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Modeling - New BRrep Graph representation (#1166)
Implement new representation of topology and BRep into OCCT. New foundation represent 2 levels: BRepGraph - public interfaces which making the topology graph representation BRepGraphInc - internal structure which represent topology as an incident tables. The foundation provides basic logic for conversion from TopoDS_Shape to BRepGraph and back. The foundation provides the iteration and exploring interfaces to travel in both directions on any level of topology. The internal id type of inc tables is 'int', which is not for long term and can be updated, better to use typed id aliases, even for the iterations, they provide all necessary operators. The access to the BRepGraph is done using multiple View classes available by methods from main class. The extensions on graphs is possible with 'Layer' and 'Cache', where first is persistent, second - temporary, Some basic operations on graph also provided for compact, analyze and copy.
This commit is contained in:
Pasukhin Dmitry
305
src/ModelingData/TKBRep/BRepGraph/BRepGraph_RefsView.cxx
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305
src/ModelingData/TKBRep/BRepGraph/BRepGraph_RefsView.cxx
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// Copyright (c) 2026 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <BRepGraph_RefsView.hxx>
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#include <BRepGraph_Data.hxx>
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#include <BRepGraph_RefsIterator.hxx>
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#include <NCollection_PackedMap.hxx>
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#include <shared_mutex>
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namespace
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{
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constexpr int THE_REFSVIEW_EDGE_VERTEX_REF_BLOCK_SIZE = 4;
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} // namespace
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//=================================================================================================
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int BRepGraph::RefsView::ShellOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbShellRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::ShellOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveShellRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::FaceOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbFaceRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::FaceOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveFaceRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::WireOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbWireRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::WireOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveWireRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::CoEdgeOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbCoEdgeRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::CoEdgeOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveCoEdgeRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::VertexOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbVertexRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::VertexOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveVertexRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::SolidOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbSolidRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::SolidOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveSolidRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::ChildOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbChildRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::ChildOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveChildRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::OccurrenceOps::Nb() const
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{
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return myGraph->myData->myIncStorage.NbOccurrenceRefs();
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}
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//=================================================================================================
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int BRepGraph::RefsView::OccurrenceOps::NbActive() const
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{
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return myGraph->myData->myIncStorage.NbActiveOccurrenceRefs();
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}
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//=================================================================================================
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const BRepGraphInc::ShellRef& BRepGraph::RefsView::ShellOps::Entry(
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const BRepGraph_ShellRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.ShellRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::FaceRef& BRepGraph::RefsView::FaceOps::Entry(
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const BRepGraph_FaceRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.FaceRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::WireRef& BRepGraph::RefsView::WireOps::Entry(
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const BRepGraph_WireRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.WireRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::CoEdgeRef& BRepGraph::RefsView::CoEdgeOps::Entry(
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const BRepGraph_CoEdgeRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.CoEdgeRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::VertexRef& BRepGraph::RefsView::VertexOps::Entry(
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const BRepGraph_VertexRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.VertexRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::SolidRef& BRepGraph::RefsView::SolidOps::Entry(
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const BRepGraph_SolidRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.SolidRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::ChildRef& BRepGraph::RefsView::ChildOps::Entry(
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const BRepGraph_ChildRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.ChildRef(theRefId);
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}
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//=================================================================================================
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const BRepGraphInc::OccurrenceRef& BRepGraph::RefsView::OccurrenceOps::Entry(
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const BRepGraph_OccurrenceRefId theRefId) const
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{
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return myGraph->myData->myIncStorage.OccurrenceRef(theRefId);
