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-- File: FEmTool_ElementsOfRefMatrix.cdl
-- Created: Tue Nov 10 11:35:26 1998
-- Author: Igor FEOKTISTOV
-- <ifv@paradox.nnov.matra-dtv.fr>
---Copyright: Matra Datavision 1998
class ElementsOfRefMatrix from FEmTool inherits FunctionSet from math
---Purpose: this class describes the functions needed for
-- calculating matrix elements of RefMatrix for linear
-- criteriums (Tension, Flexsion and Jerk).
-- Each function from set gives value Pi(u)'*Pj(u)' or
-- Pi(u)''*Pj(u)'' or Pi(u)'''*Pj(u)''' for each i and j,
-- where Pi(u) is i-th basis function of expansion and
-- (') means derivative.
uses
Vector from math,
Base from PLib
raises
ConstructionError from Standard
is
Create(TheBase : Base from PLib; DerOrder : Integer from Standard)
-- DerOrder is order of derivative (1, 2, 3)
returns ElementsOfRefMatrix from FEmTool
raises ConstructionError from Standard;
-- if DerOrder is not valid
NbVariables(me)
---Purpose: returns the number of variables of the function.
-- It is supposed that NbVariables = 1.
returns Integer;
NbEquations(me)
---Purpose: returns the number of equations of the function.
returns Integer;
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.
-- F contains results only for i<=j in following order:
-- P0*P0, P0*P1, P0*P2... P1*P1, P1*P2,... (upper triangle of
-- matrix {PiPj})
returns Boolean;
fields
myBase : Base from PLib;
myDerOrder : Integer;
myNbEquations : Integer;
end ElementsOfRefMatrix;
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