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-- File: CurveTool.cdl
-- Created: Wed Aug 26 15:32:21 1992
-- Author: Jean-Claude Vauthier
---Copyright: Matra Datavision 1992
deferred generic class CurveTool from GProp (Curve as any)
--- Purpose :
-- This template defines the minimum of methods required
-- to compute the global properties of a C1 parametric
-- curve in 3d space with the algorithmes of package GProp.
-- To compute the global properties of your curves, you
-- have to define your own "CurveTool" using this template.
--
-- Curve must be a bounded curve of continuity C1 defined in 3d
-- space.
uses Pnt from gp,
Vec from gp
is
FirstParameter (myclass; C : Curve) returns Real;
--- Purpose :
-- Returns the parametric value of the start point of
-- the curve. The curve is oriented from the start point
-- to the end point.
LastParameter (myclass; C : Curve) returns Real;
--- Purpose :
-- Returns the parametric value of the end point of
-- the curve. The curve is oriented from the start point
-- to the end point.
IntegrationOrder (myclass; C : Curve) returns Integer;
--- Purpose :
-- Returns the number of Gauss points required to do
-- the integration with a good accuracy using the
-- Gauss method. For a polynomial curve of degree n
-- the maxima of accuracy is obtained with an order
-- of integration equal to 2*n-1.
Value (myclass; C : Curve; U : Real) returns Pnt;
--- Purpose : Returns the point of parameter U on the loaded curve.
D1 (myclass; C : Curve; U: Real; P: out Pnt; V1: out Vec);
--- Purpose :
-- Returns the point of parameter U and the first derivative
-- at this point.
end CurveTool;
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