mirror of
https://develop.openfoam.com/Development/openfoam.git
synced 2025-11-28 03:28:01 +00:00
ac4f580d09
Changes / Improvements
- more consistent subsetting, interface
* Extend the use of subset and non-subset collections with uniform
internal getters to ensure that the subset/non-subset versions
are robustly handled.
* operator[](label) and objectIndex(label) for standardized access
to the underlying item, or the original index, regardless of
subsetting or not.
* centres() and centre(label) for representative point cloud
information.
* nDim() returns the object dimensionality (0: point, 1: line, etc)
these can be used to determine how 'fat' each shape may be
and whether bounds(labelList) may contribute any useful information.
* bounds(labelList) to return the full bound box required for
specific items. Eg, the overall bounds for various 3D cells.
- easier construction of non-caching versions. The bounding boxes are
rarely cached, so simpler constructors without the caching bool
are provided.
- expose findNearest (bound sphere) method to allow general use
since this does not actually need a tree.
- static helpers
The boxes() static methods can be used by callers that need to build
their own treeBoundBoxList of common shapes (edge, face, cell)
that are also available as treeData types.
The bounds() static methods can be used by callers to determine the
overall bound-box size prior to constructing an indexedOctree
without writing ad hoc code inplace.
Not implemented for treeDataPrimitivePatch since similiar
functionality is available directly from the PrimitivePatch::box()
method with less typing.
========
BREAKING: cellLabels(), faceLabels(), edgeLabel() access methods
- it was always unsafe to use the treeData xxxLabels() methods without
subsetting elements. However, since the various classes
(treeDataCell, treeDataEdge, etc) automatically provided
an identity lookup, this problem was not apparent.
Use objectIndex(label) to safely de-reference to the original index
and operator[](index) to de-reference to the original object.
592 lines
16 KiB
C
592 lines
16 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2014-2017 OpenFOAM Foundation
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Copyright (C) 2020-2022 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Application
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surfaceHookUp
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Group
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grpSurfaceUtilities
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Description
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Find close open edges and stitches the surface along them
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Usage
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- surfaceHookUp hookDistance [OPTION]
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "Time.H"
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#include "triSurfaceMesh.H"
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#include "indexedOctree.H"
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#include "treeBoundBox.H"
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#include "bitSet.H"
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#include "unitConversion.H"
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#include "searchableSurfaces.H"
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#include "IOdictionary.H"
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using namespace Foam;
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// Split facei along edgeI at position newPointi
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void greenRefine
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(
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const triSurface& surf,
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const label facei,
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const label edgeI,
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const label newPointi,
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DynamicList<labelledTri>& newFaces
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)
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{
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const labelledTri& f = surf.localFaces()[facei];
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const edge& e = surf.edges()[edgeI];
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// Find index of edge in face.
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label fp0 = f.find(e[0]);
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label fp1 = f.fcIndex(fp0);
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label fp2 = f.fcIndex(fp1);
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if (f[fp1] == e[1])
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{
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// Edge oriented like face
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newFaces.append
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(
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labelledTri
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(
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f[fp0],
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newPointi,
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f[fp2],
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f.region()
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)
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);
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newFaces.append
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(
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labelledTri
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(
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newPointi,
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f[fp1],
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f[fp2],
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f.region()
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)
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);
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}
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else
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{
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newFaces.append
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(
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labelledTri
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(
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f[fp2],
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newPointi,
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f[fp1],
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f.region()
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)
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);
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newFaces.append
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(
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labelledTri
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(
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newPointi,
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f[fp0],
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f[fp1],
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f.region()
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)
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);
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}
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}
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//scalar checkEdgeAngle
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//(
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// const triSurface& surf,
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// const label edgeIndex,
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// const label pointIndex,
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// const scalar& angle
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//)
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//{
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// const edge& e = surf.edges()[edgeIndex];
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// const vector eVec = e.unitVec(surf.localPoints());
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// const labelList& pEdges = surf.pointEdges()[pointIndex];
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//
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// forAll(pEdges, eI)
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// {
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// const edge& nearE = surf.edges()[pEdges[eI]];
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// const vector nearEVec = nearE.unitVec(surf.localPoints());
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// const scalar dot = eVec & nearEVec;
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// const scalar minCos = degToRad(angle);
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// if (mag(dot) > minCos)
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// {
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// return false;
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// }
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// }
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// return true;
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//}
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void createBoundaryEdgeTrees
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(
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const PtrList<triSurfaceMesh>& surfs,
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PtrList<indexedOctree<treeDataEdge>>& bEdgeTrees,
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labelListList& treeBoundaryEdges
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)
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{
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forAll(surfs, surfI)
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{
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const triSurface& surf = surfs[surfI];
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// Boundary edges
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treeBoundaryEdges[surfI] =
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identity
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(
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surf.nEdges() - surf.nInternalEdges(),
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surf.nInternalEdges()
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);
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Random rndGen(17301893);
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// Slightly extended bb. Slightly off-centred just so on symmetric
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// geometry there are less face/edge aligned items.