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_FaceRefId>& BRepGraph::RefsView::FaceOps::IdsOf(
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const BRepGraph_ShellId theShell) const
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{
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static const NCollection_Vector<BRepGraph_FaceRefId> anEmpty;
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if (!theShell.IsValid(myGraph->myData->myIncStorage.NbShells()))
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return anEmpty;
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return myGraph->myData->myIncStorage.Shell(theShell).FaceRefIds;
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_WireRefId>& BRepGraph::RefsView::WireOps::IdsOf(
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const BRepGraph_FaceId theFace) const
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{
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static const NCollection_Vector<BRepGraph_WireRefId> anEmpty;
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if (!theFace.IsValid(myGraph->myData->myIncStorage.NbFaces()))
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return anEmpty;
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return myGraph->myData->myIncStorage.Face(theFace).WireRefIds;
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_CoEdgeRefId>& BRepGraph::RefsView::CoEdgeOps::IdsOf(
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const BRepGraph_WireId theWire) const
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{
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static const NCollection_Vector<BRepGraph_CoEdgeRefId> anEmpty;
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if (!theWire.IsValid(myGraph->myData->myIncStorage.NbWires()))
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return anEmpty;
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return myGraph->myData->myIncStorage.Wire(theWire).CoEdgeRefIds;
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_ShellRefId>& BRepGraph::RefsView::ShellOps::IdsOf(
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const BRepGraph_SolidId theSolid) const
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{
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static const NCollection_Vector<BRepGraph_ShellRefId> anEmpty;
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if (!theSolid.IsValid(myGraph->myData->myIncStorage.NbSolids()))
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return anEmpty;
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return myGraph->myData->myIncStorage.Solid(theSolid).ShellRefIds;
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_ChildRefId>& BRepGraph::RefsView::ChildOps::IdsOf(
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const BRepGraph_CompoundId theCompound) const
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{
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static const NCollection_Vector<BRepGraph_ChildRefId> anEmpty;
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if (!theCompound.IsValid(myGraph->myData->myIncStorage.NbCompounds()))
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return anEmpty;
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return myGraph->myData->myIncStorage.Compound(theCompound).ChildRefIds;
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_OccurrenceRefId>& BRepGraph::RefsView::OccurrenceOps::IdsOf(
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const BRepGraph_ProductId theProduct) const
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{
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static const NCollection_Vector<BRepGraph_OccurrenceRefId> anEmpty;
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if (!theProduct.IsValid(myGraph->myData->myIncStorage.NbProducts()))
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return anEmpty;
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return myGraph->myData->myIncStorage.Product(theProduct).OccurrenceRefIds;
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}
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//=================================================================================================
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const NCollection_Vector<BRepGraph_SolidRefId>& BRepGraph::RefsView::SolidOps::IdsOf(
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const BRepGraph_CompSolidId theCompSolid) const
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{
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static const NCollection_Vector<BRepGraph_SolidRefId> anEmpty;
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if (!theCompSolid.IsValid(myGraph->myData->myIncStorage.NbCompSolids()))
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return anEmpty;
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return myGraph->myData->myIncStorage.CompSolid(theCompSolid).SolidRefIds;
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}
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//=================================================================================================
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NCollection_Vector<BRepGraph_VertexRefId> BRepGraph::RefsView::VertexOps::IdsOf(
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const BRepGraph_EdgeId theEdge,
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const occ::handle<NCollection_BaseAllocator>& theAllocator) const
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{
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NCollection_Vector<BRepGraph_VertexRefId> aResult(THE_REFSVIEW_EDGE_VERTEX_REF_BLOCK_SIZE,
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theAllocator);
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const BRepGraphInc_Storage& aStorage = myGraph->myData->myIncStorage;
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if (!theEdge.IsValid(aStorage.NbEdges()))
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return aResult;
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NCollection_PackedMap<int> aSeenRefIds;
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for (BRepGraph_RefsVertexOfEdge aRefIt(*myGraph, theEdge); aRefIt.More(); aRefIt.Next())
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{
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const BRepGraph_VertexRefId aRefId = aRefIt.CurrentId();
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if (aSeenRefIds.Add(aRefId.Index))
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{
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aResult.Append(aRefId);
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}
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}
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return aResult;
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}
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//=================================================================================================
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