This algorithm converts a circle into a rational B-spline curve. The circle is a Circ2d from package gp and its parametrization is : P (U) = Loc + R * (Cos(U) * Xdir + Sin(U) * YDir) where Loc is the center of the circle Xdir and Ydir are the normalized directions of the local cartesian coordinate system of the circle. The parametrization range for the circle is U [0, 2Pi]. More...
#include <Convert_CircleToBSplineCurve.hxx>
Public Member Functions | |
| Convert_CircleToBSplineCurve (const gp_Circ2d &C, const Convert_ParameterisationType Parameterisation=Convert_TgtThetaOver2) | |
| The equivalent B-spline curve has the same orientation as the circle C. More... | |
| Convert_CircleToBSplineCurve (const gp_Circ2d &C, const Standard_Real U1, const Standard_Real U2, const Convert_ParameterisationType Parameterisation=Convert_TgtThetaOver2) | |
| The circle C is limited between the parametric values U1, U2 in radians. U1 and U2 [0.0, 2*Pi] . The equivalent B-spline curve is oriented from U1 to U2 and has the same orientation as the circle C. More... | |
 Public Member Functions inherited from Convert_ConicToBSplineCurve | |
| Standard_Integer | Degree () const |
| Returns the degree of the BSpline curve whose data is computed in this framework. More... | |
| Standard_Integer | NbPoles () const |
| Returns the number of poles of the BSpline curve whose data is computed in this framework. More... | |
| Standard_Integer | NbKnots () const |
| Returns the number of knots of the BSpline curve whose data is computed in this framework. More... | |
| Standard_Boolean | IsPeriodic () const |
| Returns true if the BSpline curve whose data is computed in this framework is periodic. More... | |
| gp_Pnt2d | Pole (const Standard_Integer Index) const |
| Returns the pole of index Index to the poles table of the BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table of the BSpline curve whose data is computed in this framework. More... | |
| Standard_Real | Weight (const Standard_Integer Index) const |
| Returns the weight of the pole of index Index to the poles table of the BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table of the BSpline curve whose data is computed in this framework. More... | |
| Standard_Real | Knot (const Standard_Integer Index) const |
| Returns the knot of index Index to the knots table of the BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of the BSpline curve whose data is computed in this framework. More... | |
| Standard_Integer | Multiplicity (const Standard_Integer Index) const |
| Returns the multiplicity of the knot of index Index to the knots table of the BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of the BSpline curve whose data is computed in this framework. More... | |
| void | BuildCosAndSin (const Convert_ParameterisationType Parametrisation, Handle< TColStd_HArray1OfReal > &CosNumerator, Handle< TColStd_HArray1OfReal > &SinNumerator, Handle< TColStd_HArray1OfReal > &Denominator, Standard_Integer &Degree, Handle< TColStd_HArray1OfReal > &Knots, Handle< TColStd_HArray1OfInteger > &Mults) const |
| void | BuildCosAndSin (const Convert_ParameterisationType Parametrisation, const Standard_Real UFirst, const Standard_Real ULast, Handle< TColStd_HArray1OfReal > &CosNumerator, Handle< TColStd_HArray1OfReal > &SinNumerator, Handle< TColStd_HArray1OfReal > &Denominator, Standard_Integer &Degree, Handle< TColStd_HArray1OfReal > &Knots, Handle< TColStd_HArray1OfInteger > &Mults) const |
Additional Inherited Members | |
| Protected Member Functions inherited from Convert_ConicToBSplineCurve | |
| Convert_ConicToBSplineCurve (const Standard_Integer NumberOfPoles, const Standard_Integer NumberOfKnots, const Standard_Integer Degree) | |
| Protected Attributes inherited from Convert_ConicToBSplineCurve | |
| Handle< TColgp_HArray1OfPnt2d > | poles |
| Handle< TColStd_HArray1OfReal > | weights |
| Handle< TColStd_HArray1OfReal > | knots |
| Handle< TColStd_HArray1OfInteger > | mults |
| Standard_Integer | degree |
| Standard_Integer | nbPoles |
| Standard_Integer | nbKnots |
| Standard_Boolean | isperiodic |
Detailed Description
This algorithm converts a circle into a rational B-spline curve. The circle is a Circ2d from package gp and its parametrization is : P (U) = Loc + R * (Cos(U) * Xdir + Sin(U) * YDir) where Loc is the center of the circle Xdir and Ydir are the normalized directions of the local cartesian coordinate system of the circle. The parametrization range for the circle is U [0, 2Pi].
Warnings : The parametrization range for the B-spline curve is not [0, 2Pi].
KeyWords : Convert, Circle, BSplineCurve, 2D .
Constructor & Destructor Documentation
| Convert_CircleToBSplineCurve::Convert_CircleToBSplineCurve | ( | const gp_Circ2d & | C, |
| const Convert_ParameterisationType | Parameterisation = Convert_TgtThetaOver2 |
||
| ) |
The equivalent B-spline curve has the same orientation as the circle C.
| Convert_CircleToBSplineCurve::Convert_CircleToBSplineCurve | ( | const gp_Circ2d & | C, |
| const Standard_Real | U1, | ||
| const Standard_Real | U2, | ||
| const Convert_ParameterisationType | Parameterisation = Convert_TgtThetaOver2 |
||
| ) |
The circle C is limited between the parametric values U1, U2 in radians. U1 and U2 [0.0, 2*Pi] . The equivalent B-spline curve is oriented from U1 to U2 and has the same orientation as the circle C.
Raised if U1 = U2 or U1 = U2 + 2.0 * Pi
The documentation for this class was generated from the following file:
