Open CASCADE Technology  6.5.4
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Public Member Functions
gp_Lin Class Reference

Describes a line in 3D space.
A line is positioned in space with an axis (a gp_Ax1
object) which gives it an origin and a unit vector.
A line and an axis are similar objects, thus, we can
convert one into the other. A line provides direct access
to the majority of the edit and query functions available
on its positioning axis. In addition, however, a line has
specific functions for computing distances and positions.
See Also
gce_MakeLin which provides functions for more complex
line constructions
Geom_Line which provides additional functions for
constructing lines and works, in particular, with the
parametric equations of lines

#include <gp_Lin.hxx>

Public Member Functions

DEFINE_STANDARD_ALLOC gp_Lin ()
 Creates a Line corresponding to Z axis of the
reference coordinate system.

 gp_Lin (const gp_Ax1 &A1)
 Creates a line defined by axis A1.

 gp_Lin (const gp_Pnt &P, const gp_Dir &V)
 Creates 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 Reverse ()
gp_Lin Reversed () const
 Reverses the direction of the line.
Note:

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)
 Complete redefinition of the line.
The "Location" point of <A1> is the origin of the line.
The "Direction" of <A1> is the direction of the line.

const gp_DirDirection () const
 Returns the direction of the line.

const gp_PntLocation () const
 Returns the location point (origin) of the line.

const gp_Ax1Position () const
 Returns the axis placement one axis whith the same
location and direction as <me>.

Standard_Real Angle (const gp_Lin &Other) const
 Computes the angle between two lines in radians.

Standard_Boolean Contains (const gp_Pnt &P, const Standard_Real LinearTolerance) const
 Returns true if this line contains the point P, that is, if the
distance between point P and this line is less than or
equal to LinearTolerance..

Standard_Real Distance (const gp_Pnt &P) const
 Computes the distance between <me> and the point P.

Standard_Real Distance (const gp_Lin &Other) const
 Computes the distance between two lines.

Standard_Real SquareDistance (const gp_Pnt &P) const
 Computes the square distance between <me> and the point P.

Standard_Real SquareDistance (const gp_Lin &Other) const
 Computes the square distance between two lines.

gp_Lin Normal (const gp_Pnt &P) const
 Computes the line normal to the direction of <me>, passing
through the point P. Raises ConstructionError
if the distance between <me> and the point P is lower
or equal to Resolution from gp because there is an infinity of
solutions in 3D space.

void Mirror (const gp_Pnt &P)
gp_Lin Mirrored (const gp_Pnt &P) const
 Performs the symmetrical transformation of a line
with respect to the point P which is the center of
the symmetry.

void Mirror (const gp_Ax1 &A1)
gp_Lin Mirrored (const gp_Ax1 &A1) const
 Performs the symmetrical transformation of a line
with respect to an axis placement which is the axis
of the symmetry.

void Mirror (const gp_Ax2 &A2)
gp_Lin Mirrored (const gp_Ax2 &A2) const
 Performs the symmetrical transformation of a line
with respect to a plane. The axis placement <A2>
locates the plane of the symmetry :
(Location, XDirection, YDirection).

void Rotate (const gp_Ax1 &A1, const Standard_Real Ang)
gp_Lin Rotated (const gp_Ax1 &A1, const Standard_Real Ang) const
 Rotates a line. A1 is the axis of the rotation.
Ang is the angular value of the rotation in radians.

void Scale (const gp_Pnt &P, const Standard_Real S)
gp_Lin Scaled (const gp_Pnt &P, const Standard_Real S) const
 Scales a line. S is the scaling value.
The "Location" point (origin) of the line is modified.
The "Direction" is reversed if the scale is negative.

void Transform (const gp_Trsf &T)
gp_Lin Transformed (const gp_Trsf &T) const
 Transforms a line with the transformation T from class Trsf.

void Translate (const gp_Vec &V)
gp_Lin Translated (const gp_Vec &V) const
 Translates a line in the direction of the vector V.
The magnitude of the translation is the vector's magnitude.

void Translate (const gp_Pnt &P1, const gp_Pnt &P2)
gp_Lin Translated (const gp_Pnt &P1, const gp_Pnt &P2) const
 Translates a line from the point P1 to the point P2.

const gp_Ax1_CSFDB_Getgp_Linpos () const

Constructor & Destructor Documentation

gp_Lin::gp_Lin ( const gp_Pnt P,
const gp_Dir V 
)

Member Function Documentation

Standard_Boolean gp_Lin::Contains ( const gp_Pnt P,
const Standard_Real  LinearTolerance 
) const
  • Reverse assigns the result to this line, while
  • Reversed creates a new one.
gp_Lin gp_Lin::Translated ( const gp_Pnt P1,
const gp_Pnt P2 
) const

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