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-- File: GeomFill_SweepFunction.cdl
-- Created: Thu Nov 20 18:55:05 1997
-- Author: Philippe MANGIN
-- <pmn@sgi29>
---Copyright: Matra Datavision 1997
private class SweepFunction from GeomFill
inherits SweepFunction from Approx
---Purpose: Function to approximate by SweepApproximation from
-- Approx. To bulid general sweep Surface.
uses
SectionLaw from GeomFill,
LocationLaw from GeomFill,
Mat from gp,
Vec from gp,
Pnt from gp,
Shape from GeomAbs ,
Array1OfPnt from TColgp,
Array1OfVec from TColgp,
Array1OfPnt2d from TColgp,
Array1OfVec2d from TColgp,
Array1OfReal from TColStd,
Array1OfInteger from TColStd
raises
OutOfRange from Standard
is
Create(Section : SectionLaw from GeomFill;
Location : LocationLaw from GeomFill;
FirstParameter, FirstParameterOnS, RatioParameterOnS : Real)
returns SweepFunction from GeomFill;
--
-- To compute Sections and derivatives Sections
--
--
D0(me : mutable;
Param: Real;
First, Last : Real;
Poles : out Array1OfPnt from TColgp;
Poles2d : out Array1OfPnt2d from TColgp;
Weigths : out Array1OfReal from TColStd)
---Purpose: compute the section for v = param
returns Boolean is redefined;
D1(me : mutable;
Param: Real;
First, Last : Real;
Poles : out Array1OfPnt from TColgp;
DPoles : out Array1OfVec from TColgp;
Poles2d : out Array1OfPnt2d from TColgp;
DPoles2d : out Array1OfVec2d from TColgp;
Weigths : out Array1OfReal from TColStd;
DWeigths : out Array1OfReal from TColStd)
---Purpose: compute the first derivative in v direction of the
-- section for v = param
returns Boolean
is redefined;
D2(me : mutable;
Param: Real;
First, Last : Real;
Poles : out Array1OfPnt from TColgp;
DPoles : out Array1OfVec from TColgp;
D2Poles : out Array1OfVec from TColgp;
Poles2d : out Array1OfPnt2d from TColgp;
DPoles2d : out Array1OfVec2d from TColgp;
D2Poles2d : out Array1OfVec2d from TColgp;
Weigths : out Array1OfReal from TColStd;
DWeigths : out Array1OfReal from TColStd;
D2Weigths : out Array1OfReal from TColStd)
---Purpose: compute the second derivative in v direction of the
-- section for v = param
returns Boolean
is redefined;
--
-- General Information On The Function
--
Nb2dCurves(me)
---Purpose: get the number of 2d curves to approximate.
returns Integer is redefined;
SectionShape(me; NbPoles : out Integer from Standard;
NbKnots : out Integer from Standard;
Degree : out Integer from Standard)
---Purpose: get the format of an section
is redefined;
Knots(me; TKnots: out Array1OfReal from TColStd)
---Purpose: get the Knots of the section
is redefined;
Mults(me; TMults: out Array1OfInteger from TColStd)
---Purpose: get the Multplicities of the section
is redefined;
IsRational(me)
---Purpose: Returns if the section is rationnal or not
returns Boolean is redefined;
--
-- Mangement of continuity
--
NbIntervals(me; S : Shape from GeomAbs)
---Purpose: Returns the number of intervals for continuity
-- <S>. May be one if Continuity(me) >= <S>
returns Integer is redefined;
Intervals(me; T : in out Array1OfReal from TColStd;
S : Shape from GeomAbs)
---Purpose: Stores in <T> the parameters bounding the intervals
-- of continuity <S>.
--
-- The array must provide enough room to accomodate
-- for the parameters. i.e. T.Length() > NbIntervals()
raises
OutOfRange from Standard
is redefined;
SetInterval(me: mutable; First, Last: Real from Standard)
---Purpose: Sets the bounds of the parametric interval on
-- the function
-- This determines the derivatives in these values if the
-- function is not Cn.
is redefined;
--
-- To help computation of Tolerance
--
-- Evaluation of error, in 2d space, or on rational function, is
-- dificult. The folowing methodes can help
--
--
Resolution(me;
Index : Integer from Standard;
Tol : Real from Standard;
TolU, TolV : out Real from Standard)
---Purpose: Returns the resolutions in the sub-space 2d <Index>
-- This information is usfull to find an good tolerance in
-- 2d approximation.
-- Warning: Used only if Nb2dCurve > 0
is redefined;
GetTolerance(me;
BoundTol, SurfTol, AngleTol : Real;
Tol3d : out Array1OfReal)
---Purpose: Returns the tolerance to reach in approximation
-- to respecte
-- BoundTol error at the Boundary
-- AngleTol tangent error at the Boundary (in radian)
-- SurfTol error inside the surface.
is redefined;
SetTolerance(me : mutable; Tol3d, Tol2d : Real)
---Purpose: Is usfull, if (me) have to be run numerical
-- algorithme to perform D0, D1 or D2
is redefined;
BarycentreOfSurf(me)
---Purpose: Get the barycentre of Surface. An very poor
-- estimation is sufficent. This information is usefull
-- to perform well conditionned rational approximation.
-- Warning: Used only if <me> IsRational
returns Pnt from gp
is redefined;
MaximalSection(me) returns Real
---Purpose: Returns the length of the maximum section. This
-- information is usefull to perform well conditionned rational
-- approximation.
-- Warning: Used only if <me> IsRational
is redefined;
GetMinimalWeight(me; Weigths : out Array1OfReal from TColStd)
---Purpose: Compute the minimal value of weight for each poles
-- of all sections. This information is usefull to
-- perform well conditionned rational approximation.
-- Warning: Used only if <me> IsRational
is redefined;
fields
myLoc : LocationLaw from GeomFill;
mySec : SectionLaw from GeomFill;
myf : Real;
myfOnS : Real;
myRatio: Real;
M, DM, D2M : Mat from gp;
V, DV, D2V : Vec from gp;
end SweepFunction;
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