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Polygon > Freeform / Surface (Draw Menu) |
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This command creates a surface. A surface can be a simple sequence of lines, but it can also consist of multiple outlines, which each are any sequence of lines, Bézier curves, and arcs.
For basic information on this type of object, please refer to Surfaces and Curves (Introduction).
The start point of the first outline can be entered with the mouse by clicking at any point in the drawing.
For subsequent points, use the buttons in the Parameter Window to select the type of drawing elements to append to the surface. By default, lines will be added. The input changes depending on the chosen element type:
Lines will be added to the previously specified curve. Their end points can be positioned anywhere.
Lines will be added tangentially to the previously specified curve.
Circular arcs will be added to the previously identified curve. The circular arc is determined by two end point and a point through which it should run.
Circular arcs will be added to the previously entered curve. The circular arc begins tangential to the specified curve and ends at a specified point.
Circular arcs will be added to the previously specified curve. They are determined by specifying a center point and the end angle.
The arc direction of existing arcs is unaffected. To change the arc direction of a circular arc within a curve, use the command. Trim Curve > Edit.
Bézier curves will be added to the specified curve. The Bézier curve direction is fully independent of the current curve direction.
Bézier curves will be added to the previously specified curve. The Bézier curve starts tangential at the previous curve's end point which ensures a smooth transition.
This calls the "Options Curve / Surface" dialog, in which you can modify the current direction for "tangential".
In many cases it is sensible to draw partial surfaces (rectangles, circles, etc.) and combine them using Trim Surface > Union (A=A+B), Trim Surface > Intersection (A=A×B) and Trim Surface > Difference (A=A-B). Alternatively, several outlines can also be combined into one surface using Surface / Curve > Combine Outlines.
The sequence of point entries is repeated until the entry is ended by pressing the right mouse button or the
A surface entered directly with this command can consist of up to 2,000 points, whereby a line requires one point, an arc requires two points and a Bézier curve requires three points. If this limit is reached during input, no further point inputs will be accepted.
The surface created is assigned to the currently active layer. It also contains a reference to the currently active pen.
The multiline function can only be used if the surface consists of exactly one outline and only lines.
A quick reminder: 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 identify all objects again.
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