#include <TColStd_Array1OfReal.hxx>
#include <TColStd_Array2OfReal.hxx>
-//! \brief A cache class for B-spline surfaces.
+#include <BSplCLib_CacheParams.hxx>
+
+//! \brief A cache class for Bezier and B-spline surfaces.
//!
-//! Defines all data, that can be cached on a span of B-spline surface.
+//! Defines all data, that can be cached on a span of the surface.
//! The data should be recalculated in going from span to span.
class BSplSLib_Cache : public Standard_Transient
{
public:
- //! Default constructor
- Standard_EXPORT BSplSLib_Cache();
- //! Constructor for caching of the span for B-spline surface
- //! \param theDegreeU degree along the first parameter (U) of the B-spline
- //! \param thePeriodicU identify the B-spline is periodical along U axis
- //! \param theFlatKnotsU knots of B-spline curve (with repetition) along U axis
- //! \param theDegreeV degree alogn the second parameter (V) of the B-spline
- //! \param thePeriodicV identify the B-spline is periodical along V axis
- //! \param theFlatKnotsV knots of B-spline curve (with repetition) along V axis
- //! \param thePoles array of poles of the B-spline surface
+
+ //! Constructor for caching of the span for the surface
+ //! \param theDegreeU degree along the first parameter (U) of the surface
+ //! \param thePeriodicU identify the surface is periodical along U axis
+ //! \param theFlatKnotsU knots of the surface (with repetition) along U axis
+ //! \param theDegreeV degree alogn the second parameter (V) of the surface
+ //! \param thePeriodicV identify the surface is periodical along V axis
+ //! \param theFlatKnotsV knots of the surface (with repetition) along V axis
//! \param theWeights array of weights of corresponding poles
Standard_EXPORT BSplSLib_Cache(const Standard_Integer& theDegreeU,
const Standard_Boolean& thePeriodicU,
const Standard_Integer& theDegreeV,
const Standard_Boolean& thePeriodicV,
const TColStd_Array1OfReal& theFlatKnotsV,
- const TColgp_Array2OfPnt& thePoles,
const TColStd_Array2OfReal* theWeights = NULL);
//! Verifies validity of the cache using parameters of the point
//! Recomputes the cache data. Does not verify validity of the cache
//! \param theParameterU the parametric value on the U axis to identify the span
//! \param theParameterV the parametric value on the V axis to identify the span
- //! \param theDegreeU degree of the B-spline along U axis
- //! \param thePeriodicU identify the B-spline is periodic along U axis
- //! \param theFlatKnotsU flat knots of B-spline surface along U axis
- //! \param theDegreeV degree of the B-spline along V axis
- //! \param thePeriodicV identify the B-spline is periodic along V axis
- //! \param theFlatKnotsV flat knots of B-spline surface along V axis
- //! \param thePoles array of poles of B-spline
+ //! \param theDegreeU degree along U axis
+ //! \param thePeriodicU identify whether the surface is periodic along U axis
+ //! \param theFlatKnotsU flat knots of the surface along U axis
+ //! \param theDegreeV degree along V axis
+ //! \param thePeriodicV identify whether the surface is periodic along V axis
+ //! \param theFlatKnotsV flat knots of the surface along V axis
+ //! \param thePoles array of poles of the surface
//! \param theWeights array of weights of corresponding poles
- Standard_EXPORT void BuildCache(const Standard_Real& theParameterU,
- const Standard_Real& theParameterV,
- const Standard_Integer& theDegreeU,
- const Standard_Boolean& thePeriodicU,
- const TColStd_Array1OfReal& theFlatKnotsU,
- const Standard_Integer& theDegreeV,
- const Standard_Boolean& thePeriodicV,
- const TColStd_Array1OfReal& theFlatKnotsV,
+ Standard_EXPORT void BuildCache(const Standard_Real& theParameterU,
+ const Standard_Real& theParameterV,
+ const TColStd_Array1OfReal& theFlatKnotsU,
+ const TColStd_Array1OfReal& theFlatKnotsV,
const TColgp_Array2OfPnt& thePoles,
const TColStd_Array2OfReal* theWeights = NULL);
- //! Calculates the point on B-spline for specified parameters
