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-- File: Law_Interpolate.cdl
-- Created: Wed Nov 15 17:30:50 1995
-- Author: Laurent BOURESCHE
-- <lbo@phylox>
---Copyright: Matra Datavision 1995
--- cut and past from GeomAPI_Interpolate in order
-- to provide 1D interpolation.
class Interpolate from Law
---Purpose: This class is used to interpolate a BsplineCurve
-- passing through an array of points, with a C2
-- Continuity if tangency is not requested at the point.
-- If tangency is requested at the point the continuity
-- will be C1. If Perodicity is requested the curve will
-- be closed and the junction will be the first point
-- given. The curve will than be only C1
--
--
uses
Array1OfReal from TColStd,
HArray1OfReal from TColStd,
HArray1OfBoolean from TColStd,
BSpline from Law
raises
NotDone from StdFail,
ConstructionError from Standard
is
Create(Points : HArray1OfReal from TColStd;
PeriodicFlag : Boolean from Standard;
Tolerance : Real)
---Purpose: Tolerance is to check if the points are not too close
-- to one an other. It is also used to check if the
-- tangent vector is not too small. There should be at
-- least 2 points. If PeriodicFlag is True then the curve
-- will be periodic be periodic
returns Interpolate from Law
raises ConstructionError from Standard;
Create(Points : HArray1OfReal from TColStd;
Parameters : HArray1OfReal from TColStd;
PeriodicFlag : Boolean from Standard;
Tolerance : Real from Standard)
---Purpose: Tolerance is to check if the points are not too close
-- to one an other. It is also used to check if the
-- tangent vector is not too small. There should be at
-- least 2 points. If PeriodicFlag is True then the curve
-- will be periodic be periodic
-- Warning: There should be as many parameters as there are points
-- except if PeriodicFlag is True then there should be
-- one more parameter to close the curve
returns Interpolate from Law
raises ConstructionError from Standard;
Load(me : in out;
InitialTangent : Real from Standard;
FinalTangent : Real from Standard)
---Purpose: loads initial and final tangents if any.
is static;
Load(me : in out;
Tangents : Array1OfReal from TColStd;
TangentFlags : HArray1OfBoolean from TColStd)
---Purpose: loads the tangents. We should have as many tangents as
-- they are points in the array if TangentFlags.Value(i)
-- is Standard_True use the tangent Tangents.Value(i)
-- otherwise the tangent is not constrained.
--
is static;
ClearTangents(me : in out);
---Purpose: Clears the tangents if any
Perform(me : in out);
---Purpose: Makes the interpolation
Curve(me)
---C++: return const &
returns BSpline from Law
raises NotDone from StdFail
is static;
IsDone(me)
returns Boolean from Standard
is static;
PerformNonPeriodic(me : in out)
---Purpose: Interpolates in a non periodic fashion.
is private;
PerformPeriodic(me : in out)
---Purpose: Interpolates in a C1 periodic fashion.
is private;
fields
myTolerance : Real from Standard;
-- the 3D tolerance to check for degenerate points
myPoints : HArray1OfReal from TColStd;
-- the points to interpolates
myIsDone : Boolean from Standard;
-- the algorithm did complete OK if Standard_True
myCurve : BSpline from Law;
-- the interpolated curve
myTangents : HArray1OfReal from TColStd;
-- the tangents only defined at slot i if
-- myTangenFlags->Value(i) is Standard_True
myTangentFlags : HArray1OfBoolean from TColStd;
-- the flags defining the tangents
myParameters : HArray1OfReal from TColStd;
-- the parameters used for the cubic interpolation
myPeriodic : Boolean from Standard;
-- if Standard_True the curve will be periodic
myTangentRequest : Boolean from Standard;
-- Tangents are given if True False otherwise
end Interpolate from Law;
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