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-- File: Geom2dLProp_CurAndInf2d.cdl
-- Created: Tue Sep 6 14:37:18 1994
-- Author: Yves FRICAUD
-- <yfr@ecolox>
---Copyright: Matra Datavision 1994
class CurAndInf2d from Geom2dLProp inherits CurAndInf from LProp
---Purpose: An algorithm for computing local properties of a curve.
-- These properties include:
-- - the maximum and minimum curvatures
-- - the inflection points.
-- A CurAndInf2d object provides the framework for:
-- - defining the curve to be analyzed
-- - implementing the computation algorithms
-- - consulting the results.
uses
Curve from Geom2d
is
Create;
--- Purpose: Initializes the framework.
-- Note: The curve on which the local properties are
-- computed is defined using one of the following
-- functions: Perform, PerformCurExt or PerformInf.
Perform (me : in out; C : Curve)
---Purpose: For the curve C, Computes both the
-- inflection points and the maximum and minimum curvatures.
is static;
PerformCurExt (me : in out; C : Curve)
---Purpose: For the curve C, Computes the locals extremas of curvature.
is static;
PerformInf (me : in out; C : Curve)
---Purpose: For the curve C, Computes the inflections.
-- After computation, the following functions can be used:
-- - IsDone to check if the computation was successful
-- - NbPoints to obtain the number of computed particular points
-- - Parameter to obtain the parameter on the curve for
-- each particular point
-- - Type to check if the point is an inflection point or an
-- extremum of curvature of the curve C.
-- Warning
-- These functions can be used to analyze a series of
-- curves, however it is necessary to clear the table of
-- results between each computation.
is static;
IsDone (me) returns Boolean
---Purpose: True if the solutions are found.
is static;
fields
isDone : Boolean from Standard;
end CurAndInf2d;
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