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[occt.git] / src / CSLib / CSLib_DerivativeStatus.hxx
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42cf5bc1 1// Created on: 1991-09-09
2// Created by: Michel Chauvat
3// Copyright (c) 1991-1999 Matra Datavision
4// Copyright (c) 1999-2014 OPEN CASCADE SAS
5//
6// This file is part of Open CASCADE Technology software library.
7//
8// This library is free software; you can redistribute it and/or modify it under
9// the terms of the GNU Lesser General Public License version 2.1 as published
10// by the Free Software Foundation, with special exception defined in the file
11// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12// distribution for complete text of the license and disclaimer of any warranty.
13//
14// Alternatively, this file may be used under the terms of Open CASCADE
15// commercial license or contractual agreement.
16
17#ifndef _CSLib_DerivativeStatus_HeaderFile
18#define _CSLib_DerivativeStatus_HeaderFile
19
20
21//! D1uIsNull : ||D1U|| <= Resolution
22//!
23//! D1vIsNull : ||D1V|| <= Resolution
24//!
25//! D1IsNull : the first derivatives in the U and V parametric
26//! directions have null length :
27//! ||D1U|| <= Resolution and ||D1V|| <= Resolution
28//!
29//! D1uD1vRatioIsNull : the first derivative in the U direction has
30//! null length by comparison with the derivative
31//! in the V direction
32//! ||D1U|| / ||D1V|| <= RealEpsilon
33//!
34//! D1vD1uRatioIsNull : the first derivative in the V direction has
35//! null length by comparison with the derivative
36//! in the U direction
37//! ||D1V|| / ||D1U|| <= RealEpsilon
38//!
39//! D1uIsParallelD1v : the angle between the derivatives in the U and
40//! V direction is null (tolerance criterion given
41//! as input data)
42enum CSLib_DerivativeStatus
43{
44CSLib_Done,
45CSLib_D1uIsNull,
46CSLib_D1vIsNull,
47CSLib_D1IsNull,
48CSLib_D1uD1vRatioIsNull,
49CSLib_D1vD1uRatioIsNull,
50CSLib_D1uIsParallelD1v
51};
52
53#endif // _CSLib_DerivativeStatus_HeaderFile