#include <Geom_Curve.hxx>
Inheritance diagram for Geom_Curve:
Public Member Functions | |
virtual Standard_EXPORT 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 Standard_EXPORT Standard_Real | ReversedParameter (const Standard_Real U) const =0 |
Returns the parameter on the reversed curve for the point of parameter U on <me>. me->Reversed()->Value(me->ReversedParameter(U)) is the same point as me->Value(U) . | |
virtual Standard_EXPORT Standard_Real | TransformedParameter (const Standard_Real U, const gp_Trsf &T) const |
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 returns <u> It can be redefined. For example on the Line. . | |
virtual Standard_EXPORT Standard_Real | 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>. Transformed(T)->Value(U * ParametricTransformation(T)) is the same point as Value(U).Transformed(T) This methods returns 1. It can be redefined. For example on the Line. . | |
Standard_EXPORT Handle_Geom_Curve | Reversed () const |
Returns a copy of <me> reversed. . | |
virtual Standard_EXPORT Standard_Real | FirstParameter () const =0 |
Returns the value of the first parameter. Warnings : It can be RealFirst from package Standard if the curve is infinite . | |
virtual Standard_EXPORT Standard_Real | LastParameter () const =0 |
Returns the value of the last parameter. Warnings : It can be RealLast from package Standard if the curve is infinite . | |
virtual Standard_EXPORT Standard_Boolean | 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 wich is a fixed criterion independant of the application. . | |
virtual Standard_EXPORT Standard_Boolean | 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 Standard_EXPORT Standard_Real | Period () const |
Returns the period of this curve. Exceptions Standard_NoSuchObject if this curve is not periodic. . | |
virtual Standard_EXPORT 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 Standard_EXPORT Standard_Boolean | IsCN (const Standard_Integer 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 Standard_EXPORT void | D0 (const Standard_Real U, gp_Pnt &P) const =0 |
Returns in P the point of parameter U. If the curve is periodic then the returned point is P(U) with U = Ustart + (U - Uend) where Ustart and Uend are the parametric bounds of the curve. Raised only for the "OffsetCurve" if it is not possible to compute the current point. For example when the first derivative on the basis curve and the offset direction are parallel. . | |
virtual Standard_EXPORT void | D1 (const Standard_Real U, gp_Pnt &P, gp_Vec &V1) const =0 |
Returns the point P of parameter U and the first derivative V1. //! Raised if the continuity of the curve is not C1. . | |
virtual Standard_EXPORT void | D2 (const Standard_Real U, gp_Pnt &P, gp_Vec &V1, gp_Vec &V2) const =0 |
Returns the point P of parameter U, the first and second derivatives V1 and V2. //! Raised if the continuity of the curve is not C2. . | |
virtual Standard_EXPORT void | D3 (const Standard_Real U, gp_Pnt &P, gp_Vec &V1, gp_Vec &V2, gp_Vec &V3) const =0 |
Returns the point P of parameter U, the first, the second and the third derivative. //! Raised if the continuity of the curve is not C3. . | |
virtual Standard_EXPORT gp_Vec | DN (const Standard_Real U, const Standard_Integer N) const =0 |
The returned vector gives the value of the derivative for the order of derivation N. //! Raised if the continuity of the curve is not CN. //! Raised if the derivative cannot be computed easily. e.g. rational bspline and n > 3. //! Raised if N < 1. . | |
Standard_EXPORT gp_Pnt | Value (const Standard_Real U) const |
Computes the point of parameter U on <me>. If the curve is periodic then the returned point is P(U) with U = Ustart + (U - Uend) where Ustart and Uend are the parametric bounds of the curve. it is implemented with D0. Raised only for the "OffsetCurve" if it is not possible to compute the current point. For example when the first derivative on the basis curve and the offset direction are parallel. . | |
Standard_EXPORT const | Handle (Standard_Type)&DynamicType() const |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Conic, Geom_Line, Geom_OffsetCurve, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Reimplemented from Geom_Geometry. Reimplemented in Geom_BezierCurve, Geom_BoundedCurve, Geom_BSplineCurve, Geom_Circle, Geom_Conic, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Conic, Geom_Line, Geom_OffsetCurve, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Reimplemented in Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Reimplemented in Geom_OffsetCurve, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Conic, Geom_Line, Geom_OffsetCurve, and Geom_TrimmedCurve. |
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Implemented in Geom_BezierCurve, Geom_BSplineCurve, Geom_Circle, Geom_Conic, Geom_Ellipse, Geom_Hyperbola, Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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Reimplemented in Geom_Line, Geom_OffsetCurve, Geom_Parabola, and Geom_TrimmedCurve. |
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