How do I keep a gsave/grestore protected fill object from flooding the clipping path meant to clip the object

Question

I have defined a clipping path and then defined an object (closed path) to be filled protected within a gsave/grestore block. The clipping path should clip the object and leave the remaining object filled within a the unfilled background of the clipping path. But the result is the entire clipping path is filled. How do I stop this?

An example is:

/inch {72 mul } def

/triangle {gsave .9 setgray

0 inch 0 inch moveto

5 inch 0 inch lineto

2.5 inch 5 inch lineto

0 inch 0 inch lineto fill 0 setgray

0 inch 0 inch moveto

5 inch 0 inch lineto

2.5 inch 5 inch lineto

0 inch 0 inch lineto stroke

grestore} def

/SquarePath {newpath

1 inch 0 inch moveto

3 inch 0 inch lineto

3 inch 8 inch lineto

1 inch 8 inch lineto

1 inch 0 inch lineto closepath} def

% draw it

1 inch 1 inch translate

SquarePath clip

triangle

showpage

Any ideas? Thanks in advance

jdeubert · Answer

Hi.One of clip's surprises is that it doesn't erase the current path, as do fill and stroke. Add a call to newpath immediately after the clip and the code should behave as you intended.By the way, in case you haven't stumbled on this before, you can simplify your triangle code significantly by using another, nested, gsave-grestore pair:/triangle {gsave .9 setgraygsave0 inch 0 inch moveto5 inch 0 inch lineto2.5 inch 5 inch lineto0 inch 0 inch lineto fillgrestorestroke grestore} defHope this helps.- John-------John DeubertAcumen TrainingPostScript & PDF consulting and trainingjohn@acumentraining.comwww.acumentraining.com

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