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treeBoundBox bb
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(
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treeBoundBox(surf.localPoints()).extend(rndGen, 1e-4, ROOTVSMALL)
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);
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bEdgeTrees.set
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(
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surfI,
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new indexedOctree<treeDataEdge>
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(
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treeDataEdge
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(
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false, // cachebb
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surf.edges(), // edges
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surf.localPoints(), // points
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treeBoundaryEdges[surfI] // selected edges
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),
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bb, // bb
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8, // maxLevel
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10, // leafsize
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3.0 // duplicity
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)
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);
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}
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}
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class findNearestOpSubset
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{
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const indexedOctree<treeDataEdge>& tree_;
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DynamicList<label>& shapeMask_;
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public:
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findNearestOpSubset
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(
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const indexedOctree<treeDataEdge>& tree,
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DynamicList<label>& shapeMask
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)
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:
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tree_(tree),
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shapeMask_(shapeMask)
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{}
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void operator()
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(
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const labelUList& indices,
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const point& sample,
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scalar& nearestDistSqr,
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label& minIndex,
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point& nearestPoint
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) const
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{
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const treeDataEdge& shape = tree_.shapes();
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for (const label index : indices)
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{
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const label edgeIndex = shape.objectIndex(index);
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if (shapeMask_.found(edgeIndex))
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{
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continue;
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}
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pointHit nearHit = shape.line(index).nearestDist(sample);
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// Only register hit if closest point is not an edge point
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if (nearHit.hit())
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{
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const scalar distSqr = sqr(nearHit.distance());
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if (distSqr < nearestDistSqr)
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{
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nearestDistSqr = distSqr;
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minIndex = index;
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nearestPoint = nearHit.point();
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}
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}
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}
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}
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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argList::addNote
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(
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"Hook surfaces to other surfaces by moving and retriangulating their"
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" boundary edges to match other surface boundary edges"
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);
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argList::noParallel();
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argList::addArgument("hookTolerance", "The point merge tolerance");
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argList::addOption("dict", "file", "Alternative surfaceHookUpDict");
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#include "setRootCase.H"
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#include "createTime.H"
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const word dictName("surfaceHookUpDict");
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#include "setSystemRunTimeDictionaryIO.H"
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Info<< "Reading " << dictIO.name() << nl << endl;
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const IOdictionary dict(dictIO);
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const scalar dist(args.get<scalar>(1));
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const scalar matchTolerance(max(1e-6*dist, SMALL));
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const label maxIters = 100;
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Info<< "Hooking distance = " << dist << endl;
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searchableSurfaces surfs
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(
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IOobject
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(
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"surfacesToHook",
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runTime.constant(),
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"triSurface",
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runTime
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),
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dict,
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true // assume single-region names get surface name
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);
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Info<< nl << "Reading surfaces: " << endl;
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forAll(surfs, surfI)
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{
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Info<< incrIndent;
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Info<< nl << indent << "Surface = " << surfs.names()[surfI] << endl;
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const wordList& regions = surfs[surfI].regions();
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forAll(regions, surfRegionI)
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{
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Info<< incrIndent;
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Info<< indent << "Regions = " << regions[surfRegionI] << endl;
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Info<< decrIndent;
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}
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Info<< decrIndent;
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}
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PtrList<indexedOctree<treeDataEdge>> bEdgeTrees(surfs.size());
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labelListList treeBoundaryEdges(surfs.size());
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List<DynamicList<labelledTri>> newFaces(surfs.size());
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List<DynamicList<point>> newPoints(surfs.size());
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List<bitSet> visitedFace(surfs.size());
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PtrList<triSurfaceMesh> newSurfaces(surfs.size());
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forAll(surfs, surfI)
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{
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const triSurfaceMesh& surf =
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refCast<const triSurfaceMesh>(surfs[surfI]);
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newSurfaces.set
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(
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surfI,
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new triSurfaceMesh
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(
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IOobject
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(
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"hookedSurface_" + surfs.names()[surfI],
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runTime.constant(),
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"triSurface",
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runTime
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),
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surf
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)
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);
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}
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label nChanged = 0;
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label nIters = 1;
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do
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{
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Info<< nl << "Iteration = " << nIters++ << endl;
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nChanged = 0;
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createBoundaryEdgeTrees(newSurfaces, bEdgeTrees, treeBoundaryEdges);
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forAll(newSurfaces, surfI)
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{
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const triSurface& newSurf = newSurfaces[surfI];
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newFaces[surfI] = newSurf.localFaces();
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newPoints[surfI] = newSurf.localPoints();
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visitedFace[surfI] = bitSet(newSurf.size(), false);
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}
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forAll(newSurfaces, surfI)
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{
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const triSurface& surf = newSurfaces[surfI];
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List<pointIndexHit> bPointsTobEdges(surf.boundaryPoints().size());
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labelList bPointsHitTree(surf.boundaryPoints().size(), -1);
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const labelListList& pointEdges = surf.pointEdges();
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forAll(bPointsTobEdges, bPointi)
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{
