Open CASCADE Technology
7.7.0
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A cache class for Bezier and B-spline curves. More...
#include <BSplCLib_Cache.hxx>
Public Member Functions | |
BSplCLib_Cache (const Standard_Integer &theDegree, const Standard_Boolean &thePeriodic, const TColStd_Array1OfReal &theFlatKnots, const TColgp_Array1OfPnt2d &thePoles2d, const TColStd_Array1OfReal *theWeights=NULL) | |
Constructor, prepares data structures for caching values on a 2d curve. More... | |
BSplCLib_Cache (const Standard_Integer &theDegree, const Standard_Boolean &thePeriodic, const TColStd_Array1OfReal &theFlatKnots, const TColgp_Array1OfPnt &thePoles, const TColStd_Array1OfReal *theWeights=NULL) | |
Constructor, prepares data structures for caching values on a 3d curve. More... | |
Standard_Boolean | IsCacheValid (Standard_Real theParameter) const |
Verifies validity of the cache using flat parameter of the point. More... | |
void | BuildCache (const Standard_Real &theParameter, const TColStd_Array1OfReal &theFlatKnots, const TColgp_Array1OfPnt2d &thePoles2d, const TColStd_Array1OfReal *theWeights) |
Recomputes the cache data for 2D curves. Does not verify validity of the cache. More... | |
void | BuildCache (const Standard_Real &theParameter, const TColStd_Array1OfReal &theFlatKnots, const TColgp_Array1OfPnt &thePoles, const TColStd_Array1OfReal *theWeights=NULL) |
Recomputes the cache data for 3D curves. Does not verify validity of the cache. More... | |
void | D0 (const Standard_Real &theParameter, gp_Pnt2d &thePoint) const |
Calculates the point on the curve in the specified parameter. More... | |
void | D0 (const Standard_Real &theParameter, gp_Pnt &thePoint) const |
void | D1 (const Standard_Real &theParameter, gp_Pnt2d &thePoint, gp_Vec2d &theTangent) const |
Calculates the point on the curve and its first derivative in the specified parameter. More... | |
void | D1 (const Standard_Real &theParameter, gp_Pnt &thePoint, gp_Vec &theTangent) const |
void | D2 (const Standard_Real &theParameter, gp_Pnt2d &thePoint, gp_Vec2d &theTangent, gp_Vec2d &theCurvature) const |
Calculates the point on the curve and two derivatives in the specified parameter. More... | |
void | D2 (const Standard_Real &theParameter, gp_Pnt &thePoint, gp_Vec &theTangent, gp_Vec &theCurvature) const |
void | D3 (const Standard_Real &theParameter, gp_Pnt2d &thePoint, gp_Vec2d &theTangent, gp_Vec2d &theCurvature, gp_Vec2d &theTorsion) const |
Calculates the point on the curve and three derivatives in the specified parameter. More... | |
void | D3 (const Standard_Real &theParameter, gp_Pnt &thePoint, gp_Vec &theTangent, gp_Vec &theCurvature, gp_Vec &theTorsion) const |
Public Member Functions inherited from Standard_Transient | |
Standard_Transient () | |
Empty constructor. More... | |
Standard_Transient (const Standard_Transient &) | |
Copy constructor – does nothing. More... | |
Standard_Transient & | operator= (const Standard_Transient &) |
Assignment operator, needed to avoid copying reference counter. More... | |
virtual | ~Standard_Transient () |
Destructor must be virtual. More... | |
virtual void | Delete () const |
Memory deallocator for transient classes. More... | |
virtual const opencascade::handle< Standard_Type > & | DynamicType () const |
Returns a type descriptor about this object. More... | |
Standard_Boolean | IsInstance (const opencascade::handle< Standard_Type > &theType) const |
Returns a true value if this is an instance of Type. More... | |
Standard_Boolean | IsInstance (const Standard_CString theTypeName) const |
Returns a true value if this is an instance of TypeName. More... | |
Standard_Boolean | IsKind (const opencascade::handle< Standard_Type > &theType) const |
Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More... | |
Standard_Boolean | IsKind (const Standard_CString theTypeName) const |
Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More... | |
Standard_Transient * | This () const |
Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More... | |
Standard_Integer | GetRefCount () const |
Get the reference counter of this object. More... | |
void | IncrementRefCounter () const |
Increments the reference counter of this object. More... | |
Standard_Integer | DecrementRefCounter () const |
Decrements the reference counter of this object; returns the decremented value. More... | |
Protected Member Functions | |
void | CalculateDerivative (const Standard_Real &theParameter, const Standard_Integer &theDerivative, Standard_Real &theDerivArray) const |
Fills array of derivatives in the selected point of the curve. More... | |
BSplCLib_Cache (const BSplCLib_Cache &) | |
void | operator= (const BSplCLib_Cache &) |
Additional Inherited Members | |
Public Types inherited from Standard_Transient | |
typedef void | base_type |
Returns a type descriptor about this object. More... | |
Static Public Member Functions inherited from Standard_Transient | |
static const char * | get_type_name () |
Returns a type descriptor about this object. More... | |
static const opencascade::handle< Standard_Type > & | get_type_descriptor () |
Returns type descriptor of Standard_Transient class. More... | |
A cache class for Bezier and B-spline curves.
Defines all data, that can be cached on a span of a curve. The data should be recalculated in going from span to span.
