OdDbXline Class

Class Hierarchy

Syntax

C++

class OdDbXline : public OdDbCurve;

File

DbXline.h

Description

This class implements the Xline object (Infinity Line entity) in the database. This class inherits the base functionality of entities. It is used as a construction line passed through a point.

Working with Infinite Lines

OdDbRay, OdDbLine classes

Group

OdDb Classes

Public Methods

	Name	Description
	OdDbXline	Builds an instance of the Xline object.

OdDbXline Methods

	Name	Description
	basePoint	Returns the WCS coordinates of the base point through which the inifinity line passes (DXF 10) as three-dimensional point instance.
	dwgInFields	Reads the .dwg file data of this object.
	DWGMAP_DECLARE_MEMBERS
	dwgOutFields	Writes the .dwg file data of this object.
	dxfInFields	Reads the DXF data of this object.
	dxfOutFields	Writes the DXF data of this object.
	getArea	This method is not applicable for the infinity line entity.
	getDistAtParam	Computes the distance along the infinite line measured from the base point in drawing units at the specified parameter.
	getEndParam	This method is not applicable for the infinity line entity.
	getEndPoint	This method is not applicable for the infinity line entity.
	getFirstDeriv	Computes the first derivative for the specified parameter of the infinity line entity and returns the three-dimensional vector instance. The first derivative is constant for any point of the infinite line.
	getOdGeCurve	Returns an OdGeCurve3d that is geometrically identical to this OdDbCurve.
	getParamAtDist	Computes the parameter at the distance along the infinite line measured from the base point.
	getParamAtPoint	Computes the parameter at the point placed on the infinite line.
	getPlane	Gets an arbitrary plane passed through the infinity line entity. This method is inherited from the OdDbEntity class.
	getPointAtParam	Computes the WCS coordinates of the point on the infinity line at the specified parameter value.
	getSecondDeriv	Computes the second derivative for the specified parameter of the infinity line entity and returns the three-dimensional vector instance. The second derivative has (0,0,0) coordinates for any point of the infinite line.
	getStartParam	This method is not applicable for the infinity line entity.
	getStartPoint	This method is not applicable for the infinity line entity.
	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 infinity line entity is planar as a Boolean value and returns True. This method is inherited from the OdDbEntity class.
	setBasePoint	Sets the base point of the infinity line (DXF 10). The initial value is (0,0,0) by default.
	setFromOdGeCurve	Takes an OdGeCurve3d and sets this OdDbCurve to be geometrically identical to the OdGeCurve3d.
	setUnitDir	Sets the unit direction vector of the infinity line (DXF 11) in WCS. The initial value is (0,0,1) by default.
	subGetClassID	overridables
	subGetGeomExtents
	subTransformBy
	subWorldDraw
	TD_USING	This is the overview for the TD_USING method overload.
	unitDir	Returns the WCS unit direction vector of the infinity line (DXF 11) as three-dimensional vector instance. This vector orients the infinity line in would space.

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