Open CASCADE Technology 6.6.0
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This class computes a distribution of points on a
curve. The points may respect the deflection. The algorithm
is not based on the classical prediction (with second
derivative of curve), but either on the evaluation of
the distance between the mid point and the point of
mid parameter of the two points, or the distance
between the mid point and the point at parameter 0.5
on the cubic interpolation of the two points and their
tangents.
Note: this algorithm is faster than a
GCPnts_UniformDeflection algorithm, and is
able to work with non-"C2" continuous curves.
However, it generates more points in the distribution.
#include <GCPnts_QuasiUniformDeflection.hxx>
Public Member Functions | |
GCPnts_QuasiUniformDeflection () | |
Constructs an empty algorithm. To define the problem to be solved, use the function Initialize. | |
GCPnts_QuasiUniformDeflection (Adaptor3d_Curve &C, const Standard_Real Deflection, const GeomAbs_Shape Continuity=GeomAbs_C1) | |
Computes a QuasiUniform Deflection distribution of points on the Curve . | |
GCPnts_QuasiUniformDeflection (Adaptor2d_Curve2d &C, const Standard_Real Deflection, const GeomAbs_Shape Continuity=GeomAbs_C1) | |
Computes a QuasiUniform Deflection distribution of points on the Curve . | |
GCPnts_QuasiUniformDeflection (Adaptor3d_Curve &C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const GeomAbs_Shape Continuity=GeomAbs_C1) | |
Computes a QuasiUniform Deflection distribution of points on a part of the Curve . | |
GCPnts_QuasiUniformDeflection (Adaptor2d_Curve2d &C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const GeomAbs_Shape Continuity=GeomAbs_C1) | |
Computes a QuasiUniform Deflection distribution of points on a part of the Curve . | |
void | Initialize (Adaptor3d_Curve &C, const Standard_Real Deflection, const GeomAbs_Shape Continuity=GeomAbs_C1) |
Initialize the algoritms with , <Deflection> | |
void | Initialize (Adaptor2d_Curve2d &C, const Standard_Real Deflection, const GeomAbs_Shape Continuity=GeomAbs_C1) |
Initialize the algoritms with , <Deflection> | |
void | Initialize (Adaptor3d_Curve &C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const GeomAbs_Shape Continuity=GeomAbs_C1) |
Initialize the algoritms with , <Deflection>, | |
void | Initialize (Adaptor2d_Curve2d &C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const GeomAbs_Shape Continuity=GeomAbs_C1) |
Initialize the algoritms with , <Deflection>, | |
Standard_Boolean | IsDone () const |
Returns true if the computation was successful. IsDone is a protection against: | |
Standard_Integer | NbPoints () const |
Returns the number of points of the distribution computed by this algorithm. Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful. | |
Standard_Real | Parameter (const Standard_Integer Index) const |
Returns the parameter of the point of index Index in the distribution computed by this algorithm. Warning Index must be greater than or equal to 1, and less than or equal to the number of points of the distribution. However, pay particular attention as this condition is not checked by this function. Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful. | |
gp_Pnt | Value (const Standard_Integer Index) const |
Returns the point of index Index in the distribution computed by this algorithm. Warning Index must be greater than or equal to 1, and less than or equal to the number of points of the distribution. However, pay particular attention as this condition is not checked by this function. Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful. | |
Standard_Real | Deflection () const |
Returns the deflection between the curve and the polygon resulting from the points of the distribution computed by this algorithm. This is the value given to the algorithm at the time of construction (or initialization). Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful. |
GCPnts_QuasiUniformDeflection::GCPnts_QuasiUniformDeflection | ( | ) |
GCPnts_QuasiUniformDeflection::GCPnts_QuasiUniformDeflection | ( | Adaptor3d_Curve & | C, |
const Standard_Real | Deflection, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
GCPnts_QuasiUniformDeflection::GCPnts_QuasiUniformDeflection | ( | Adaptor2d_Curve2d & | C, |
const Standard_Real | Deflection, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
GCPnts_QuasiUniformDeflection::GCPnts_QuasiUniformDeflection | ( | Adaptor3d_Curve & | C, |
const Standard_Real | Deflection, | ||
const Standard_Real | U1, | ||
const Standard_Real | U2, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
GCPnts_QuasiUniformDeflection::GCPnts_QuasiUniformDeflection | ( | Adaptor2d_Curve2d & | C, |
const Standard_Real | Deflection, | ||
const Standard_Real | U1, | ||
const Standard_Real | U2, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
Standard_Real GCPnts_QuasiUniformDeflection::Deflection | ( | ) | const |
void GCPnts_QuasiUniformDeflection::Initialize | ( | Adaptor2d_Curve2d & | C, |
const Standard_Real | Deflection, | ||
const Standard_Real | U1, | ||
const Standard_Real | U2, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
-- <U1>,<U2>
This and the above algorithms initialize (or reinitialize)
this algorithm and compute a distribution of points:
void GCPnts_QuasiUniformDeflection::Initialize | ( | Adaptor3d_Curve & | C, |
const Standard_Real | Deflection, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
void GCPnts_QuasiUniformDeflection::Initialize | ( | Adaptor2d_Curve2d & | C, |
const Standard_Real | Deflection, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
void GCPnts_QuasiUniformDeflection::Initialize | ( | Adaptor3d_Curve & | C, |
const Standard_Real | Deflection, | ||
const Standard_Real | U1, | ||
const Standard_Real | U2, | ||
const GeomAbs_Shape | Continuity = GeomAbs_C1 |
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) |
Standard_Boolean GCPnts_QuasiUniformDeflection::IsDone | ( | ) | const |
Standard_Integer GCPnts_QuasiUniformDeflection::NbPoints | ( | ) | const |
Standard_Real GCPnts_QuasiUniformDeflection::Parameter | ( | const Standard_Integer | Index | ) | const |
gp_Pnt GCPnts_QuasiUniformDeflection::Value | ( | const Standard_Integer | Index | ) | const |