BSplCLib_Cache::BSplCLib_Cache | ( | const Standard_Integer & | theDegree, |
const Standard_Boolean & | thePeriodic, | ||
const TColStd_Array1OfReal & | theFlatKnots, | ||
const TColgp_Array1OfPnt2d & | thePoles2d, | ||
const TColStd_Array1OfReal * | theWeights = NULL |
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) |
Constructor, prepares data structures for caching values on a 2d curve.
theDegree | degree of the curve |
thePeriodic | identify whether the curve is periodic |
theFlatKnots | knots of Bezier/B-spline curve (with repetitions) |
thePoles2d | array of poles of 2D curve |
theWeights | array of weights of corresponding poles |
BSplCLib_Cache::BSplCLib_Cache | ( | const Standard_Integer & | theDegree, |
const Standard_Boolean & | thePeriodic, | ||
const TColStd_Array1OfReal & | theFlatKnots, | ||
const TColgp_Array1OfPnt & | thePoles, | ||
const TColStd_Array1OfReal * | theWeights = NULL |
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) |
Constructor, prepares data structures for caching values on a 3d curve.
theDegree | degree of the curve |
thePeriodic | identify whether the curve is periodic |
theFlatKnots | knots of Bezier/B-spline curve (with repetitions) |
thePoles | array of poles of 3D curve |
theWeights | array of weights of corresponding poles |
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protected |
void BSplCLib_Cache::BuildCache | ( | const Standard_Real & | theParameter, |
const TColStd_Array1OfReal & | theFlatKnots, | ||
const TColgp_Array1OfPnt2d & | thePoles2d, | ||
const TColStd_Array1OfReal * | theWeights | ||
) |
Recomputes the cache data for 2D curves. Does not verify validity of the cache.
theParameter | the value on the knot's axis to identify the span |
theFlatKnots | knots of Bezier/B-spline curve (with repetitions) |
thePoles2d | array of poles of 2D curve |
theWeights | array of weights of corresponding poles |
void BSplCLib_Cache::BuildCache | ( | const Standard_Real & | theParameter, |
const TColStd_Array1OfReal & | theFlatKnots, | ||
const TColgp_Array1OfPnt & | thePoles, | ||
const TColStd_Array1OfReal * | theWeights = NULL |
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) |
Recomputes the cache data for 3D curves. Does not verify validity of the cache.
theParameter | the value on the knot's axis to identify the span |
theFlatKnots | knots of Bezier/B-spline curve (with repetitions) |
thePoles | array of poles of 3D curve |
theWeights | array of weights of corresponding poles |
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protected |
Fills array of derivatives in the selected point of the curve.
[in] | theParameter | parameter of the calculation |
[in] | theDerivative | maximal derivative to be calculated (computes all derivatives lesser than specified) |
[out] | theDerivArray | result array of derivatives (with size (theDerivative+1)*(PntDim+1), where PntDim = 2 or 3 is a dimension of the curve) |
void BSplCLib_Cache::D0 | ( | const Standard_Real & | theParameter, |
gp_Pnt2d & | thePoint | ||
) | const |
Calculates the point on the curve in the specified parameter.
[in] | theParameter | parameter of calculation of the value |
[out] | thePoint | the result of calculation (the point on the curve) |
void BSplCLib_Cache::D0 | ( | const Standard_Real & | theParameter, |
gp_Pnt & | thePoint | ||
) | const |
void BSplCLib_Cache::D1 | ( | const Standard_Real & | theParameter, |
gp_Pnt2d & | thePoint, | ||
gp_Vec2d & | theTangent | ||
) | const |
Calculates the point on the curve and its first derivative in the specified parameter.
[in] | theParameter | parameter of calculation of the value |
[out] | thePoint | the result of calculation (the point on the curve) |
[out] | theTangent | tangent vector (first derivatives) for the curve in the calculated point |
void BSplCLib_Cache::D1 | ( | const Standard_Real & | theParameter, |
gp_Pnt & | thePoint, | ||
gp_Vec & | theTangent | ||
) | const |
void BSplCLib_Cache::D2 | ( | const Standard_Real & | theParameter, |
gp_Pnt2d & | thePoint, | ||
gp_Vec2d & | theTangent, | ||
gp_Vec2d & | theCurvature | ||
) | const |
Calculates the point on the curve and two derivatives in the specified parameter.
[in] | theParameter | parameter of calculation of the value |
[out] | thePoint | the result of calculation (the point on the curve) |
[out] | theTangent | tangent vector (1st derivatives) for the curve in the calculated point |
[out] | theCurvature | curvature vector (2nd derivatives) for the curve in the calculated point |
void BSplCLib_Cache::D2 | ( | const Standard_Real & | theParameter, |
gp_Pnt & | thePoint, | ||
gp_Vec & | theTangent, | ||
gp_Vec & | theCurvature | ||
) | const |
void BSplCLib_Cache::D3 | ( | const Standard_Real & | theParameter, |
gp_Pnt2d & | thePoint, | ||
gp_Vec2d & | theTangent, | ||
gp_Vec2d & | theCurvature, | ||
gp_Vec2d & | theTorsion | ||
) | const |
Calculates the point on the curve and three derivatives in the specified parameter.
[in] | theParameter | parameter of calculation of the value |
[out] | thePoint | the result of calculation (the point on the curve) |
[out] | theTangent | tangent vector (1st derivatives) for the curve in the calculated point |
[out] | theCurvature | curvature vector (2nd derivatives) for the curve in the calculated point |
[out] | theTorsion | second curvature vector (3rd derivatives) for the curve in the calculated point |
void BSplCLib_Cache::D3 | ( | const Standard_Real & | theParameter, |
gp_Pnt & | thePoint, | ||
gp_Vec & | theTangent, | ||
gp_Vec & | theCurvature, | ||
gp_Vec & | theTorsion | ||
) | const |
Standard_Boolean BSplCLib_Cache::IsCacheValid | ( | Standard_Real | theParameter | ) | const |
Verifies validity of the cache using flat parameter of the point.
theParameter | parameter of the point placed in the span |
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protected |