OdGeCylinder Class

Class Hierarchy

Syntax

C++

class OdGeCylinder : public OdGeSurface;

File

GeCylinder.h

Description

This class represents right circular cylinders.

Remarks

A right circular cylinder is defined by its

radius
axis of symmetry
origin (a point on the axis)
U parameter scale.

It is generated by revolving a line parallel to the axis of symmetry, at a the radius distance.

The height interval of this cylinder is specified relative to its origin. Height is increasing in the direction of the symmetric axis. Height interval can be unbounded.

The cylinder is parameterized as follows:

Parameter V is the angle of revolution measured from the refAxis (an axis perpendicular to the axis of symmetry). For a closed cylinder, it defaults to [-OdaPI, OdaPI). The right hand rule applied along the direction of the axis of symmetry defines the positive direction of V. The surface is periodic in V with a period of Oda2PI.

Parameter U varies along the generating line. U is dimensionless, measured in U parameter scale (which equals to the radius by default). U increases in the direction of the axis of symmetry. However, if U parameter scale is negative, U decreases in the direction of the axis of symmetry. U = 0 corresponds to the base of this cylinder.

[umin, umax] x [vmin, vmax] defines a four sided cylindrical patch bounded by two straight lines (at vmin and vmax), and two circular arcs (at umin and umax). The following constraints apply to the definition of a cylindrical patch:

umin < umax
|vmax - vmin| <= Oda2PI.
radius > 0.0

Corresponding C++ library: TD_Ge

See Also

Working with Cylinders

Group

OdGe Classes

Public Methods

	Name	Description
	OdGeCylinder	This is the overview for the OdGeCylinder constructor overload.

OdGeCylinder Methods

	Name	Description
	axisOfSymmetry	Returns the axis of symmetry of this cylinder.
	getAngles	Retrieves the starting and ending angles of this cylinder.
	getHeight	Retrieves the interval of the axis of symmetry.
	getUParamScale	Retrieves U parameter scale.
	heightAt	Returns the height of this cylinder corresponding to the specified position on the U-axis.
	intersectWith	Checks if this cylinder intersects with a line entity, and retrieves the number of intersections and the points of intersection.
	isClosed	Checks if the base of this cylinder is a full circle within the specified tolerance.
	isOuterNormal	Checks if the normal to this surface is pointing outward.
	origin	Returns the origin of this cylinder.
	radius	Returns the radius of this cylinder.
	refAxis	Returns the reference axis of this cylinder.
	set	This is the overview for the set method overload.
	setAngles	Sets the starting and ending angles of this cylinder.
	setHeight	Sets the height interval of this cylinder.
	setIsOuterNormal	Sets if the cylinder normal is pointing outward.
	setRadius	Sets the radius of this cylinder.
	setUParamScale	Sets U parameter scale according to the parameter.

OdGeCylinder Operators

	Name	Description
	=	Assignment operator for the OdGeCylinder object.

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