| 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_Cylinder.hxx> |
| 17 | |
| 18 | // ======================================================================= |
| 19 | // function : OpenGl_Cylinder |
| 20 | // purpose : |
| 21 | // ======================================================================= |
| 22 | OpenGl_Cylinder::OpenGl_Cylinder() |
| 23 | : myBotRad (1.0f), |
| 24 | myTopRad (1.0f), |
| 25 | myHeight (1.0f) |
| 26 | { |
| 27 | // |
| 28 | } |
| 29 | |
| 30 | // ======================================================================= |
| 31 | // function : Init |
| 32 | // purpose : |
| 33 | // ======================================================================= |
| 34 | Standard_Boolean OpenGl_Cylinder::Init (const Standard_ShortReal theBotRad, |
| 35 | const Standard_ShortReal theTopRad, |
| 36 | const Standard_ShortReal theHeight, |
| 37 | const Standard_Integer theNbSlices, |
| 38 | const Standard_Integer theNbStacks) |
| 39 | { |
| 40 | myBotRad = theBotRad; |
| 41 | myTopRad = theTopRad; |
| 42 | myHeight = theHeight; |
| 43 | return OpenGl_Quadric::init (theNbSlices, theNbStacks); |
| 44 | } |
| 45 | |
| 46 | // ======================================================================= |
| 47 | // function : evalVertex |
| 48 | // purpose : |
| 49 | // ======================================================================= |
| 50 | OpenGl_Vec3 OpenGl_Cylinder::evalVertex (const Standard_ShortReal theU, |
| 51 | const Standard_ShortReal theV) const |
| 52 | { |
| 53 | const Standard_ShortReal aU = static_cast<Standard_ShortReal> (theU * M_PI * 2.0); |
| 54 | const Standard_ShortReal aRadius = myBotRad + (myTopRad - myBotRad) * theV; |
| 55 | return OpenGl_Vec3 (cosf (aU) * aRadius, |
| 56 | sinf (aU) * aRadius, |
| 57 | theV * myHeight); |
| 58 | } |
| 59 | |
| 60 | // ======================================================================= |
| 61 | // function : evalNormal |
| 62 | // purpose : |
| 63 | // ======================================================================= |
| 64 | OpenGl_Vec3 OpenGl_Cylinder::evalNormal (const Standard_ShortReal theU, |
| 65 | const Standard_ShortReal /*theV*/) const |
| 66 | { |
| 67 | const Standard_ShortReal aU = static_cast<Standard_ShortReal> (theU * M_PI * 2.0); |
| 68 | return OpenGl_Vec3 (cosf (aU) * myHeight, |
| 69 | sinf (aU) * myHeight, |
| 70 | myBotRad - myTopRad).Normalized(); |
| 71 | } |
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