close a path for multiple curves

Hi, Alan -

The root of the problem is that you are constructing each of the three bezier curves as a separate path, so they are stroked and, more importantly for you, filled separately. You need to do them as a single path.

Remember that the curveto operator leaves the current point at the far end of the bezier curve. That means that you can immediately follow a call to curveto with another call to curveto. Consider these two curves:

.2 1 .5 setrgbcolor

% 1st curve

300 100 moveto

400 100

400 200

300 200 curveto

fill

% 2nd curve

300 200 moveto

200 200

150 150

200 125 curveto

fill

These curves are constructed and filled separately, so they don’t end up looking like a single filled object:

To fix this, we'll take advantage of the fact that the first curve, before we filled it, left the current point at 300,200; we can use that current point as the beginning of the second curve, thusly:

.2 1 .5 setrgbcolor

% 1st curve

300 100 moveto

400 100

400 200

300 200 curveto     % Leaves CP at 300,200

% 2nd curve  (starts at 300,200)

200 200

150 150

200 125 curveto

fill

We now are adding the two curves to the same path; they will fill as a single object, as you wanted.

I hope this helps (and that this was what you were actually asking :-).

- John

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John Deubert

Acumen Training

PostScript & PDF consulting and training

john@acumentraining.com

www.acumentraining.com