Table Of Contents

Graph IDE ► Basic Graphics ► Circle

A circle is defined as a closed curve of constant distance from a point. It can be transformed into an ellipse and also has associated attributes, such as wedge angles and graphic attributes. The figure below shows some examples of a circle.

Circles are useful in their own right and also used for Point Tags markers and Pie Chart wedge sections.

Some standard operations are itemized below.

• To create a circle bring forward the Graphic Selector, click the circle factory cell and then mouse down on a Graphic View and drag the cursor to another point. The initial and final cursor locations define the boundary of a normal-form ellipse. If the width and height are the same then it is a circle.

• You can also create circles from the standard Palettes ► Basics ► Circles menu item or drag them out from the circle Factory Inspector.

• Resizing and rotating the circle transforms it to an ellipse. Defining different start or end wedge angles transforms the circle (or ellipse) into a pie-section. For more information see Standard Editing.

• To program a circle see the Programming section.

Inspector Editor

The Inspector Editor for the circle is shown below.

Menu Shortcuts

Menu shortcuts are common to all graphics and are described in the Graphics section.

Pie Section Parameters

Start Wedge Angle : The start angle, from the y = 0, x > 0 line, of the wedge section. Note: The wedge section is not the empty area but rather the remaining circle part. The dial control is described in the Dial section.

End Wedge Angle : The end angle, from the y = 0, x > 0 line, of the wedge section. Note: The wedge section is not the empty area but rather the remaining circle part. The dial control is described in the Dial section.

Normal Form

Reset To Normal Form : Select this to set the width and height of the ellipse to the reference frame of the graphic.

Common Controls

Other controls common to all graphics are described in the Graphics section.