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https://github.com/Open-Cascade-SAS/OCCT.git
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32ca7a5106
1. Approximation of derivative (by Taylor-series and by three points). 2. Some methods (Degree(), GetType(), D0(), D3(), DN()) are added. 3. Getting of subInterval's boundaries. 4. Algorithm for checking if 1st derivative is equal to zero is amended. 5. Cases are controlled when extrema or Project point do not exist. 6. GetNormal() function for gp_Vec2d was added. 7. Computing of Value, D0, D1, D2 and D3 for offset curves was changed. 8. Limitation of tolerance for derivative computing was added. 9. Methods for computing trihedron in singularity point are added. 10. Test tests/bugs/moddata_3/bug23706 is added. 11. Restriction on the LastParameter for visualization of 3-D curves. Calling PlotCurve(...) function for last interval. 12. LProp package is modified for tangent computing in singularity point (LProp_CLProps, LProp_SLProps). 13. Added test cases for issue. Deleting bad test cases for this fix
253 lines
8.8 KiB
Plaintext
Executable File
253 lines
8.8 KiB
Plaintext
Executable File
-- Created on: 1995-07-17
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-- Created by: Modelistation
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-- Copyright (c) 1995-1999 Matra Datavision
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-- Copyright (c) 1999-2012 OPEN CASCADE SAS
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--
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-- The content of this file is subject to the Open CASCADE Technology Public
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-- License Version 6.5 (the "License"). You may not use the content of this file
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-- except in compliance with the License. Please obtain a copy of the License
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-- at http://www.opencascade.org and read it completely before using this file.
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--
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-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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--
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-- The Original Code and all software distributed under the License is
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-- distributed on an "AS IS" basis, without warranty of any kind, and the
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-- Initial Developer hereby disclaims all such warranties, including without
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-- limitation, any warranties of merchantability, fitness for a particular
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-- purpose or non-infringement. Please see the License for the specific terms
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-- and conditions governing the rights and limitations under the License.
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class CurveTool from HLRBRep
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uses
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Array1OfReal from TColStd,
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Shape from GeomAbs,
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CurveType from GeomAbs,
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Vec2d from gp,
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Pnt2d from gp,
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Circ2d from gp,
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Elips2d from gp,
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Hypr2d from gp,
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Parab2d from gp,
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Lin2d from gp,
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BezierCurve from Geom2d,
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BSplineCurve from Geom2d
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raises
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OutOfRange from Standard,
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NoSuchObject from Standard,
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DomainError from Standard
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is
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--
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-- Global methods - Apply to the whole curve.
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--
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FirstParameter(myclass; C: Address from Standard)
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returns Real from Standard;
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---C++: inline
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LastParameter(myclass; C: Address from Standard)
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returns Real from Standard;
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---C++: inline
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--
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-- Services to break the curves to the expected continuity
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--
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-- If for example you need the curve to be C2 and the method
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-- Continuity returns you something lower than C2 (say C1 for
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-- example).
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--
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-- First compute the number of intervals with the requested
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-- continuity with the method NbIntervals(). Note that if the
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-- continuity is higher than the one you need NbIntervals will
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-- return 1.
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--
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-- Then you get the parameters bounding the intervals with the
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-- method Intervals, using an array of length at least
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-- NbIntervals()+1.
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--
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-- If you need to create a curve with a restricted span you can
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-- use the method Trim().
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Continuity(myclass; C: Address from Standard)
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returns Shape from GeomAbs;
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---Purpose:
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---C++: inline
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NbIntervals(myclass; C: Address from Standard)
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returns Integer from Standard;
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---Purpose: Returns the number of intervals for continuity
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-- <S>. May be one if Continuity(myclass) >= <S>
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---C++: inline
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Intervals(myclass; C : Address from Standard;
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T : in out Array1OfReal from TColStd)
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---Purpose: Stores in <T> the parameters bounding the intervals
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-- of continuity <S>.
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--
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-- The array must provide enough room to accomodate
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-- for the parameters. i.e. T.Length() > NbIntervals()
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raises
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OutOfRange from Standard;
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---C++: inline
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GetInterval (myclass; C : Address from Standard
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; Index : Integer from Standard
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; Tab : Array1OfReal from TColStd
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; U1, U2 : out Real from Standard);
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---Purpose : output the bounds of interval of index <Index>
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-- used if Type == Composite.
