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// This file is generated by WOK (CPPExt).
// Please do not edit this file; modify original file instead.
// The copyright and license terms as defined for the original file apply to
// this header file considered to be the "object code" form of the original source.
#ifndef _Geom2d_TrimmedCurve_HeaderFile
#define _Geom2d_TrimmedCurve_HeaderFile
#include <Standard.hxx>
#include <Standard_DefineHandle.hxx>
#include <Handle_Geom2d_TrimmedCurve.hxx>
#include <Handle_Geom2d_Curve.hxx>
#include <Standard_Real.hxx>
#include <Geom2d_BoundedCurve.hxx>
#include <Standard_Boolean.hxx>
#include <GeomAbs_Shape.hxx>
#include <Standard_Integer.hxx>
#include <Handle_Geom2d_Geometry.hxx>
class Geom2d_Curve;
class Standard_ConstructionError;
class Standard_RangeError;
class Standard_NoSuchObject;
class Geom2d_UndefinedDerivative;
class Geom2d_UndefinedValue;
class gp_Pnt2d;
class gp_Vec2d;
class gp_Trsf2d;
class Geom2d_Geometry;
//! Defines a portion of a curve limited by two values of
//! parameters inside the parametric domain of the curve.
//! The trimmed curve is defined by:
//! - the basis curve, and
//! - the two parameter values which limit it.
//! The trimmed curve can either have the same
//! orientation as the basis curve or the opposite orientation.
class Geom2d_TrimmedCurve : public Geom2d_BoundedCurve
{
public:
//! Creates a trimmed curve from the basis curve C limited between
//! U1 and U2.
//!
//! . U1 can be greater or lower than U2.
//! . The returned curve is oriented from U1 to U2.
//! . If the basis curve C is periodic there is an ambiguity
//! because two parts are available. In this case by default
//! the trimmed curve has the same orientation as the basis
//! curve (Sense = True). If Sense = False then the orientation
//! of the trimmed curve is opposite to the orientation of the
//! basis curve C.
//! If the curve is closed but not periodic it is not possible
//! to keep the part of the curve including the junction point
//! (except if the junction point is at the beginning or
//! at the end of the trimmed curve) because you could lose the
//! fundamental characteristics of the basis curve which are
//! used for example to compute the derivatives of the trimmed
//! curve. So for a closed curve the rules are the same as for
//! a open curve.
//! Warnings :
//! In this package the entities are not shared. The TrimmedCurve is
//! built with a copy of the curve C. So when C is modified the
//! TrimmedCurve is not modified
//! Warnings :
//! If <C> is periodic and <theAdjustPeriodic> is True, parametrics
//! bounds of the TrimmedCurve, can be different to [<U1>;<U2>},
//! if <U1> or <U2> are not in the principal period.
//! Include :
//! For more explanation see the scheme given with this class.
//! Raises ConstructionError the C is not periodic and U1 or U2 are out of
//! the bounds of C.
//! Raised if U1 = U2.
Standard_EXPORT Geom2d_TrimmedCurve(const Handle(Geom2d_Curve)& C, const Standard_Real U1, const Standard_Real U2, const Standard_Boolean Sense = Standard_True, const Standard_Boolean theAdjustPeriodic = Standard_True);
//! Changes the direction of parametrization of <me>. The first and
//! the last parametric values are modified. The "StartPoint"
//! of the initial curve becomes the "EndPoint" of the reversed
//! curve and the "EndPoint" of the initial curve becomes the
//! "StartPoint" of the reversed curve.
//! Example - If the trimmed curve is defined by:
//! - a basis curve whose parameter range is [ 0.,1. ], and
//! - the two trim values U1 (first parameter) and U2 (last parameter),
//! the reversed trimmed curve is defined by:
//! - the reversed basis curve, whose parameter range is still [ 0.,1. ], and
//! - the two trim values 1. - U2 (first parameter)
//! and 1. - U1 (last parameter).
Standard_EXPORT void Reverse() ;
//! Returns the parameter on the reversed curve for
//! the point of parameter U on <me>.
//!
//! returns UFirst + ULast - U
Standard_EXPORT Standard_Real ReversedParameter (const Standard_Real U) const;
//! Changes this trimmed curve, by redefining the
//! parameter values U1 and U2, which limit its basis curve.
//! Note: If the basis curve is periodic, the trimmed curve
//! has the same orientation as the basis curve if Sense
//! is true (default value) or the opposite orientation if Sense is false.
//! Warning
//! If the basis curve is periodic and theAdjustPeriodic is True,
//! the bounds of the trimmed curve may be different from U1 and U2 if the
//! parametric origin of the basis curve is within the arc
//! of the trimmed curve. In this case, the modified
//! parameter will be equal to U1 or U2 plus or minus the period.
//! If theAdjustPeriodic is False, parameters U1 and U2 will stay unchanged.
