OdDbLine Class

Class Hierarchy

Syntax

C++

class OdDbLine : public OdDbCurve;

File

DbLine.h

Description

This class implements the line object (Line entity) in the database. This class inherits the base functionality of entities. A line is a straight segment in world space.

See Also

Example of Working with the Line Object

Working with Lines

OdDbXline, OdDbRay, OdDbMline classes

Group

OdDb Classes

Public Methods

	Name	Description
	OdDbLine	Builds an instance of the line object.

OdDbLine Methods

	Name	Description
	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.
	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.
	endPoint	Returns the WCS coordinates of the end point of the line (DXF 11) as three-dimensional point instance.
	getArea	Returns a zero for the line entity.
	getDistAtParam	Computes the distance along the line measured from the start point in drawing units at the specified parameter.
	getEcs	Returns the entity coordinate system matrix.
	getEndParam	Gets the end parameter value. The end parameter equals the line length. Parameter is a distance measured from the start point in drawing units.
	getEndPoint	Computes the WCS coordinates of the end point on the line for which the parameter equals the line length.
	getFirstDeriv	Computes the first derivative for the specified parameter of the line entity and returns the three-dimensional vector instance. The first derivative is constant for any point of the line.
	getOdGeCurve	Returns an OdGeCurve3d that is geometrically identical to this OdDbCurve.
	getParamAtDist	Computes the parameter at the distance along the line. Parameter is a distance measured from the start point in drawing units.
	getParamAtPoint	Computes the parameter at the point placed on the line. Parameter is a distance measured from the start point in drawing units.
	getPlane	Gets an arbitrary plane passed through the line entity. This method is inherited from the OdDbEntity class.
	getPointAtParam	Computes the WCS coordinates of the point on the line at the specified parameter value. Parameter is a distance measured from the start point in drawing units.
	getSecondDeriv	Computes the second derivative for the specified parameter of the line entity and returns the three-dimensional vector instance. The second derivative is constant for any point of the line.
	getStartParam	Gets the start parameter value. The start parameter equals a zero for lines. Parameter is a distance measured from the start point in drawing units.
	getStartPoint	Computes the WCS coordinates of the start point on the line for which the parameter equals zero.
	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 line 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 line entity (DXF 210). The normal defines the orientation of the line plane in world space.
	reverseCurve	Reverses this curve entity so the start becomes the end, and vice versa.
	setEndPoint	Sets the end point of the line (DXF 11) 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 line entity (DXF 210). The normal defines the orientation of the line plane in world space. The initial value is (0,0,1) by default.
	setStartPoint	Sets the start point of the line (DXF 10) in WCS. The initial value is (0,0,0) by default.
	setThickness	Sets the thickness of the line 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 line without thickness. The initial value is zero by default.
	startPoint	Returns the WCS coordinates of the start point of the line (DXF 10) as three-dimensional point instance.
	subGetClassID	overridables
	subGetGeomExtents
	subTransformBy
	subWorldDraw
	TD_USING	This is the overview for the TD_USING method overload.
	thickness	Returns the thickness of the line 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 line without thickness.

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