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Open CASCADE Technology Reference Manual 8.0.0
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Open CASCADE Technology Reference Manual 8.0.0
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The abstract class BoundedCurve describes the common behavior of bounded curves in 3D space. A bounded curve is limited by two finite values of the parameter, termed respectively "first parameter" and "last parameter". The "first parameter" gives the "start point" of the bounded curve, and the "last parameter" gives the "end point" of the bounded curve. The length of a bounded curve is finite. The Geom package provides three concrete classes of bounded curves: More...
#include <Geom_BoundedCurve.hxx>
Public Member Functions | |
| virtual gp_Pnt | EndPoint () const =0 |
| Returns the end point of the curve. | |
| virtual gp_Pnt | StartPoint () const =0 |
| Returns the start point of the curve. | |
| void | DumpJson (Standard_OStream &theOStream, int theDepth=-1) const override |
| Dumps the content of me into the stream. | |
 Public Member Functions inherited from Geom_Curve | |
| virtual void | Reverse ()=0 |
| Changes the direction of parametrization of <me>. The "FirstParameter" and the "LastParameter" are not changed but the orientation of the curve is modified. If the curve is bounded 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. | |
| virtual double | ReversedParameter (const double U) const =0 |
| Returns the parameter on the reversed curve for the point of parameter U on <me>. | |
| virtual double | TransformedParameter (const double U, const gp_Trsf &T) const |
| Returns the parameter on the transformed curve for the transform of the point of parameter U on <me>. | |
| virtual double | ParametricTransformation (const gp_Trsf &T) const |
| Returns a coefficient to compute the parameter on the transformed curve for the transform of the point on <me>. | |
| occ::handle< Geom_Curve > | Reversed () const |
| Returns a copy of <me> reversed. | |
| virtual double | FirstParameter () const =0 |
| Returns the value of the first parameter. Warnings : It can be RealFirst from package Standard if the curve is infinite. | |
| virtual double | LastParameter () const =0 |
| Returns the value of the last parameter. Warnings : It can be RealLast from package Standard if the curve is infinite. | |
| virtual bool | IsClosed () const =0 |
| Returns true if the curve is closed. Some curves such as circle are always closed, others such as line are never closed (by definition). Some Curves such as OffsetCurve can be closed or not. These curves are considered as closed if the distance between the first point and the last point of the curve is lower or equal to the Resolution from package gp which is a fixed criterion independent of the application. | |
| virtual bool | IsPeriodic () const =0 |
| Is the parametrization of the curve periodic ? It is possible only if the curve is closed and if the following relation is satisfied : for each parametric value U the distance between the point P(u) and the point P (u + T) is lower or equal to Resolution from package gp, T is the period and must be a constant. There are three possibilities : . the curve is never periodic by definition (SegmentLine) . the curve is always periodic by definition (Circle) . the curve can be defined as periodic (BSpline). In this case a function SetPeriodic allows you to give the shape of the curve. The general rule for this case is : if a curve can be periodic or not the default periodicity set is non periodic and you have to turn (explicitly) the curve into a periodic curve if you want the curve to be periodic. | |
| virtual double | Period () const |
| Returns the period of this curve. Exceptions Standard_NoSuchObject if this curve is not periodic. | |
| virtual GeomAbs_Shape | Continuity () const =0 |
| It is the global continuity of the 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, G1 : tangency continuity all along the Curve, G2 : curvature continuity all along the Curve, CN : the order of continuity is infinite. | |
| virtual bool | IsCN (const int N) const =0 |
| Returns true if the degree of continuity of this curve is at least N. Exceptions - Standard_RangeError if N is less than 0. | |
| virtual gp_Pnt | EvalD0 (const double U) const =0 |
| Computes the point of parameter U. Raises an exception on failure (e.g. OffsetCurve at singular point). | |
| virtual ResD1 | EvalD1 (const double U) const =0 |
| Computes the point and first derivative at parameter U. Raises an exception if the curve continuity is not C1. | |
| virtual ResD2 | EvalD2 (const double U) const =0 |
| Computes the point and first two derivatives at parameter U. Raises an exception if the curve continuity is not C2. | |
| virtual ResD3 | EvalD3 (const double U) const =0 |
| Computes the point and first three derivatives at parameter U. Raises an exception if the curve continuity is not C3. | |
| virtual gp_Vec | EvalDN (const double U, const int N) const =0 |
| Computes the Nth derivative at parameter U. Raises an exception if the curve continuity is not CN, or N < 1. | |
| void | D0 (const double U, gp_Pnt &P) const |
| Returns in P the point of parameter U. | |
| void | D1 (const double U, gp_Pnt &P, gp_Vec &V1) const |
| Returns the point P of parameter U and the first derivative V1. | |
| void | D2 (const double U, gp_Pnt &P, gp_Vec &V1, gp_Vec &V2) const |
| Returns the point P of parameter U, the first and second derivatives V1 and V2. | |
| void | D3 (const double U, gp_Pnt &P, gp_Vec &V1, gp_Vec &V2, gp_Vec &V3) const |
| Returns the point P of parameter U, the first, the second and the third derivative. | |
| gp_Vec | DN (const double U, const int N) const |
