An arc entity is a continuous portion of a circle; part of a circle's circumference (also called a circle segment).
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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The 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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The angle of origin of the arc in relation to the Cartesian plane (360 degrees), that is, zero degrees is on the x-axis.
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Ending Angle
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Scientific Data (degrees, radians)
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The angle of completion of the arc in relation to the Cartesian plane (360 degrees), that is, zero degrees is on the x-axis.
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Radius
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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
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3D Point (X, Y, Z coordinates)
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The starting point of arc.
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Through Point
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3D Point (X, Y, Z coordinates)
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Initially this point is calculated as the middle point of the arc. But when modified by grip point or field value, the new point will be treated as a through point.
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Mid Point
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3D Point (X, Y, Z coordinates)
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The calculated, un-editable, middle 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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The ending point of arc.
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The 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 see the tools:
Start-Center-End Arc Tool
Start-Center-Angle Arc Tool
Start-Center-Chord Length Arc Tool
Start-Middle-End Arc Tool