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122 lines
4.0 KiB
Plaintext
Executable File
122 lines
4.0 KiB
Plaintext
Executable File
-- Created on: 1992-03-09
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-- Created by: Isabelle GRIGNON
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-- Copyright (c) 1992-1999 Matra Datavision
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-- Copyright (c) 1999-2012 OPEN CASCADE SAS
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--
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-- The content of this file is subject to the Open CASCADE Technology Public
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-- License Version 6.5 (the "License"). You may not use the content of this file
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-- except in compliance with the License. Please obtain a copy of the License
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-- at http://www.opencascade.org and read it completely before using this file.
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--
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-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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--
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-- The Original Code and all software distributed under the License is
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-- distributed on an "AS IS" basis, without warranty of any kind, and the
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-- Initial Developer hereby disclaims all such warranties, including without
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-- limitation, any warranties of merchantability, fitness for a particular
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-- purpose or non-infringement. Please see the License for the specific terms
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-- and conditions governing the rights and limitations under the License.
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deferred generic class PathPointTool from IntWalk
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(PathPoint as any)
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---Purpose: Template class to describe the necessary ressources
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-- for a point used as a starting point for a marching
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-- algorithm.
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-- The 'marching algorithm' determines the intersection
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-- between an implicit surface and a parametrized surface.
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-- these points are necessary on an arc of the surface
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uses Pnt from gp,
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Vec from gp,
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Dir2d from gp
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raises OutOfRange from Standard,
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UndefinedDerivative from StdFail
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is
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Value3d(myclass; PStart: PathPoint)
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---Purpose: Returns the 3d coordinates of the starting point.
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returns Pnt from gp;
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Value2d(myclass; PStart: PathPoint; U, V: out Real from Standard);
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---Purpose: Returns the <U, V> parameters which are associated
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-- with <P>
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-- it's the parameters which start the marching algorithm
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IsPassingPnt(myclass; PStart: PathPoint)
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---Purpose: Returns True if the point is a point on a non-oriented
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-- arc, which means that the intersection line does not
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-- stop at such a point but just go through such a point.
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-- IsPassingPnt is True when IsOnArc is True
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returns Boolean from Standard;
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IsTangent(myclass; PStart: PathPoint )
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---Purpose: Returns True if the surfaces are tangent at this point.
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-- IsTangent can be True when IsOnArc is True
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-- if IsPassingPnt is True and IsTangent is True,this point
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-- is a stopped point.
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returns Boolean from Standard;
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Direction3d(myclass; PStart: PathPoint)
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---Purpose: returns the tangent at the intersection in 3d space
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-- associated to <P>
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-- an exception is raised if IsTangent is true.
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returns Vec from gp
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raises UndefinedDerivative from StdFail;
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Direction2d(myclass; PStart: PathPoint)
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---Purpose: returns the tangent at the intersection in the
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-- parametric space of the parametrized surface.This tangent
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-- is associated to the value2d
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-- la tangente a un sens signifiant (indique le sens de chemin
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-- ement)
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-- an exception is raised if IsTangent is true.
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returns Dir2d from gp
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raises UndefinedDerivative from StdFail;
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Multiplicity(myclass; PStart: PathPoint)
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---Purpose: Returns the multiplicity of the point i-e
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-- the number of auxillar parameters associated to the
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-- point which the principal parameters are given by Value2d
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returns Integer from Standard;
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Parameters(myclass; PStart: PathPoint;
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Mult: Integer from Standard;
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U, V: out Real from Standard)
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---Purpose: Parametric coordinates associated to the multiplicity.
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-- An exception is raised if Mult<=0 or Mult>multiplicity.
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raises OutOfRange from Standard;
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end PathPointTool;
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