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---C++: inline
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IsClosed(myclass; C: Address from Standard)
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returns Boolean from Standard;
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---C++: inline
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IsPeriodic(myclass; C: Address from Standard)
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returns Boolean from Standard;
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---C++: inline
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Period(myclass; C: Address from Standard)
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returns Real from Standard
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raises DomainError from Standard; -- if the curve is not periodic
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---C++: inline
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Value(myclass; C: Address from Standard; U : Real)
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returns Pnt2d from gp;
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--- Purpose : Computes the point of parameter U on the curve.
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---C++: inline
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D0 (myclass; C : Address from Standard;
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U : Real from Standard;
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P : out Pnt2d from gp);
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--- Purpose : Computes the point of parameter U on the curve.
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---C++: inline
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D1 (myclass; C : Address from Standard;
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U : Real from Standard;
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P : out Pnt2d from gp;
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V : out Vec2d from gp)
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--- Purpose : Computes the point of parameter U on the curve
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-- with its first derivative.
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raises DomainError from Standard;
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--- Purpose : Raised if the continuity of the current interval
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-- is not C1.
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---C++: inline
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D2 (myclass; C : Address from Standard;
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U : Real from Standard;
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P : out Pnt2d from gp;
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V1, V2 : out Vec2d from gp)
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--- Purpose :
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-- Returns the point P of parameter U, the first and second
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-- derivatives V1 and V2.
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raises DomainError from Standard;
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--- Purpose : Raised if the continuity of the current interval
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-- is not C2.
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---C++: inline
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D3 (myclass; C : Address from Standard;
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U : Real from Standard;
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P : out Pnt2d from gp;
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V1, V2, V3 : out Vec2d from gp)
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--- Purpose :
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-- Returns the point P of parameter U, the first, the second
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-- and the third derivative.
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raises DomainError from Standard;
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--- Purpose : Raised if the continuity of the current interval
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-- is not C3.
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---C++: inline
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DN (myclass; C : Address from Standard;
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U : Real from Standard;
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N : Integer from Standard)
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returns Vec2d from gp
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--- Purpose :
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-- The returned vector gives the value of the derivative for the
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-- order of derivation N.
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raises
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DomainError from Standard,
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--- Purpose : Raised if the continuity of the current interval
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-- is not CN.
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OutOfRange from Standard;
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--- Purpose : Raised if N < 1.
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---C++: inline
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Resolution(myclass; C : Address from Standard;
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R3d : Real from Standard)
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returns Real from Standard;
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---Purpose : Returns the parametric resolution corresponding
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-- to the real space resolution <R3d>.
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---C++: inline
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GetType(myclass; C: Address from Standard)
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returns CurveType from GeomAbs;
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---Purpose: Returns the type of the curve in the current
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-- interval : Line, Circle, Ellipse, Hyperbola,
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-- Parabola, BezierCurve, BSplineCurve, OtherCurve.
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---C++: inline
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TheType(myclass; C: Address from Standard)
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returns CurveType from GeomAbs;
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---Purpose: Returns the type of the curve in the current
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-- interval : Line, Circle, Ellipse, Hyperbola,
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-- Parabola, BezierCurve, BSplineCurve, OtherCurve.
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---C++: inline
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--
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-- The following methods must be called when GetType returned
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-- the corresponding type.
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--
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Line(myclass; C: Address from Standard) returns Lin2d from gp
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raises NoSuchObject from Standard;
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---C++: inline
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Circle(myclass; C: Address from Standard) returns Circ2d from gp
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raises NoSuchObject from Standard;
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---C++: inline
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Ellipse(myclass; C: Address from Standard) returns Elips2d from gp
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raises NoSuchObject from Standard;
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---C++: inline
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Hyperbola(myclass; C: Address from Standard) returns Hypr2d from gp
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raises NoSuchObject from Standard;
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---C++: inline
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Parabola(myclass; C: Address from Standard) returns Parab2d from gp
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raises NoSuchObject from Standard;
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---C++: inline
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Bezier(myclass; C: Address from Standard)
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returns BezierCurve from Geom2d
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raises NoSuchObject from Standard;
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---C++: inline
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BSpline(myclass; C: Address from Standard)
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returns BSplineCurve from Geom2d
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raises NoSuchObject from Standard;
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---C++: inline
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EpsX(myclass; C:Address from Standard)
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---C++: inline
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returns Real from Standard;
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NbSamples(myclass; C : Address from Standard;
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U0,U1: Real from Standard)
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returns Integer from Standard;
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NbSamples(myclass; C: Address from Standard)
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returns Integer from Standard;
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Degree(myclass; C: Address from Standard)
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returns Integer from Standard;
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---C++: inline
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end CurveTool;
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