Open CASCADE Technology
6.5.4
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Describes an infinite line.
A line is defined and positioned in space with an axis
(gp_Ax1 object) which gives it an origin and a unit vector.
The Geom_Line line is parameterized:
P (U) = O + U*Dir, where:
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#include <Geom_Line.hxx>
Public Member Functions | |
Geom_Line (const gp_Ax1 &A1) | |
Creates a line located in 3D space with the axis placement A1. The Location of A1 is the origin of the line. | |
Geom_Line (const gp_Lin &L) | |
Creates a line from a non transient line from package gp. | |
Geom_Line (const gp_Pnt &P, const gp_Dir &V) | |
Constructs a line passing through point P and parallel to vector V (P and V are, respectively, the origin and the unit vector of the positioning axis of the line). | |
void | SetLin (const gp_Lin &L) |
Set <me> so that <me> has the same geometric properties as L. | |
void | SetDirection (const gp_Dir &V) |
changes the direction of the line. | |
void | SetLocation (const gp_Pnt &P) |
changes the "Location" point (origin) of the line. | |
void | SetPosition (const gp_Ax1 &A1) |
changes the "Location" and a the "Direction" of <me>. | |
gp_Lin | Lin () const |
Returns non transient line from gp with the same geometric properties as <me> | |
const gp_Ax1 & | Position () const |
Returns the positioning axis of this line; this is also its local coordinate system. | |
void | Reverse () |
Changes the orientation of this line. As a result, the unit vector of the positioning axis of this line is reversed. | |
Standard_Real | ReversedParameter (const Standard_Real U) const |
Computes the parameter on the reversed line for the point of parameter U on this line. For a line, the returned value is -U. | |
Standard_Real | FirstParameter () const |
Returns the value of the first parameter of this line. This is Standard_Real::RealFirst(). | |
Standard_Real | LastParameter () const |
Returns the value of the last parameter of this line. This is Standard_Real::RealLast(). | |
Standard_Boolean | IsClosed () const |
returns False | |
Standard_Boolean | IsPeriodic () const |
returns False | |
GeomAbs_Shape | Continuity () const |
Returns GeomAbs_CN, which is the global continuity of any line. | |
Standard_Boolean | IsCN (const Standard_Integer N) const |
returns True. //! Raised if N < 0. | |
void | D0 (const Standard_Real U, gp_Pnt &P) const |
Returns in P the point of parameter U. P (U) = O + U * Dir where O is the "Location" point of the line and Dir the direction of the line. | |
void | D1 (const Standard_Real U, gp_Pnt &P, gp_Vec &V1) const |
Returns the point P of parameter u and the first derivative V1. | |
void | D2 (const Standard_Real U, gp_Pnt &P, gp_Vec &V1, gp_Vec &V2) const |
Returns the point P of parameter U, the first and second derivatives V1 and V2. V2 is a vector with null magnitude for a line. | |
void | D3 (const Standard_Real U, gp_Pnt &P, gp_Vec &V1, gp_Vec &V2, gp_Vec &V3) const |
V2 and V3 are vectors with null magnitude for a line. | |
gp_Vec | DN (const Standard_Real U, const Standard_Integer N) const |
The returned vector gives the value of the derivative for the order of derivation N. //! Raised if N < 1. | |
void | Transform (const gp_Trsf &T) |
Applies the transformation T to this line. | |
virtual Standard_Real | TransformedParameter (const Standard_Real U, const gp_Trsf &T) const |
Returns the parameter on the transformed curve for the transform of the point of parameter U on <me>. me->Transformed(T)->Value(me->TransformedParameter(U,T)) is the same point as me->Value(U).Transformed(T) This methods returns <U> * T.ScaleFactor() | |
virtual Standard_Real | ParametricTransformation (const gp_Trsf &T) const |
Returns a coefficient to compute the parameter on the transformed curve for the transform of the point on <me>. Transformed(T)->Value(U * ParametricTransformation(T)) is the same point as Value(U).Transformed(T) This methods returns T.ScaleFactor() | |
Handle_Geom_Geometry | Copy () const |
Creates a new object which is a copy of this line. |
Geom_Line::Geom_Line | ( | const gp_Ax1 & | A1 | ) |
Geom_Line::Geom_Line | ( | const gp_Lin & | L | ) |
Geom_Line::Geom_Line | ( | const gp_Pnt & | P, |
const gp_Dir & | V | ||
) |
GeomAbs_Shape Geom_Line::Continuity | ( | ) | const [virtual] |
Implements Geom_Curve.
Handle_Geom_Geometry Geom_Line::Copy | ( | ) | const [virtual] |
Implements Geom_Geometry.
void Geom_Line::D0 | ( | const Standard_Real | U, |
gp_Pnt & | P | ||
) | const [virtual] |
Implements Geom_Curve.
void Geom_Line::D1 | ( | const Standard_Real | U, |
gp_Pnt & | P, | ||
gp_Vec & | V1 | ||
) | const [virtual] |
Implements Geom_Curve.
void Geom_Line::D2 | ( | const Standard_Real | U, |
gp_Pnt & | P, | ||
gp_Vec & | V1, | ||
gp_Vec & | V2 | ||
) | const [virtual] |
Implements Geom_Curve.
void Geom_Line::D3 | ( | const Standard_Real | U, |
gp_Pnt & | P, | ||
gp_Vec & | V1, | ||
gp_Vec & | V2, | ||
gp_Vec & | V3 | ||
) | const [virtual] |
Implements Geom_Curve.
gp_Vec Geom_Line::DN | ( | const Standard_Real | U, |
const Standard_Integer | N | ||
) | const [virtual] |
Implements Geom_Curve.
Standard_Real Geom_Line::FirstParameter | ( | ) | const [virtual] |
Implements Geom_Curve.
Standard_Boolean Geom_Line::IsClosed | ( | ) | const [virtual] |
Implements Geom_Curve.
Standard_Boolean Geom_Line::IsCN | ( | const Standard_Integer | N | ) | const [virtual] |
Implements Geom_Curve.
Standard_Boolean Geom_Line::IsPeriodic | ( | ) | const [virtual] |
Implements Geom_Curve.
Standard_Real Geom_Line::LastParameter | ( | ) | const [virtual] |
Implements Geom_Curve.
gp_Lin Geom_Line::Lin | ( | ) | const |
virtual Standard_Real Geom_Line::ParametricTransformation | ( | const gp_Trsf & | T | ) | const [virtual] |
Reimplemented from Geom_Curve.
const gp_Ax1& Geom_Line::Position | ( | ) | const |
void Geom_Line::Reverse | ( | ) | [virtual] |
Implements Geom_Curve.
Standard_Real Geom_Line::ReversedParameter | ( | const Standard_Real | U | ) | const [virtual] |
Implements Geom_Curve.
void Geom_Line::SetDirection | ( | const gp_Dir & | V | ) |
void Geom_Line::SetLin | ( | const gp_Lin & | L | ) |
void Geom_Line::SetLocation | ( | const gp_Pnt & | P | ) |
void Geom_Line::SetPosition | ( | const gp_Ax1 & | A1 | ) |
void Geom_Line::Transform | ( | const gp_Trsf & | T | ) | [virtual] |
Implements Geom_Geometry.
virtual Standard_Real Geom_Line::TransformedParameter | ( | const Standard_Real | U, |
const gp_Trsf & | T | ||
) | const [virtual] |
Reimplemented from Geom_Curve.