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-- File: Geom2dAPI_PointsToBSpline.cdl
-- Created: Wed Mar 23 15:13:17 1994
-- Author: Bruno DUMORTIER
-- <dub@fuegox>
---Copyright: Matra Datavision 1994
class PointsToBSpline from Geom2dAPI
---Purpose: This class is used to approximate a BsplineCurve
-- passing through an array of points, with a given
-- Continuity.
-- Describes functions for building a 2D BSpline
-- curve which approximates a set of points.
-- A PointsToBSpline object provides a framework for:
-- - defining the data of the BSpline curve to be built,
-- - implementing the approximation algorithm, and
-- - consulting the results
uses
Array1OfReal from TColStd,
Array1OfPnt2d from TColgp,
Shape from GeomAbs,
BSplineCurve from Geom2d,
ParametrizationType from Approx
raises
NotDone from StdFail,
OutOfRange from Standard
is
Create
---Purpose: Constructs an empty approximation algorithm.
-- Use an Init function to define and build the BSpline curve.
returns PointsToBSpline from Geom2dAPI;
Create(Points : Array1OfPnt2d from TColgp;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-6)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point. The resulting BSpline will have
-- the following properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
returns PointsToBSpline from Geom2dAPI;
Create(YValues : Array1OfReal from TColStd;
X0 : Real from Standard;
DX : Real from Standard;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-6)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point. Of coordinates :
--
-- X = X0 + DX * (i-YValues.Lower())
-- Y = YValues(i)
--
-- With i in the range YValues.Lower(), YValues.Upper()
--
-- The BSpline will be parametrized from t = X0 to
-- X0 + DX * (YValues.Upper() - YValues.Lower())
--
-- And will satisfy X(t) = t
--
-- The resulting BSpline will have
-- the following properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
returns PointsToBSpline from Geom2dAPI;
Create(Points : Array1OfPnt2d from TColgp;
ParType : ParametrizationType from Approx;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-3)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point. The resulting BSpline will have
-- the following properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
returns PointsToBSpline from Geom2dAPI;
Create(Points : Array1OfPnt2d from TColgp;
Parameters : Array1OfReal from TColStd;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-3)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point, which parameters are given by the
-- array <Parameters>.
-- The resulting BSpline will have the following
-- properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
returns PointsToBSpline from Geom2dAPI
raises OutOfRange from Standard;
Create(Points : Array1OfPnt2d from TColgp;
Weight1 : Real from Standard;
Weight2 : Real from Standard;
Weight3 : Real from Standard;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol3D : Real from Standard = 1.0e-3)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point using variational smoothing algorithm,
-- which tries to minimize additional criterium:
-- Weight1*CurveLength + Weight2*Curvature + Weight3*Torsion
---Level: Public
returns PointsToBSpline from Geom2dAPI;
Init(me : in out;
Points : Array1OfPnt2d from TColgp;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-6)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point. The resulting BSpline will have
-- the following properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
is static;
Init(me : in out;
YValues : Array1OfReal from TColStd;
X0 : Real from Standard;
DX : Real from Standard;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-6)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point. Of coordinates :
--
-- X = X0 + DX * (i-YValues.Lower())
-- Y = YValues(i)
--
-- With i in the range YValues.Lower(), YValues.Upper()
--
-- The BSpline will be parametrized from t = X0 to
-- X0 + DX * (YValues.Upper() - YValues.Lower())
--
-- And will satisfy X(t) = t
--
-- The resulting BSpline will have
-- the following properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
is static;
Init(me : in out;
Points : Array1OfPnt2d from TColgp;
ParType : ParametrizationType from Approx;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-3)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point. The resulting BSpline will have
-- the following properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
is static;
Init(me : in out;
Points : Array1OfPnt2d from TColgp;
Parameters : Array1OfReal from TColStd;
DegMin : Integer from Standard = 3;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-3)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point, which parameters are given by the
-- array <Parameters>.
-- The resulting BSpline will have the following
-- properties:
-- 1- his degree will be in the range [Degmin,Degmax]
-- 2- his continuity will be at least <Continuity>
-- 3- the distance from the point <Points> to the
-- BSpline will be lower to Tol2D
---Level: Public
is static;
Init(me : in out;
Points : Array1OfPnt2d from TColgp;
Weight1 : Real from Standard;
Weight2 : Real from Standard;
Weight3 : Real from Standard;
DegMax : Integer from Standard = 8;
Continuity : Shape from GeomAbs = GeomAbs_C2;
Tol2D : Real from Standard = 1.0e-3)
---Purpose: Approximate a BSpline Curve passing through an
-- array of Point using variational smoothing algorithm,
-- which tries to minimize additional criterium:
-- Weight1*CurveLength + Weight2*Curvature + Weight3*Torsion
---Level: Public
is static;
Curve(me)
---Purpose: Returns the approximate BSpline Curve
---Level: Public
returns BSplineCurve from Geom2d
---C++: return const &
---C++: alias "Standard_EXPORT operator Handle(Geom2d_BSplineCurve)() const;"
raises
NotDone from StdFail
is static;
IsDone(me)
returns Boolean from Standard;
fields
myIsDone : Boolean from Standard;
myCurve : BSplineCurve from Geom2d;
end PointsToBSpline;
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