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-- File: GeomConvert_ApproxCurve.cdl
-- Created: Thu Sep 11 15:08:38 1997
-- Author: Roman BORISOV
-- <rbv@toctox.nnov.matra-dtv.fr>
---Copyright: Matra Datavision 1997
class ApproxCurve from Geom2dConvert
---Purpose: A framework to convert a 2D curve to a BSpline.
-- This is done by approximation within a given tolerance.
uses
Curve from Geom2d,
BSplineCurve from Geom2d,
Shape from GeomAbs,
OutOfRange from Standard
raises OutOfRange from Standard
is
Create (Curve: Curve from Geom2d;
Tol2d: Real;
Order: Shape from GeomAbs;
MaxSegments: Integer;
MaxDegree: Integer) returns ApproxCurve from Geom2dConvert;
---Purpose: Constructs an approximation framework defined by
-- - the 2D conic Curve
-- - the tolerance value Tol2d
-- - the degree of continuity Order
-- - the maximum number of segments allowed MaxSegments
-- - the highest degree MaxDegree which the
-- polynomial defining the BSpline is allowed to have.
Curve(me) returns BSplineCurve from Geom2d;
---Purpose: Returns the 2D BSpline curve resulting from the
-- approximation algorithm.
IsDone(me) returns Boolean from Standard;
---Purpose: returns Standard_True if the approximation has
-- been done with within requiered tolerance
HasResult(me) returns Boolean;
---Purpose: returns Standard_True if the approximation did come out
-- with a result that is not NECESSARELY within the required tolerance
MaxError(me) returns Real from Standard;
---Purpose: Returns the greatest distance between a point on the
-- source conic and the BSpline curve resulting from the
-- approximation. (>0 when an approximation
-- has been done, 0 if no approximation)
Dump(me; o: in out OStream);
---Purpose: Print on the stream o information about the object
fields
myCurve : Curve from Geom2d;
myIsDone : Boolean from Standard;
myHasResult : Boolean from Standard;
myBSplCurve : BSplineCurve from Geom2d;
myMaxError : Real from Standard;
end ApproxCurve;
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