+ //! Calculates the point on the surface for specified parameters
//! \param[in] theU first parameter for calculation of the value
//! \param[in] theV second parameter for calculation of the value
- //! \param[out] thePoint the result of calculation (the point on the B-spline)
+ //! \param[out] thePoint the result of calculation (the point on the surface)
Standard_EXPORT void D0(const Standard_Real& theU, const Standard_Real& theV, gp_Pnt& thePoint) const;
- //! Calculates the point on B-spline and its first derivative
+ //! Calculates the point on the surface and its first derivative
//! \param[in] theU first parameter of calculation of the value
//! \param[in] theV second parameter of calculation of the value
- //! \param[out] thePoint the result of calculation (the point on the B-spline)
+ //! \param[out] thePoint the result of calculation (the point on the surface)
//! \param[out] theTangentU tangent vector along U axis in the calculated point
//! \param[out] theTangentV tangent vector along V axis in the calculated point
Standard_EXPORT void D1(const Standard_Real& theU,
gp_Vec& theTangentU,
gp_Vec& theTangentV) const;
- //! Calculates the point on B-spline and derivatives till second order
+ //! Calculates the point on the surface and derivatives till second order
//! \param[in] theU first parameter of calculation of the value
//! \param[in] theV second parameter of calculation of the value
- //! \param[out] thePoint the result of calculation (the point on B-spline)
+ //! \param[out] thePoint the result of calculation (the point on the surface)
//! \param[out] theTangentU tangent vector along U axis in the calculated point
//! \param[out] theTangentV tangent vector along V axis in the calculated point
//! \param[out] theCurvatureU curvature vector (2nd derivative on U) along U axis
gp_Vec& theCurvatureUV) const;
- DEFINE_STANDARD_RTTI(BSplSLib_Cache, Standard_Transient)
+ DEFINE_STANDARD_RTTIEXT(BSplSLib_Cache,Standard_Transient)
-protected:
- //! Normalizes the parameter for periodical B-splines
- //! \param[in] theDegree degree of B-spline along selected direction
- //! \param[in] theFlatKnots knots with repetitions along selected direction
- //! \param[in,out] theParameter the value to be normalized into the knots array
- void PeriodicNormalization(const Standard_Integer& theDegree,
- const TColStd_Array1OfReal& theFlatKnots,
- Standard_Real& theParameter) const;
+private:
+ // copying is prohibited
+ BSplSLib_Cache (const BSplSLib_Cache&);
+ void operator = (const BSplSLib_Cache&);
private:
- Handle(TColStd_HArray2OfReal) myPolesWeights; ///< array of poles and weights of calculated cache
+ Standard_Boolean myIsRational; //!< identifies the rationality of Bezier/B-spline surface
+ BSplCLib_CacheParams myParamsU, myParamsV; //!< cach parameters by U and V directions
+ Handle(TColStd_HArray2OfReal) myPolesWeights; //!< array of poles and weights of calculated cache
// the array has following structure:
// x11 y11 z11 [w11] x12 y12 z12 [w12] ...
// x21 y21 z21 [w21] x22 y22 z22 [w22] etc
// for non-rational surfaces there is no weight;
// size of array: (max(myDegree)+1) * A*(min(myDegree)+1), where A = 4 or 3
-
- Standard_Boolean myIsRational; ///< identifies the rationality of B-spline
- Standard_Real mySpanStart[2]; ///< parameters (u, v) for the frst point of the span
- Standard_Real mySpanLength[2]; ///< lengths of the span along corresponding parameter
- Standard_Integer mySpanIndex[2]; ///< indexes of the span on B-spline surface
- Standard_Integer mySpanIndexMax[2]; ///< maximal indexes of span
- Standard_Integer myDegree[2]; ///< degrees of B-spline for each parameter
- Handle(TColStd_HArray1OfReal) myFlatKnots[2]; ///< arrays of knots of B-spline
- // (used for periodic normalization of parameters, Null for non-periodical splines)
};
DEFINE_STANDARD_HANDLE(BSplSLib_Cache, Standard_Transient)
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