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pointIndexHit& nearestHit = bPointsTobEdges[bPointi];
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const label pointi = surf.boundaryPoints()[bPointi];
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const point& samplePt = surf.localPoints()[pointi];
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const labelList& pEdges = pointEdges[pointi];
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// Add edges connected to the edge to the shapeMask
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DynamicList<label> shapeMask;
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shapeMask.append(pEdges);
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forAll(bEdgeTrees, treeI)
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{
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const indexedOctree<treeDataEdge>& bEdgeTree =
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bEdgeTrees[treeI];
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pointIndexHit currentHit =
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bEdgeTree.findNearest
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(
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samplePt,
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sqr(dist),
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findNearestOpSubset
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(
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bEdgeTree,
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shapeMask
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)
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);
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if
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(
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currentHit.hit()
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&&
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(
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!nearestHit.hit()
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||
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(
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currentHit.point().distSqr(samplePt)
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< nearestHit.point().distSqr(samplePt)
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)
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)
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)
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{
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nearestHit = currentHit;
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bPointsHitTree[bPointi] = treeI;
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}
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}
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if (nearestHit.hit())
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{
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// bool rejectEdge =
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// checkEdgeAngle
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// (
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// surf,
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// nearestHit.index(),
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// pointi,
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// 30
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// );
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scalar distSqr = nearestHit.point().distSqr(samplePt);
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if (distSqr > Foam::sqr(dist))
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{
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nearestHit.setMiss();
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}
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}
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}
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forAll(bPointsTobEdges, bPointi)
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{
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const pointIndexHit& eHit = bPointsTobEdges[bPointi];
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if (eHit.hit())
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{
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const label hitSurfI = bPointsHitTree[bPointi];
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const triSurface& hitSurf = newSurfaces[hitSurfI];
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const label eIndex =
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treeBoundaryEdges[hitSurfI][eHit.index()];
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const edge& e = hitSurf.edges()[eIndex];
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const label pointi = surf.boundaryPoints()[bPointi];
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const labelList& eFaces = hitSurf.edgeFaces()[eIndex];
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if (eFaces.size() != 1)
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{
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WarningInFunction
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<< "Edge is attached to " << eFaces.size()
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<< " faces." << endl;
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continue;
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}
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const label facei = eFaces[0];
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if (visitedFace[hitSurfI][facei])
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{
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continue;
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}
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DynamicList<labelledTri> newFacesFromSplit(2);
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const point& pt = surf.localPoints()[pointi];
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if
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(
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(
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pt.distSqr(hitSurf.localPoints()[e.start()])
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< matchTolerance
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)
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|| (
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pt.distSqr(hitSurf.localPoints()[e.end()])
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< matchTolerance
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)
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)
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{
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continue;
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}
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nChanged++;
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label newPointi = -1;
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// Keep the points in the same place and move the edge
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if (hitSurfI == surfI)
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{
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newPointi = pointi;
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}
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else
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{
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newPoints[hitSurfI].append(newPoints[surfI][pointi]);
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newPointi = newPoints[hitSurfI].size() - 1;
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}
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// Split the other face.
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greenRefine
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(
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hitSurf,
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facei,
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eIndex,
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newPointi,
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newFacesFromSplit
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);
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visitedFace[hitSurfI].set(facei);
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forAll(newFacesFromSplit, newFacei)
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{
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const labelledTri& fN = newFacesFromSplit[newFacei];
|
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|
|
if (newFacei == 0)
|
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{
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newFaces[hitSurfI][facei] = fN;
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}
|
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else
|
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{
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newFaces[hitSurfI].append(fN);
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}
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}
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}
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}
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}
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Info<< " Number of edges split = " << nChanged << endl;
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forAll(newSurfaces, surfI)
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{
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newSurfaces.set
|
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(
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surfI,
|
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new triSurfaceMesh
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(
|
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IOobject
|
|
(
|
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"hookedSurface_" + surfs.names()[surfI],
|
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runTime.constant(),
|
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"triSurface",
|
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runTime
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|
),
|
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triSurface
|
|
(
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newFaces[surfI],
|
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newSurfaces[surfI].patches(),
|
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pointField(newPoints[surfI])
|
|
)
|
|
)
|
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);
|
|
}
|
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|
|
} while (nChanged > 0 && nIters <= maxIters);
|
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|
|
Info<< endl;
|
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|
|
forAll(newSurfaces, surfI)
|
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{
|
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const triSurfaceMesh& newSurf = newSurfaces[surfI];
|
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|
|
Info<< "Writing hooked surface " << newSurf.searchableSurface::name()
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<< endl;
|
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|
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newSurf.searchableSurface::write();
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}
|
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|
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Info<< "\nEnd\n" << endl;
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return 0;
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}
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|
|
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// ************************************************************************* //
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