mirror of
https://git.salome-platform.org/gitpub/modules/geom.git
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267 lines
8.0 KiB
C++
267 lines
8.0 KiB
C++
// Copyright (C) 2007-2020 CEA/DEN, EDF R&D, OPEN CASCADE
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//
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// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
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// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
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//
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// File : Sketcher_Utils.cxx
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// Author : Sergey KHROMOV
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// Module : GEOM
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#include "Sketcher_Utils.hxx"
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#include <BRepBuilderAPI_MakeEdge.hxx>
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#include <BRepBuilderAPI_MakeVertex.hxx>
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#include <BRepBuilderAPI_MakeWire.hxx>
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#include <ElSLib.hxx>
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#include <GeomAPI_Interpolate.hxx>
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#include <TColgp_Array1OfVec.hxx>
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#include <TColgp_HArray1OfPnt.hxx>
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#include <TColStd_HArray1OfBoolean.hxx>
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#include <TopoDS_Wire.hxx>
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const double POINT_CONFUSION_TOLERANCE = 0.0001;
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//=======================================================================
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// function : MakePolyline
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// purpose :
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//=======================================================================
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TopoDS_Shape Sketcher_Utils::MakePolyline
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(const std::list <double> &theCoords2D,
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const Standard_Boolean IsClosed,
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const gp_Ax3 &thePlane)
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{
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std::list <gp_Pnt> aPoints;
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TopoDS_Shape aResult;
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To3D(theCoords2D, thePlane, aPoints);
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Standard_Integer aNbPnts = aPoints.size();
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if (aNbPnts > 1) {
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if (IsClosed &&
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aPoints.front().IsEqual(aPoints.back(), POINT_CONFUSION_TOLERANCE)) {
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// The polyline should be closed, first and last points are confused.
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// Remove the last point.
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aPoints.pop_back();
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--aNbPnts;
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}
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}
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if (aNbPnts == 1) {
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// The result is vertex.
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aResult = BRepBuilderAPI_MakeVertex(aPoints.front()).Vertex();
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} else if (aNbPnts > 1) {
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// There are several points. Make a polyline.
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std::list <gp_Pnt>::const_iterator anIter = aPoints.begin();
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TopoDS_Vertex aVtxFirst =
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BRepBuilderAPI_MakeVertex(*anIter).Vertex();
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TopoDS_Vertex aVtx[2];
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TopoDS_Edge aSegment;
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BRepBuilderAPI_MakeWire aMkWire;
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aVtx[0] = aVtxFirst;
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for (++anIter; anIter != aPoints.end(); ++anIter) {
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aVtx[1] = BRepBuilderAPI_MakeVertex(*anIter).Vertex();
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aSegment = BRepBuilderAPI_MakeEdge(aVtx[0], aVtx[1]).Edge();
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aMkWire.Add(aSegment);
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aVtx[0] = aVtx[1];
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}
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if (IsClosed) {
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// Create a closing segment.
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aSegment = BRepBuilderAPI_MakeEdge(aVtx[0], aVtxFirst).Edge();
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aMkWire.Add(aSegment);
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}
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aResult = aMkWire.Wire();
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}
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return aResult;
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}
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//=======================================================================
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// function : constructBSpline
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// purpose : See function 'constructBSpline' in file 'CurveCreator_Utils.cxx'.
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//=======================================================================
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static bool constructBSpline(
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const Handle(TColgp_HArray1OfPnt)& thePoints,
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const Standard_Boolean theIsClosed,
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Handle(Geom_BSplineCurve)& theBSpline)
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{
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const int aPointCount = thePoints->Length();
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if (aPointCount <= 1)
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{
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return false;
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}
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// Calculate the tangents.
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TColgp_Array1OfVec aTangents(1, aPointCount);
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Handle(TColStd_HArray1OfBoolean) aTangentFlags =
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new TColStd_HArray1OfBoolean(1, aPointCount);
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GeomAPI_Interpolate aInterpolator(thePoints, theIsClosed, 0);
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if (aPointCount == 2)
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{
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aTangentFlags->SetValue(1, Standard_False);
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aTangentFlags->SetValue(2, Standard_False);
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}
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else
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{
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for (Standard_Integer aPN = 1; aPN <= aPointCount; ++aPN)
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{
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gp_Vec aTangent;
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if (aPN != 1 || theIsClosed)
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{
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const Standard_Integer aPN1 = (aPN != 1) ? (aPN - 1) : aPointCount;
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aTangent = gp_Vec(thePoints->Value(aPN1),
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thePoints->Value(aPN)).Normalized();
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}
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if (aPN < aPointCount || theIsClosed)
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{
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const Standard_Integer aPN2 = (aPN != aPointCount) ? (aPN + 1) : 1;
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const gp_Vec aTangent2 = aTangent +
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gp_Vec(thePoints->Value(aPN), thePoints->Value(aPN2)).Normalized();
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if (aTangent2.SquareMagnitude() >= Precision::SquareConfusion())
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{
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aTangent = aTangent2.Normalized();
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}
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else
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{
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aTangent = -aTangent;
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}
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}
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aTangents.SetValue(aPN, aTangent);
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aTangentFlags->SetValue(aPN, Standard_True);
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}
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}
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// Interpolate.
