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-- File: CurveTool.cdl
-- Created: Tue Mar 3 18:07:18 1992
-- Author: Herve LEGRAND
-- <hl@topsn3>
---Copyright: Matra Datavision 1992
deferred generic class CurveTool from LProp (Curve as any;
Pnt as any;
Vec as any)
is
Value(myclass; C : Curve; U : Real; P : out Pnt);
---Purpose: Computes the point <P> of parameter <U> on the curve <C>.
D1 (myclass; C : Curve; U : Real; P : out Pnt; V1 : out Vec);
---Purpose: Computes the point <P> and first derivative <V1> of
-- parameter <U> on the curve <C>.
D2 (myclass; C : Curve; U : Real; P : out Pnt; V1, V2 : out Vec);
---Purpose: Computes the point <P>, the first derivative <V1> and second
-- derivative <V2> of parameter <U> on the curve <C>.
D3 (myclass; C : Curve; U : Real;
P : out Pnt; V1, V2, V3 : out Vec);
---Purpose: Computes the point <P>, the first derivative <V1>, the
-- second derivative <V2> and third derivative <V3> of
-- parameter <U> on the curve <C>.
Continuity(myclass; C : Curve) returns Integer;
---Purpose: returns the order of continuity of the curve <C>.
-- returns 1 : first derivative only is computable
-- returns 2 : first and second derivative only are computable.
-- returns 3 : first, second and third are computable.
FirstParameter(myclass; C : Curve) returns Real;
---Purpose: returns the first parameter bound of the curve.
--
LastParameter(myclass; C : Curve) returns Real;
---Purpose: returns the last parameter bound of the curve.
-- FirstParameter must be less than LastParamenter.
end CurveTool;
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