OdDbPolyline Class

Class Hierarchy

Syntax

C++

class OdDbPolyline : public OdDbCurve;

File

DbPolyline.h

Description

This class represents Lightweight Polyline entities in an OdDbDatabase instance.

OdDbPolyline entities differ from OdDb2dPolyline entities as follows:

OdDbPolyline entities are stored as single objects, thereby improving performance and reducing overhead compared to OdDb2DPolyline objects.
Curve fitting and Spline fitting of OdDbPolyline entities are not supported.

Remarks

The number of vertices in an OdDbPolyline must be at least two. Polylines with less than two vertices should not left in or added to the database.

Since the nth Segment of a Polyline is the segment following the nth Vertex, the segment index and vertex index may be used interchangeably.

Group

OdDb Classes

Public Methods

	Name	Description
	OdDbPolyline

OdDbPolyline Enumerations

	Name	Description
	SegType

OdDbPolyline Methods

	Name	Description
	addVertexAt	Inserts a vertex into this Polyline entity at the specified index.
	convertFrom	Fills this OdDbPolyline entity with data from the specified OdDb2dPolyline entity.
	convertTo	Fills the specified OdDb2dPolyline with data from this OdDbPolyline entity.
	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.
	elevation	Returns the elevation of this entity in the OCS (DXF 30).
	explodeGeometry	Explodes this entity into a set of simpler entities.
	getArcSegAt	This is the overview for the getArcSegAt method overload.
	getArea	Returns the area of this Curve object.
	getBulgeAt	Returns the bulge of the specified segment of this Polyline entity.
	getConstantWidth	Returns the constant width for this Polyline entity (DXF 43).
	getDistAtParam	Returns the distance along this Curve object from its start point to the point specified by param.
	getEcs	Returns the entity coordinate system matrix.
	getEndParam	Returns the parameter corresponding to the end point of this Curve object.
	getEndPoint	Returns the WCS end point of this Curve object.
	getFirstDeriv	Returns the first derivative of this Curve object at the specified WCS point.
	getLineSegAt	This is the overview for the getLineSegAt method overload.
	getOdGeCurve	Returns an OdGeCurve3d that is geometrically identical to this OdDbCurve.
	getParamAtDist	Returns the parameter corresponding to the point a specified distance along this Curve object from its start point.
	getParamAtPoint	Returns the parameter corresponding to the specified WCS point on this Curve object.
	getPlane	Returns the plane that contains this entity.
	getPointAt	This is the overview for the getPointAt method overload.
	getPointAtParam	Returns the WCS point on this Curve object corresponding to the specified parameter.
	getSecondDeriv	Returns the second derivative of this Curve object at the specified point.
	getStartParam	Returns the parameter corresponding to the start point of this Curve object.
	getStartPoint	Returns the WCS start point of this Curve object.
	getVertexIdentifierAt	Returns the vertex identifier of the specified segment of this Polyline entity.
	getWidthsAt	Returns the start and end widths for the specified segment of this Polyline entity.
	hasBulges	Returns true if and only if any of the segments in this Polyline entity have non-zero bulges.
	hasPlinegen	Returns true if and only if linetype generation is on for this Polyline entity (DXF 70, bit 0x80).
	hasVertexIdentifiers	Returns true if and only if any of the segments in this Polyline entity have non-zero vertex identifiers.
	hasWidth	Returns true if and only if any of the segments in this Polyline entity have start and end widths.
	isClosed	Returns true if and only if this Curve object is closed.
	isOnlyLines	Returns true if and only if this Polyline entity consists solely of line segments.
	isPeriodic	Returns true if and only if this Curve object is periodic.
	isPlanar	Returns true if and only if this entity is planar.
	maximizeMemory	Decompresses this Polyline entity to expedite modifications.
	minimizeMemory	Compresses this Polyline entity.
	normal	Returns the WCS normal to the plane of this entity (DXF 210).
	numVerts	Returns the number of vertices in this Polyline entity (DXF 90).
	onSegAt	Returns true if and only if the specified OCS point is on the specified segment of this Polyline entity, and returns the parameter of that point on the segment.
	removeVertexAt	Removes the specified vertex from this Polyline entity.
	reset	Resets the vertex data for this Polyline entity.
	reverseCurve	Reverses this curve entity so the start becomes the end, and vice versa.
	segType	Returns the type of the specified segment of this Polyline entity.
	setBulgeAt	Sets the bulge of the specified segment of this Polyline entity.
	setClosed	Controls the closed state for this Polyline entity (DXF 70, bit 0x01=1).
	setConstantWidth	Sets this Polyline entity to a constant width (DXF 43).
	setElevation	Sets the elevation of this entity in the OCS (DXF 38).
	setFromOdGeCurve	Takes an OdGeCurve3d and sets this OdDbCurve to be geometrically identical to the OdGeCurve3d.
	setNormal	Sets the WCS normal to the plane of this entity (DXF 210).
	setPlinegen	Controls the linetype generation for this Polyline entity (DXF 70, bit 0x80).
	setPointAt	Sets the OCS point for the specified vertex of this Polyline entity.
	setThickness	Sets the thickness of this entity (DXF 39).
	setVertexIdentifierAt	Sets the vertex identifier of the specified segment of this Polyline entity.
	setWidthsAt	Sets the start and end widths for the specified segment of this Polyline entity.
	subExplode
	subGetClassID	overridables
	subGetGsMarkersAtSubentPath
	subGetSubentPathsAtGsMarker
	subGetTransformedCopy
	subSubentPtr
	subTransformBy
	subViewportDraw
	subWorldDraw
	TD_USING	This is the overview for the TD_USING method overload.
	thickness	Returns the thickness of this entity (DXF 39).

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