OdDbCircle Class

Class Hierarchy

Syntax

C++

class OdDbCircle : public OdDbCurve;

File

DbCircle.h

Description

This class implements the circle object (Circle entity) in the database. This class inherits the base functionality of entities. A circle is a circular closed figure in world space.

See Also

TD_Db

Example of Working with the Circle Object

Working with Circles

OdDbArc, OdDbEllipse classes

Group

OdDb Classes

Public Methods

	Name	Description
	OdDbCircle	Builds an instance of the circle object.

OdDbCircle Methods

	Name	Description
	center	Returns the WCS coordinates of the circle center (DXF 10) as three-dimensional point instance.
	dwgInFields	Reads the .dwg file data of this object.
	DWGMAP_DECLARE_MEMBERS	This is DWGMAP_DECLARE_MEMBERS, a member of class OdDbCircle.
	dwgOutFields	Writes the .dwg file data of this object.
	dxfInFields	Reads the DXF data of this object.
	dxfInFields_R12	Reads the DXF R12 format data of this object.
	dxfOutFields	Writes the DXF data of this object.
	dxfOutFields_R12	Writes the DXF data of this object.
	getArea	Returns the area of the circle calculated using the classic formula (PIRR).
	getDistAtParam	Computes the distance along the circle measured from the OCS X-axis to the point on the circle specified the parameter.
	getEcs	Returns the entity coordinate system matrix.
	getEndParam	Gets the end parameter value. The end parameter equals the 2PI. Parameter is an angle measured counterclockwise from the OCS X-axis in the range 0 to 2PI radians.
	getEndPoint	Computes the WCS coordinates of the end point on the circle for which the parameter equals the circumference. The end point coincides with the start point.
	getFirstDeriv	Computes the first derivative for the specified parameter of the circle entity and returns the three-dimensional vector instance.
	getOdGeCurve	Returns an OdGeCurve3d that is geometrically identical to this OdDbCurve.
	getParamAtDist	Computes the parameter at the distance along the circle. Parameter is an angle measured counterclockwise from the OCS X-axis in the range 0 to 2PI radians.
	getParamAtPoint	Computes the parameter at the point placed on the circle. Parameter is an angle measured counterclockwise from the OCS X-axis in the range 0 to 2PI radians.
	getPlane	Gets a plane in which the circle entity places. This method is inherited from the OdDbEntity class.
	getPointAtParam	Computes the WCS coordinates of the point on the circle at the specified parameter value. Parameter is an angle measured counterclockwise from the OCS X-axis in the range 0 to 2PI radians.
	getSecondDeriv	Computes the second derivative for the specified parameter of the circle entity and returns the three-dimensional vector instance.
	getStartParam	Gets the start parameter value. The start parameter equals zero for circles. Parameter is an angle measured counterclockwise from the OCS X-axis in the range 0 to 2PI radians.
	getStartPoint	Computes the WCS coordinates of the start point on the circle for which the parameter equals zero. The start point coincides with the end point.
	isClosed	Returns true if and only if this Curve object is closed.
	isPeriodic	Returns true if and only if this Curve object is periodic.
	isPlanar	Determines whether the circle entity is planar as a Boolean value and returns True. This method is inherited from the OdDbEntity class.
	normal	Returns the WCS unit vector which is the normal to the plane of the circle entity (DXF 210). The normal defines the orientation of the circle plane in world space.
	radius	Returns the radius of the circle entity (DXF 40).
	setCenter	Sets the center of the circle entity (DXF 10) in WCS. The initial value is (0,0,0) by default.
	setFromOdGeCurve	Takes an OdGeCurve3d and sets this OdDbCurve to be geometrically identical to the OdGeCurve3d.
	setNormal	Sets the WCS normal to the plane of the circle entity (DXF 210). The normal defines the orientation of the circle plane in world space. The initial value is (0,0,1) by default.
	setRadius	Sets the radius of the circle entity (DXF 40). The initial value is 0.0 by default.
	setThickness	Sets the thickness of the circle entity (DXF 39) in drawing units. Thickness is the extrusion length along the normal. A positive value extrudes along the normal. A negative value extrudes opposite from the normal. A zero value defines a circle without thickness. The initial value is zero by default.
	subGetClassID	overridables
	subGetTransformedCopy	This is subGetTransformedCopy, a member of class OdDbCircle.
	subTransformBy	This is subTransformBy, a member of class OdDbCircle.
	subWorldDraw	This is subWorldDraw, a member of class OdDbCircle.
	TD_USING	This is the overview for the TD_USING method overload.
	thickness	Returns the thickness of the circle entity (DXF 39) in drawing units. Thickness is the extrusion length along the normal. A positive value defines the thickness to be drawn along the normal direction. A negative value defines the thickness to be drawn in the opposite direction from the normal. A zero value defines a circle without thickness.

Send feedback about this topic