An arc entity is a continuous portion of a circle; part of a circle's circumference (also called a circle segment).

In , the Arc Entity consists of the following data in addition to the Common Data:
Property Name
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Data Type
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Description
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Center Point
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3D Point (X, Y, Z coordinates)
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Center point of the circle that this arc represents.
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Starting Angle
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Scientific Data (degrees, radians)
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Angle of origin of the arc in relation to the Cartesian plane (360 degrees)
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Ending Angle
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Scientific Data (degrees, radians)
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Angle of completion of the arc in relation to the Cartesian plane (360 degrees)
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Radius
|
Scientific Data
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The line segment distance from the arc's center to any point on the arc
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Start Point
|
3D Point (X, Y, Z coordinates)
|
Starting point of arc.
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Through Point
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3D Point (X, Y, Z coordinates)
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Any point on this arc. Initially, this point is set to be equal to Mid Point. When this property is changed, arc is recalculated such that it passes through Start Point, new Through Point and End Point. Mid Point is recalculated and Through Point is also updated to be equal to Mid Point.
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Mid Point
|
3D Point (X, Y, Z coordinates)
|
Mid point on arc between Start Point and End Point.
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End Point
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3D Point (X, Y, Z coordinates)
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Ending point of arc.
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In above properties are shown in the Selection Property Tree when an arc entity is selected using the Selection Tool.
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| Click on image to see detail view. |
To draw an Arc:
Entity toolbar :
Arc(Start-Center-End)
Arc(Start-Center-Angle)
Arc(Start-Center-Chord Length)
Arc(Start-Middle-End)
Tool Menu : Create Ä Arc Ä Start - Center - End
Ä Start - Center - Angle
Ä Start - Center - Chord Length
Ä Start - Middle - End
See also:
Start-Center-End Arc Tool
Start-Center-Angle Arc Tool
Start-Center-Chord Length Arc Tool
Start-Middle-End Arc Tool