Bézier Spline via DeBoor Points

Advanced Drawing > Bézier Spline via DeBoor Points (Draw Menu)

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This command draws a Bézier spline based on the DeBoor algorithm, which relies on a polyline. A polyline is an open series of connected lines.

1.	Enter start point

The start point of a polyline can be entered by clicking the mouse anywhere within the drawing.

2.	Enter point

After entering the start point, several points can be entered, one after another. The polyline begins at the start point and runs through all the subsequently-entered points. These points can be entered by clicking the mouse at any point in the drawing for each point.

Polyline input is ended by clicking the right mouse button. Unlike most other commands, this does not lead to the previous entry being ignored; instead the polyline is inserted into the drawing. If required, this can be undone using the Undo command.

A Bézier spline can consist of up to 1000 curves. If this limit is reached during point entry, no further points can be entered. The Bézier spline is stored internally as an extended object. In order to be able to manipulate it using the same commands that can be used on curves, you will first have to resolve it using the Shape > Resolve Extended Objects command.

The curve created is assigned to the current layer. It also contains a reference to the current pen.

Note: All point entries can be undone step by step using Previous Point (ESC) or by pressing the ESC key. This enables incorrect entries to easily be corrected without having to enter the entire polyline again.