Hi Andreas,
On 05.05.08, Andreas Matthias wrote:
> Joerg Lehmann wrote:
[snip]
> > This is actually more a Postscript question than a PyX one.
> > Anyway, the moveto implicitely closes the current subpath, i.e. it adds a
> > straight line from the last point of this subpath to its first one.
> > Afterwards, a new subpath is started from the point given as argument to
> > the moveto statement.
I should add that this implicit closing does not happen if you just
stroke the path. Only operations which require an area, like filling or
clipping, need lead to the closing of the path.
Btw, the notation of subpaths, etc. is briefly explained in
the PyX reference manual
http://pyx.sourceforge.net/manual/node6.html
and in this example:
http://pyx.sourceforge.net/examples/drawing/pathitem.html
> > In your case, the current subpath is just a simple straight line
> > and closing it, for a clipping operation, just gives the degenerate
> > situation of clipping region of zero area.
>
> Oh, I see. Thanks.
>
> Is there a way to remove these moveto commands? What should I do
> if I want to construct the clipping path by appending several
> individual paths?
Use the << operator:
clip = clip1 << clip2 << clip3 << clip4
Cheers,
Jörg
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