| 1 | // Created on: 2016-07-07 |
| 2 | // Copyright (c) 2016 OPEN CASCADE SAS |
| 3 | // Created by: Oleg AGASHIN |
| 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 <BRepMesh_SphereRangeSplitter.hxx> |
| 17 | #include <GCPnts_TangentialDeflection.hxx> |
| 18 | |
| 19 | //======================================================================= |
| 20 | // Function: GenerateSurfaceNodes |
| 21 | // Purpose : |
| 22 | //======================================================================= |
| 23 | Handle(IMeshData::ListOfPnt2d) BRepMesh_SphereRangeSplitter::GenerateSurfaceNodes( |
| 24 | const IMeshTools_Parameters& theParameters) const |
| 25 | { |
| 26 | // Calculate parameters for iteration in V direction |
| 27 | Standard_Real aStep = 0.7 * GCPnts_TangentialDeflection::ArcAngularStep( |
| 28 | GetDFace()->GetSurface()->Sphere().Radius(), GetDFace()->GetDeflection(), |
| 29 | theParameters.Angle, theParameters.MinSize); |
| 30 | |
| 31 | const std::pair<Standard_Real, Standard_Real>* aRange[2] = { |
| 32 | &GetRangeV(), |
| 33 | &GetRangeU() |
| 34 | }; |
| 35 | |
| 36 | std::pair<Standard_Real, Standard_Real> aStepAndOffset[2]; |
| 37 | computeStep(*aRange[0], aStep, aStepAndOffset[0]); |
| 38 | computeStep(*aRange[1], aStep, aStepAndOffset[1]); |
| 39 | |
| 40 | const Handle(NCollection_IncAllocator) aTmpAlloc = |
| 41 | new NCollection_IncAllocator(IMeshData::MEMORY_BLOCK_SIZE_HUGE); |
| 42 | Handle(IMeshData::ListOfPnt2d) aNodes = new IMeshData::ListOfPnt2d(aTmpAlloc); |
| 43 | |
| 44 | const Standard_Real aHalfDu = aStepAndOffset[1].first * 0.5; |
| 45 | Standard_Boolean Shift = Standard_False; |
| 46 | Standard_Real aPasV = aRange[0]->first + aStepAndOffset[0].first; |
| 47 | for (; aPasV < aStepAndOffset[0].second; aPasV += aStepAndOffset[0].first) |
| 48 | { |
| 49 | Shift = !Shift; |
| 50 | const Standard_Real d = (Shift) ? aHalfDu : 0.; |
| 51 | Standard_Real aPasU = aRange[1]->first + d; |
| 52 | for (; aPasU < aStepAndOffset[1].second; aPasU += aStepAndOffset[1].first) |
| 53 | { |
| 54 | aNodes->Append(gp_Pnt2d(aPasU, aPasV)); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | return aNodes; |
| 59 | } |