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aInterpolator.Load(aTangents, aTangentFlags, Standard_False);
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aInterpolator.Perform();
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const bool aResult = (aInterpolator.IsDone() == Standard_True);
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if (aResult)
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{
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theBSpline = aInterpolator.Curve();
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}
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return aResult;
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}
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//=======================================================================
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// function : MakeInterpolation
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// purpose :
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//=======================================================================
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TopoDS_Shape Sketcher_Utils::MakeInterpolation(
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const std::list<double>& theCoords2D,
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const Standard_Boolean theIsClosed,
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const gp_Ax3& thePlane)
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{
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if (theCoords2D.size() == 0)
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{
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return TopoDS_Shape();
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}
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// Get the different points.
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std::list<gp_Pnt> aTmpPoints;
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To3D(theCoords2D, thePlane, aTmpPoints);
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gp_Pnt aFirstPoint = aTmpPoints.front();
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gp_Pnt aPoint = aFirstPoint;
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std::list<gp_Pnt>::iterator aPIt = aTmpPoints.begin();
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for (++aPIt; aPIt != aTmpPoints.end();)
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{
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const gp_Pnt aPoint2 = *aPIt;
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if (!aPoint.IsEqual(aPoint2, POINT_CONFUSION_TOLERANCE))
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{
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aPoint = aPoint2;
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++aPIt;
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}
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else
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{
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aTmpPoints.erase(aPIt);
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}
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}
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if (theIsClosed)
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{
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while (--aPIt != aTmpPoints.begin() &&
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aFirstPoint.IsEqual(*aPIt, POINT_CONFUSION_TOLERANCE))
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{
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aTmpPoints.erase(aPIt);
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}
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}
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// Process the single point case.
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const int aPointCount = aTmpPoints.size();
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if (aPointCount == 1)
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{
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return BRepBuilderAPI_MakeVertex(aTmpPoints.front());
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}
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// Process the other cases.
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Handle(TColgp_HArray1OfPnt) aPoints =
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new TColgp_HArray1OfPnt(1, aPointCount);
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aPIt = aTmpPoints.begin();
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for (Standard_Integer aPN = 1; aPIt != aTmpPoints.end(); ++aPIt, ++aPN)
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{
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aPoints->SetValue(aPN, *aPIt);
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}
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Handle(Geom_BSplineCurve) aBSpline;
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if (constructBSpline(aPoints, theIsClosed, aBSpline))
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{
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return BRepBuilderAPI_MakeWire(BRepBuilderAPI_MakeEdge(aBSpline));
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}
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return TopoDS_Shape();
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}
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//=======================================================================
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// function : To3D
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// purpose :
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//=======================================================================
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void Sketcher_Utils::To3D(const std::list <double> &theCoords2D,
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const gp_Ax3 &thePlane,
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std::list <gp_Pnt> &thePoints)
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{
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thePoints.clear();
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if (theCoords2D.empty() || theCoords2D.size() % 2 == 1) {
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// Odd number of coordinates or empty list. Invalid case.
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return;
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}
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std::list <double>::const_iterator anIter = theCoords2D.begin();
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Standard_Real aX = *anIter;
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Standard_Real aY = *(++anIter);
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gp_Pnt aPLast = ElSLib::PlaneValue (aX, aY, thePlane);
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gp_Pnt aPnt;
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thePoints.push_back(aPLast);
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for (++anIter; anIter != theCoords2D.end(); ++anIter) {
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aX = *anIter;
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aY = *(++anIter);
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aPnt = ElSLib::PlaneValue (aX, aY, thePlane);
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if (!aPLast.IsEqual(aPnt, POINT_CONFUSION_TOLERANCE)) {
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thePoints.push_back(aPnt);
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aPLast = aPnt;
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}
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}
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}
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