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Combining closed curves

If you draw a Bézier curve segment and, at the end point of the segment, click and

hold the mouse button, followed by a single press of the Alt key, the curve is closed

with a straight line and you are placed in Combining mode. You can now begin a

second curve at an arbitrary point. Ending the drawing with a double-click also closes

this curve. If you end it with an Alt-click as described above, you can draw further

curves. The curves that you have just drawn form a common object, a so-called

Combination. You can use this (for example) to place holes in filled curves.

If you want to bind two curves together into a Combination at some stage, select both

curves and use Modify > Combine.

Even if you use a Combination, the individual curves are still available as objects. You

can use Modify > Split to convert the Combination back to single objects.

You can create Combinations only from closed curves. Other objects, such as

rectangles or polygons, will be automatically transformed into curves, and curves

that are not closed will be closed with a straight line.

Connecting curves

To join curves together, select them and use Modify > Connect. A connection is only

possible with open curves. If you use this tool on closed curves, they are first opened

and an additional end point inserted at the starting point. A straight line is used to

connect the curves.

The behavior of connected curves cannot (at present) be modified. It is not obvious in

advance how the transition properties of the connected curves are calculated, nor

which end points will be connected. It is therefore a good idea to work on a copy and

try out the effect with different positions of the end points of the individual curves. To

avoid changes to a shape, first set the property of the new connection point to the

type Corner point.

Adding comments to a drawing

Starting with OOo 3.2, Draw supports comments (formerly called notes) similar to

those in Writer and Calc. To insert a comment, choose Insert > Comment from the

menu bar. A small box containing your initials appears in the upper left-hand corner

of the Draw page, with a larger text box beside it. Draw has automatically added your

name and the date at the bottom of this text box.

Chapter 10 Advanced Draw Techniques 201

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OpenOffice.org OpenOffice - 3.3 Guía de usuario Pagina 201