath somespecs ;
would have to act like
drawarrow firsthalf(somepath) somespecs ;
draw secondhalf(somepath) somespecs ;
Is it available already, or should I roll my own?
Hm. I came up with
def draworiented expr c =
path _c_ ; _c_ := c ;
do_draworiented
enddef ;
def do_draworiented text t =
draw _c_ t ;
drawarrow subpath(0, length(_c_)/2) of _c_ ;
enddef;
which works, although I have to do
draworiented (reverse p1)
Is there an easy way to have it work with
draworiented reverse p1 ?
add another step (do_do_) , first pick up 'reverse p1' as expression,
save that in a path variable, and then pick up the text
Hans
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