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1 | -- Created on: 1995-02-24 |
2 | -- Created by: Jacques GOUSSARD |
3 | -- Copyright (c) 1995-1999 Matra Datavision |
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4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | -- |
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6 | -- This file is part of Open CASCADE Technology software library. |
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7 | -- |
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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 |
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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. |
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13 | -- |
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14 | -- Alternatively, this file may be used under the terms of Open CASCADE |
15 | -- commercial license or contractual agreement. |
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16 | |
17 | generic class SurfProps from Contap |
18 | (TheSurface as any; |
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19 | TheSurfaceTool as any) |
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20 | |
21 | ---Purpose: Internal tool used to compute the normal and its |
22 | -- derivatives. |
23 | |
24 | uses Pnt from gp, |
25 | Vec from gp |
26 | |
27 | is |
28 | |
29 | Normale(myclass; S: TheSurface; U,V: Real from Standard; |
30 | P: out Pnt from gp; |
31 | N: out Vec from gp); |
32 | |
33 | ---Purpose: Computes the point <P>, and normal vector <N> on |
34 | -- <S> at parameters U,V. |
35 | |
36 | |
37 | |
38 | DerivAndNorm(myclass; S: TheSurface; U,V: Real from Standard; |
39 | P : out Pnt from gp; |
40 | d1u,d1v: out Vec from gp; |
41 | N : out Vec from gp); |
42 | |
43 | ---Purpose: Computes the point <P>, and normal vector <N> on |
44 | -- <S> at parameters U,V. |
45 | |
46 | |
47 | |
48 | NormAndDn(myclass; S: TheSurface; U,V: Real from Standard; |
49 | P : out Pnt from gp; |
50 | N,Dnu,Dnv: out Vec from gp); |
51 | |
52 | ---Purpose: Computes the point <P>, normal vector <N>, and its |
53 | -- derivatives <Dnu> and <Dnv> on <S> at parameters U,V. |
54 | |
55 | |
56 | end SurfProps; |