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-- File: AppCont_LeastSquare.cdl
-- Created: Thu Apr 22 14:05:49 1993
-- Author: Laurent PAINNOT
-- <lpa@phobox>
---Copyright: Matra Datavision 1993
generic class LeastSquare from AppCont(MultiLine as any;
LineTool as any)
---as TheToolLine(MultiLine)
---Purpose:
uses Matrix from math,
Vector from math,
Constraint from AppParCurves,
MultiCurve from AppParCurves
raises NotDone from StdFail,
OutOfRange from Standard,
DimensionError from Standard
is
Create(SSP: MultiLine; U0, U1: Real; FirstCons, LastCons: Constraint;
Deg: Integer; NbPoints: Integer = 24)
---Purpose: given a continous MultiLine, this algorithm computes
-- the approximation into Bezier curves.
-- NbPoints points are taken on the initial MultiLine for
-- minimizing the surface between the MultiLine and the
-- Bezier curves doing the approximation.
-- The first point will be the point of parameter U0 with
-- a constraint FirstCons.
-- The last point will be the point of parameter U1 with
-- a constraint LastCons.
returns LeastSquare from AppCont
raises DimensionError from Standard;
IsDone(me)
---Purpose: returns True if all has been correctly done.
returns Boolean
is static;
Value(me: in out)
---Purpose: returns the result of the approximation, i.e. a
-- MultiCurve.
-- An exception is raised if NotDone.
---C++: return const &
returns MultiCurve from AppParCurves
raises NotDone from StdFail
is static;
NbBColumns(me; SSP: MultiLine)
---Purpose: is internally used by the constuctor.
returns Integer
is static protected;
Error(me; F: in out Real; MaxE3d, MaxE2d: in out Real)
---Purpose: F is the sum of the square errors at each of the
-- NbPoints of the MultiLine.
-- MaxE3d is the maximum 3d value of these errors.
-- MaxE2d is the maximum 2d value of these errors.
-- An exception is raised if NotDone.
raises NotDone from StdFail
is static;
fields
Done: Boolean;
SCU: MultiCurve from AppParCurves;
Degre: Integer;
Nbdiscret: Integer;
nbP: Integer;
nbP2d: Integer;
Points: Matrix;
Poles: Matrix;
myParam: Vector;
VB: Matrix;
end LeastSquare from AppCont;
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