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-- File: Blend_AppFunction.cdl
-- Created: Mon Sep 13 16:54:05 1993
-- Author: Jacques GOUSSARD
-- <jag@topsn2>
---Copyright: Matra Datavision 1993
deferred class AppFunction from Blend
inherits FunctionSetWithDerivatives from math
---Purpose: Deferred class for a function used to compute a blending
-- surface between two surfaces, using a guide line.
-- The vector <X> used in Value, Values and Derivatives methods
-- has to be the vector of the parametric coordinates U1,V1,
-- U2,V2, of the extremities of a section on the first and
-- second surface.
uses Vector from math,
Matrix from math,
Pnt from gp,
Shape from GeomAbs,
Point from Blend,
Array1OfPnt from TColgp,
Array1OfVec from TColgp,
Array1OfPnt2d from TColgp,
Array1OfVec2d from TColgp,
Array1OfReal from TColStd,
Array1OfInteger from TColStd
raises DomainError from Standard
is
NbVariables(me)
---Purpose: returns the number of variables of the function.
returns Integer from Standard
is deferred;
NbEquations(me)
---Purpose: returns the number of equations of the function.
returns Integer from Standard
is deferred;
Value(me: in out; X: Vector; F: out Vector)
---Purpose: computes the values <F> of the Functions for the
-- variable <X>.
-- Returns True if the computation was done successfully,
-- False otherwise.
returns Boolean from Standard
is deferred;
Derivatives(me: in out; X: Vector; D: out Matrix)
---Purpose: returns the values <D> of the derivatives for the
-- variable <X>.
-- Returns True if the computation was done successfully,
-- False otherwise.
returns Boolean from Standard
is deferred;
Values(me: in out; X: Vector; F: out Vector; D: out Matrix)
---Purpose: returns the values <F> of the functions and the derivatives
-- <D> for the variable <X>.
-- Returns True if the computation was done successfully,
-- False otherwise.
returns Boolean from Standard
is deferred;
Set(me: in out; Param: Real from Standard)
---Purpose: Sets the value of the parameter along the guide line.
-- This determines the plane in which the solution has
-- to be found.
is deferred;
Set(me: in out; First, Last: Real from Standard)
---Purpose: Sets the bounds of the parametric interval on
-- the guide line.
-- This determines the derivatives in these values if the
-- function is not Cn.
is deferred;
GetTolerance(me; Tolerance: out Vector from math; Tol: Real from Standard)
---Purpose: Returns in the vector Tolerance the parametric tolerance
-- for each of the 4 variables;
-- Tol is the tolerance used in 3d space.
is deferred;
GetBounds(me; InfBound,SupBound: out Vector from math)
---Purpose: Returns in the vector InfBound the lowest values allowed
-- for each of the 4 variables.
-- Returns in the vector SupBound the greatest values allowed
-- for each of the 4 variables.
is deferred;
IsSolution(me: in out; Sol: Vector from math; Tol: Real from Standard)
---Purpose: Returns Standard_True if Sol is a zero of the function.
-- Tol is the tolerance used in 3d space.
-- The computation is made at the current value of
-- the parameter on the guide line.
returns Boolean from Standard
is deferred;
GetMinimalDistance(me)
---Purpose: Returns the minimal Distance beetween two
-- extremitys of calculed sections.
returns Real from Standard
is deferred;
Pnt1(me)
---Purpose: Returns the point on the first support.
---C++: return const &
returns Pnt from gp
is deferred;
Pnt2(me)
---Purpose: Returns the point on the first support.
---C++: return const &
returns Pnt from gp
is deferred;
-- Methods for the approximation
--
IsRational(me) returns Boolean
---Purpose: Returns if the section is rationnal
is deferred;
GetSectionSize(me) returns Real
---Purpose: Returns the length of the maximum section
is deferred;
GetMinimalWeight(me; Weigths : out Array1OfReal from TColStd)
---Purpose: Compute the minimal value of weight for each poles
-- of all sections.
is deferred;
NbIntervals(me; S : Shape from GeomAbs) returns Integer
---Purpose: Returns the number of intervals for continuity
-- <S>. May be one if Continuity(me) >= <S>
is deferred;
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 deferred;
GetShape(me: in out;
NbPoles : out Integer from Standard;
NbKnots : out Integer from Standard;
Degree : out Integer from Standard;
NbPoles2d : out Integer from Standard)
is deferred;
GetTolerance(me;
BoundTol, SurfTol, AngleTol : Real;
Tol3d : out Vector;
Tol1D : out Vector )
---Purpose: Returns the tolerance to reach in approximation
-- to respecte
-- BoundTol error at the Boundary
-- AngleTol tangent error at the Boundary
-- SurfTol error inside the surface.
is deferred;
Knots(me: in out; TKnots: out Array1OfReal from TColStd)
is deferred;
Mults(me: in out; TMults: out Array1OfInteger from TColStd)
is deferred;
Section(me: in out; P: Point from Blend;
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: Used for the first and last section
-- The method returns Standard_True if the derivatives
-- are computed, otherwise it returns Standard_False.
returns Boolean from Standard
is deferred;
Section(me: in out; P: Point from Blend;
Poles : out Array1OfPnt from TColgp;
Poles2d : out Array1OfPnt2d from TColgp;
Weigths : out Array1OfReal from TColStd)
is deferred;
Section(me: in out; P: Point from Blend;
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: Used for the first and last section
-- The method returns Standard_True if the derivatives
-- are computed, otherwise it returns Standard_False.
returns Boolean from Standard
is deferred;
Resolution(me;
IC2d : Integer from Standard;
Tol : Real from Standard;
TolU, TolV : out Real from Standard)
is deferred;
-- Static function for approx
Parameter(me; P: Point from Blend)
---Purpose: Returns the parameter of the point P. Used to
-- impose the parameters in the approximation.
returns Real from Standard
is static;
end AppFunction;
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