c827ea3a |
1 | // Created on: 2014-10-15 |
2 | // Created by: Denis Bogolepov |
3 | // Copyright (c) 2014 OPEN CASCADE SAS |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
7 | // This library is free software; you can redistribute it and/or modify it under |
8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
9 | // by the Free Software Foundation, with special exception defined in the file |
10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
11 | // distribution for complete text of the license and disclaimer of any warranty. |
12 | // |
13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
15 | |
16 | #include <OpenGl_Sphere.hxx> |
17 | |
18 | // ======================================================================= |
19 | // function : OpenGl_Sphere |
20 | // purpose : |
21 | // ======================================================================= |
22 | OpenGl_Sphere::OpenGl_Sphere() |
23 | : myRadius (1.0f) |
24 | { |
25 | // |
26 | } |
27 | |
28 | // ======================================================================= |
29 | // function : Init |
30 | // purpose : |
31 | // ======================================================================= |
32 | Standard_Boolean OpenGl_Sphere::Init (const Standard_ShortReal theRadius, |
33 | const Standard_Integer theNbSlices, |
34 | const Standard_Integer theNbStacks) |
35 | { |
36 | myRadius = theRadius; |
37 | return OpenGl_Quadric::init (theNbSlices, theNbStacks); |
38 | } |
39 | |
40 | // ======================================================================= |
41 | // function : evalVertex |
42 | // purpose : |
43 | // ======================================================================= |
44 | OpenGl_Vec3 OpenGl_Sphere::evalVertex (const Standard_ShortReal theU, |
45 | const Standard_ShortReal theV) const |
46 | { |
47 | const Standard_ShortReal aU = static_cast<Standard_ShortReal> (theU * M_PI * 2.0); |
48 | const Standard_ShortReal aV = static_cast<Standard_ShortReal> (theV * M_PI); |
49 | return OpenGl_Vec3 (myRadius * cosf (aU) * sinf (aV), |
50 | -myRadius * sinf (aU) * sinf (aV), |
51 | myRadius * cosf (aV)); |
52 | } |
53 | |
54 | // ======================================================================= |
55 | // function : evalNormal |
56 | // purpose : |
57 | // ======================================================================= |
58 | OpenGl_Vec3 OpenGl_Sphere::evalNormal (const Standard_ShortReal theU, |
59 | const Standard_ShortReal theV) const |
60 | { |
61 | const Standard_ShortReal aU = static_cast<Standard_ShortReal> (theU * M_PI * 2.0); |
62 | const Standard_ShortReal aV = static_cast<Standard_ShortReal> (theV * M_PI); |
63 | return OpenGl_Vec3 (cosf (aU) * sinf (aV), |
64 | -sinf (aU) * sinf (aV), |
65 | cosf (aV)); |
66 | } |