| The returned vector gives the value of the derivative for the order of derivation N. | |
| gp_Pnt | Value (const double U) const |
| Computes the point of parameter U on <me>. | |
| void | DumpJson (Standard_OStream &theOStream, int theDepth=-1) const override |
| Dumps the content of me into the stream. | |
| Public Member Functions inherited from Geom_Geometry | |
| void | Mirror (const gp_Pnt &P) |
| Performs the symmetrical transformation of a Geometry with respect to the point P which is the center of the symmetry. | |
| void | Mirror (const gp_Ax1 &A1) |
| Performs the symmetrical transformation of a Geometry with respect to an axis placement which is the axis of the symmetry. | |
| void | Mirror (const gp_Ax2 &A2) |
| Performs the symmetrical transformation of a Geometry with respect to a plane. The axis placement A2 locates the plane of the symmetry : (Location, XDirection, YDirection). | |
| void | Rotate (const gp_Ax1 &A1, const double Ang) |
| Rotates a Geometry. A1 is the axis of the rotation. Ang is the angular value of the rotation in radians. | |
| void | Scale (const gp_Pnt &P, const double S) |
| Scales a Geometry. S is the scaling value. | |
| void | Translate (const gp_Vec &V) |
| Translates a Geometry. V is the vector of the translation. | |
| void | Translate (const gp_Pnt &P1, const gp_Pnt &P2) |
| Translates a Geometry from the point P1 to the point P2. | |
| virtual void | Transform (const gp_Trsf &T)=0 |
| Transformation of a geometric object. This transformation can be a translation, a rotation, a symmetry, a scaling or a complex transformation obtained by combination of the previous elementaries transformations. (see class Transformation of the package Geom). | |
| occ::handle< Geom_Geometry > | Mirrored (const gp_Pnt &P) const |
| occ::handle< Geom_Geometry > | Mirrored (const gp_Ax1 &A1) const |
| occ::handle< Geom_Geometry > | Mirrored (const gp_Ax2 &A2) const |
| occ::handle< Geom_Geometry > | Rotated (const gp_Ax1 &A1, const double Ang) const |
| occ::handle< Geom_Geometry > | Scaled (const gp_Pnt &P, const double S) const |
| occ::handle< Geom_Geometry > | Transformed (const gp_Trsf &T) const |
| occ::handle< Geom_Geometry > | Translated (const gp_Vec &V) const |
| occ::handle< Geom_Geometry > | Translated (const gp_Pnt &P1, const gp_Pnt &P2) const |
| virtual occ::handle< Geom_Geometry > | Copy () const =0 |
| Creates a new object which is a copy of this geometric object. | |
| Public Member Functions inherited from Standard_Transient | |
| Standard_Transient () | |
| Empty constructor. | |
| Standard_Transient (const Standard_Transient &) | |
| Copy constructor – does nothing. | |
| Standard_Transient & | operator= (const Standard_Transient &) |
| Assignment operator, needed to avoid copying reference counter. | |
| virtual | ~Standard_Transient ()=default |
| Destructor must be virtual. | |
| virtual const opencascade::handle< Standard_Type > & | DynamicType () const |
| Returns a type descriptor about this object. | |
| bool | IsInstance (const opencascade::handle< Standard_Type > &theType) const |
| Returns a true value if this is an instance of Type. | |
| bool | IsInstance (const char *const theTypeName) const |
| Returns a true value if this is an instance of TypeName. | |
| bool | 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. | |
| bool | IsKind (const char *const 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. | |
| 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. | |
| int | GetRefCount () const noexcept |
| Get the reference counter of this object. | |
| void | IncrementRefCounter () noexcept |
| Increments the reference counter of this object. Uses relaxed memory ordering since incrementing only requires atomicity, not synchronization with other memory operations. | |
| int | DecrementRefCounter () noexcept |
| Decrements the reference counter of this object; returns the decremented value. Uses release ordering for the decrement to ensure all writes to the object are visible before the count reaches zero. An acquire fence is added only when the count reaches zero, ensuring proper synchronization before deletion. This is more efficient than using acq_rel for every decrement. | |
| virtual void | Delete () const |
| Memory deallocator for transient classes. | |
Additional Inherited Members | |
| Public Types inherited from Standard_Transient | |
| typedef void | base_type |
| Returns a type descriptor about this object. | |
| Static Public Member Functions inherited from Standard_Transient | |
| static constexpr const char * | get_type_name () |
| Returns a type descriptor about this object. | |
| static const opencascade::handle< Standard_Type > & | get_type_descriptor () |
| Returns type descriptor of Standard_Transient class. | |
The abstract class BoundedCurve describes the common behavior of bounded curves in 3D space. A bounded curve is limited by two finite values of the parameter, termed respectively "first parameter" and "last parameter". The "first parameter" gives the "start point" of the bounded curve, and the "last parameter" gives the "end point" of the bounded curve. The length of a bounded curve is finite. The Geom package provides three concrete classes of bounded curves:
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overridevirtual |
Dumps the content of me into the stream.
Reimplemented from Geom_Geometry.
Reimplemented in Geom_BSplineCurve, Geom_TrimmedCurve, GeomEval_AHTBezierCurve, and GeomEval_TBezierCurve.
Returns the end point of the curve.
Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_TrimmedCurve, GeomEval_AHTBezierCurve, and GeomEval_TBezierCurve.
Returns the start point of the curve.
Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_TrimmedCurve, GeomEval_AHTBezierCurve, and GeomEval_TBezierCurve.
1.10.0