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70 lines
2.4 KiB
Plaintext
Executable File
70 lines
2.4 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 LoopPointTool from IntWalk
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(LoopPoint as any)
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---Purpose: template class to describe the necessary ressources
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-- for a point usedas 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 point are inside the surface not on the boundaries.
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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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is
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Value3d(myclass; PStart: LoopPoint)
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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: LoopPoint; 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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Direction3d(myclass; PStart: LoopPoint)
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---Purpose: returns the tangent at the intersectin in 3d space
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-- associated to <P>
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returns Vec from gp;
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Direction2d(myclass; PStart: LoopPoint)
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---Purpose: returns the tangent at the intersectin 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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returns Dir2d from gp;
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end LoopPointTool;
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