Open CASCADE Technology
7.7.0

Describes a line in 2D space. A line is positioned in the plane with an axis (a gp_Ax2d object) which gives the line its origin and 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 GccAna and Geom2dGcc packages which provide functions for constructing lines defined by geometric constraints gce_MakeLin2d which provides functions for more complex line constructions Geom2d_Line which provides additional functions for constructing lines and works, in particular, with the parametric equations of lines. More...
#include <gp_Lin2d.hxx>
Public Member Functions  
gp_Lin2d ()  
Creates a Line corresponding to X axis of the reference coordinate system. More...  
gp_Lin2d (const gp_Ax2d &theA)  
Creates a line located with theA. More...  
gp_Lin2d (const gp_Pnt2d &theP, const gp_Dir2d &theV)  
<theP> is the location point (origin) of the line and <theV> is the direction of the line. More...  
gp_Lin2d (const Standard_Real theA, const Standard_Real theB, const Standard_Real theC)  
Creates the line from the equation theA*X + theB*Y + theC = 0.0 Raises ConstructionError if Sqrt(theA*theA + theB*theB) <= Resolution from gp. Raised if Sqrt(theA*theA + theB*theB) <= Resolution from gp. More...  
void  Reverse () 
gp_Lin2d  Reversed () const 
Reverses the positioning axis of this line. Note: More...  
void  SetDirection (const gp_Dir2d &theV) 
Changes the direction of the line. More...  
void  SetLocation (const gp_Pnt2d &theP) 
Changes the origin of the line. More...  
void  SetPosition (const gp_Ax2d &theA) 
Complete redefinition of the line. The "Location" point of <theA> is the origin of the line. The "Direction" of <theA> is the direction of the line. More...  
void  Coefficients (Standard_Real &theA, Standard_Real &theB, Standard_Real &theC) const 
Returns the normalized coefficients of the line : theA * X + theB * Y + theC = 0. More...  
const gp_Dir2d &  Direction () const 
Returns the direction of the line. More...  
const gp_Pnt2d &  Location () const 
Returns the location point (origin) of the line. More...  
const gp_Ax2d &  Position () const 
Returns the axis placement one axis with the same location and direction as <me>. More...  
Standard_Real  Angle (const gp_Lin2d &theOther) const 
Computes the angle between two lines in radians. More...  
Standard_Boolean  Contains (const gp_Pnt2d &theP, const Standard_Real theLinearTolerance) const 
Returns true if this line contains the point theP, that is, if the distance between point theP and this line is less than or equal to theLinearTolerance. More...  
Standard_Real  Distance (const gp_Pnt2d &theP) const 
Computes the distance between <me> and the point <theP>. More...  
Standard_Real  Distance (const gp_Lin2d &theOther) const 
Computes the distance between two lines. More...  
Standard_Real  SquareDistance (const gp_Pnt2d &theP) const 
Computes the square distance between <me> and the point <theP>. More...  
Standard_Real  SquareDistance (const gp_Lin2d &theOther) const 
Computes the square distance between two lines. More...  
gp_Lin2d  Normal (const gp_Pnt2d &theP) const 
Computes the line normal to the direction of <me>, passing through the point <theP>. More...  
void  Mirror (const gp_Pnt2d &theP) 
gp_Lin2d  Mirrored (const gp_Pnt2d &theP) const 
Performs the symmetrical transformation of a line with respect to the point <theP> which is the center of the symmetry. More...  
void  Mirror (const gp_Ax2d &theA) 
gp_Lin2d  Mirrored (const gp_Ax2d &theA) const 
Performs the symmetrical transformation of a line with respect to an axis placement which is the axis of the symmetry. More...  
void  Rotate (const gp_Pnt2d &theP, const Standard_Real theAng) 
gp_Lin2d  Rotated (const gp_Pnt2d &theP, const Standard_Real theAng) const 
Rotates a line. theP is the center of the rotation. theAng is the angular value of the rotation in radians. More...  
void  Scale (const gp_Pnt2d &theP, const Standard_Real theS) 
gp_Lin2d  Scaled (const gp_Pnt2d &theP, const Standard_Real theS) const 
Scales a line. theS is the scaling value. Only the origin of the line is modified. More...  
void  Transform (const gp_Trsf2d &theT) 
gp_Lin2d  Transformed (const gp_Trsf2d &theT) const 
Transforms a line with the transformation theT from class Trsf2d. More...  
void  Translate (const gp_Vec2d &theV) 
gp_Lin2d  Translated (const gp_Vec2d &theV) const 
Translates a line in the direction of the vector theV. The magnitude of the translation is the vector's magnitude. More...  
void  Translate (const gp_Pnt2d &theP1, const gp_Pnt2d &theP2) 
gp_Lin2d  Translated (const gp_Pnt2d &theP1, const gp_Pnt2d &theP2) const 
Translates a line from the point theP1 to the point theP2. More...  
Describes a line in 2D space. A line is positioned in the plane with an axis (a gp_Ax2d object) which gives the line its origin and 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 GccAna and Geom2dGcc packages which provide functions for constructing lines defined by geometric constraints gce_MakeLin2d which provides functions for more complex line constructions Geom2d_Line which provides additional functions for constructing lines and works, in particular, with the parametric equations of lines.

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Creates a Line corresponding to X axis of the reference coordinate system.

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Creates a line located with theA.
<theP> is the location point (origin) of the line and <theV> is the direction of the line.
gp_Lin2d::gp_Lin2d  (  const Standard_Real  theA, 
const Standard_Real  theB,  
const Standard_Real  theC  
) 
Creates the line from the equation theA*X + theB*Y + theC = 0.0 Raises ConstructionError if Sqrt(theA*theA + theB*theB) <= Resolution from gp. Raised if Sqrt(theA*theA + theB*theB) <= Resolution from gp.

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Computes the angle between two lines in radians.

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Returns the normalized coefficients of the line : theA * X + theB * Y + theC = 0.

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Returns true if this line contains the point theP, that is, if the distance between point theP and this line is less than or equal to theLinearTolerance.

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Returns the direction of the line.

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Computes the distance between two lines.

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Computes the distance between <me> and the point <theP>.

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Returns the location point (origin) of the line.
void gp_Lin2d::Mirror  (  const gp_Ax2d &  theA  ) 
void gp_Lin2d::Mirror  (  const gp_Pnt2d &  theP  ) 
Performs the symmetrical transformation of a line with respect to an axis placement which is the axis of the symmetry.
Performs the symmetrical transformation of a line with respect to the point <theP> which is the center of the symmetry.
Computes the line normal to the direction of <me>, passing through the point <theP>.

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Returns the axis placement one axis with the same location and direction as <me>.

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Reverses the positioning axis of this line. Note:

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Rotates a line. theP is the center of the rotation. theAng is the angular value of the rotation in radians.

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Scales a line. theS is the scaling value. Only the origin of the line is modified.

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Changes the direction of the line.

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Changes the origin of the line.

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

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Computes the square distance between two lines.

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Computes the square distance between <me> and the point <theP>.

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Transforms a line with the transformation theT from class Trsf2d.

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Translates a line from the point theP1 to the point theP2.
Translates a line in the direction of the vector theV. The magnitude of the translation is the vector's magnitude.