//! Exceptions
//! Standard_ConstructionError if:
//! - the basis curve is not periodic, and either U1 or U2
//! are outside the bounds of the basis curve, or
//! - U1 is equal to U2.
Standard_EXPORT void SetTrim (const Standard_Real U1, const Standard_Real U2, const Standard_Boolean Sense = Standard_True, const Standard_Boolean theAdjustPeriodic = Standard_True) ;
//! Returns the basis curve.
//! Warning
//! This function does not return a constant reference.
//! Consequently, any modification of the returned value
//! directly modifies the trimmed curve.
Standard_EXPORT Handle(Geom2d_Curve) BasisCurve() const;
//! Returns the global continuity of the basis curve of this trimmed curve.
//! C0 : only geometric continuity,
//! C1 : continuity of the first derivative all along the Curve,
//! C2 : continuity of the second derivative all along the Curve,
//! C3 : continuity of the third derivative all along the Curve,
//! CN : the order of continuity is infinite.
Standard_EXPORT GeomAbs_Shape Continuity() const;
//! --- Purpose
//! Returns True if the order of continuity of the
//! trimmed curve is N. A trimmed curve is at least "C0" continuous.
//! Warnings :
//! The continuity of the trimmed curve can be greater than
//! the continuity of the basis curve because you consider
//! only a part of the basis curve.
//! Raised if N < 0.
Standard_EXPORT Standard_Boolean IsCN (const Standard_Integer N) const;
//! Returns the end point of <me>. This point is the
//! evaluation of the curve for the "LastParameter".
Standard_EXPORT gp_Pnt2d EndPoint() const;
//! Returns the value of the first parameter of <me>.
//! The first parameter is the parameter of the "StartPoint"
//! of the trimmed curve.
Standard_EXPORT Standard_Real FirstParameter() const;
//! Returns True if the distance between the StartPoint and
//! the EndPoint is lower or equal to Resolution from package
//! gp.
Standard_EXPORT Standard_Boolean IsClosed() const;
//! Returns true if the basis curve of this trimmed curve is periodic.
Standard_EXPORT Standard_Boolean IsPeriodic() const;
//! Returns the period of the basis curve of this trimmed curve.
//! Exceptions
//! Standard_NoSuchObject if the basis curve is not periodic.
Standard_EXPORT virtual Standard_Real Period() const;
//! Returns the value of the last parameter of <me>.
//! The last parameter is the parameter of the "EndPoint" of the
//! trimmed curve.
Standard_EXPORT Standard_Real LastParameter() const;
//! Returns the start point of <me>.
//! This point is the evaluation of the curve from the
//! "FirstParameter".
//! value and derivatives
//! Warnings :
//! The returned derivatives have the same orientation as the
//! derivatives of the basis curve.
Standard_EXPORT gp_Pnt2d StartPoint() const;
//! If the basis curve is an OffsetCurve sometimes it is not
//! possible to do the evaluation of the curve at the parameter
//! U (see class OffsetCurve).
Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt2d& P) const;
//! Raised if the continuity of the curve is not C1.
Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1) const;
//! Raised if the continuity of the curve is not C2.
Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const;
//! Raised if the continuity of the curve is not C3.
Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const;
//! For the point of parameter U of this trimmed curve,
//! computes the vector corresponding to the Nth derivative.
//! Warning
//! The returned derivative vector has the same
//! orientation as the derivative vector of the basis curve,
//! even if the trimmed curve does not have the same
//! orientation as the basis curve.
//! Exceptions
//! Standard_RangeError if N is less than 1.
//! geometric transformations
Standard_EXPORT gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const;
//! Applies the transformation T to this trimmed curve.
//! Warning The basis curve is also modified.
Standard_EXPORT void Transform (const gp_Trsf2d& T) ;
//! Returns the parameter on the transformed curve for
//! the transform of the point of parameter U on <me>.
//!
//! me->Transformed(T)->Value(me->TransformedParameter(U,T))
//!
//! is the same point as
//!
//! me->Value(U).Transformed(T)
//!
//! This methods calls the basis curve method.
Standard_EXPORT virtual Standard_Real TransformedParameter (const Standard_Real U, const gp_Trsf2d& T) const;
//! Returns a coefficient to compute the parameter on
//! the transformed curve for the transform of the
//! point on <me>.
//!
//! Transformed(T)->Value(U * ParametricTransformation(T))
//!
//! is the same point as
//!
//! Value(U).Transformed(T)
//!
//! This methods calls the basis curve method.
Standard_EXPORT virtual Standard_Real ParametricTransformation (const gp_Trsf2d& T) const;
//! Creates a new object, which is a copy of this trimmed curve.
Standard_EXPORT Handle(Geom2d_Geometry) Copy() const;
DEFINE_STANDARD_RTTI(Geom2d_TrimmedCurve)
protected:
private:
Handle(Geom2d_Curve) basisCurve;
Standard_Real uTrim1;
Standard_Real uTrim2;
};
#endif // _Geom2d_TrimmedCurve_HeaderFile
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