gp Class Reference

The geometric processor package, called gp, provides an implementation of entities used : . for algebraic calculation such as "XYZ" coordinates, "Mat" matrix . for basis analytic geometry such as Transformations, point, vector, line, plane, axis placement, conics, and elementary surfaces. These entities are defined in 2d and 3d space. All the classes of this package are non-persistent. More...

#include <gp.hxx>

Static Public Member Functions
static Standard_Real	Resolution ()
	Method of package gp.
static const gp_Pnt &	Origin ()
	Identifies a Cartesian point with coordinates X = Y = Z = 0.0.0.
static const gp_Dir &	DX ()
	Returns a unit vector with the combination (1,0,0)
static const gp_Dir &	DY ()
	Returns a unit vector with the combination (0,1,0)
static const gp_Dir &	DZ ()
	Returns a unit vector with the combination (0,0,1)
static const gp_Ax1 &	OX ()
	Identifies an axis where its origin is Origin and its unit vector coordinates X = 1.0, Y = Z = 0.0.
static const gp_Ax1 &	OY ()
	Identifies an axis where its origin is Origin and its unit vector coordinates Y = 1.0, X = Z = 0.0.
static const gp_Ax1 &	OZ ()
	Identifies an axis where its origin is Origin and its unit vector coordinates Z = 1.0, Y = X = 0.0.
static const gp_Ax2 &	XOY ()
	Identifies a coordinate system where its origin is Origin, and its "main Direction" and "X Direction" coordinates Z = 1.0, X = Y =0.0 and X direction coordinates X = 1.0, Y = Z = 0.0.
static const gp_Ax2 &	ZOX ()
	Identifies a coordinate system where its origin is Origin, and its "main Direction" and "X Direction" coordinates Y = 1.0, X = Z =0.0 and X direction coordinates Z = 1.0, X = Y = 0.0.
static const gp_Ax2 &	YOZ ()
	Identifies a coordinate system where its origin is Origin, and its "main Direction" and "X Direction" coordinates X = 1.0, Z = Y =0.0 and X direction coordinates Y = 1.0, X = Z = 0.0 In 2D space.
static const gp_Pnt2d &	Origin2d ()
	Identifies a Cartesian point with coordinates X = Y = 0.0.
static const gp_Dir2d &	DX2d ()
	Returns a unit vector with the combinations (1,0)
static const gp_Dir2d &	DY2d ()
	Returns a unit vector with the combinations (0,1)
static const gp_Ax2d &	OX2d ()
	Identifies an axis where its origin is Origin2d and its unit vector coordinates are: X = 1.0, Y = 0.0.
static const gp_Ax2d &	OY2d ()
	Identifies an axis where its origin is Origin2d and its unit vector coordinates are Y = 1.0, X = 0.0.

Detailed Description

The geometric processor package, called gp, provides an implementation of entities used : . for algebraic calculation such as "XYZ" coordinates, "Mat" matrix . for basis analytic geometry such as Transformations, point, vector, line, plane, axis placement, conics, and elementary surfaces. These entities are defined in 2d and 3d space. All the classes of this package are non-persistent.

Member Function Documentation

DX()

static const gp_Dir & gp::DX ( )

static

Returns a unit vector with the combination (1,0,0)

DX2d()

static const gp_Dir2d & gp::DX2d ( )

static

Returns a unit vector with the combinations (1,0)

DY()

static const gp_Dir & gp::DY ( )

static

Returns a unit vector with the combination (0,1,0)

DY2d()

static const gp_Dir2d & gp::DY2d ( )

static

Returns a unit vector with the combinations (0,1)

DZ()

static const gp_Dir & gp::DZ ( )

static

Returns a unit vector with the combination (0,0,1)

Origin()

static const gp_Pnt & gp::Origin ( )

static

Identifies a Cartesian point with coordinates X = Y = Z = 0.0.0.

Origin2d()

static const gp_Pnt2d & gp::Origin2d ( )

static

Identifies a Cartesian point with coordinates X = Y = 0.0.

OX()

static const gp_Ax1 & gp::OX ( )

static

Identifies an axis where its origin is Origin and its unit vector coordinates X = 1.0, Y = Z = 0.0.

OX2d()

static const gp_Ax2d & gp::OX2d ( )

static

Identifies an axis where its origin is Origin2d and its unit vector coordinates are: X = 1.0, Y = 0.0.

OY()

static const gp_Ax1 & gp::OY ( )

static

Identifies an axis where its origin is Origin and its unit vector coordinates Y = 1.0, X = Z = 0.0.

OY2d()

static const gp_Ax2d & gp::OY2d ( )

static

Identifies an axis where its origin is Origin2d and its unit vector coordinates are Y = 1.0, X = 0.0.

OZ()

static const gp_Ax1 & gp::OZ ( )

static

Identifies an axis where its origin is Origin and its unit vector coordinates Z = 1.0, Y = X = 0.0.

Resolution()

static Standard_Real gp::Resolution ( )

inlinestatic

Method of package gp.

In geometric computations, defines the tolerance criterion used to determine when two numbers can be considered equal. Many class functions use this tolerance criterion, for example, to avoid division by zero in geometric computations. In the documentation, tolerance criterion is always referred to as gp::Resolution().

XOY()

static const gp_Ax2 & gp::XOY ( )

static

Identifies a coordinate system where its origin is Origin, and its "main Direction" and "X Direction" coordinates Z = 1.0, X = Y =0.0 and X direction coordinates X = 1.0, Y = Z = 0.0.

YOZ()

static const gp_Ax2 & gp::YOZ ( )

static

Identifies a coordinate system where its origin is Origin, and its "main Direction" and "X Direction" coordinates X = 1.0, Z = Y =0.0 and X direction coordinates Y = 1.0, X = Z = 0.0 In 2D space.

ZOX()

static const gp_Ax2 & gp::ZOX ( )

static

Identifies a coordinate system where its origin is Origin, and its "main Direction" and "X Direction" coordinates Y = 1.0, X = Z =0.0 and X direction coordinates Z = 1.0, X = Y = 0.0.

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The documentation for this class was generated from the following file:

• gp.hxx