Calculates the inertia tensor and principal axes and moments of a polyhedra/cells/triSurfaces. Inertia can either be of the solid body or of a thin shell. More...
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static void | massPropertiesSolid (const pointField &pts, const triFaceList &triFaces, scalar density, scalar &mass, vector &cM, tensor &J) |
static void | massPropertiesShell (const pointField &pts, const triFaceList &triFaces, scalar density, scalar &mass, vector &cM, tensor &J, bool doReduce=false) |
static void | massPropertiesSolid (const triSurface &surf, scalar density, scalar &mass, vector &cM, tensor &J) |
static void | massPropertiesShell (const triSurface &surf, scalar density, scalar &mass, vector &cM, tensor &J, bool doReduce=false) |
static void | massPropertiesPatch (const polyPatch &pp, scalar density, scalar &mass, vector &cM, tensor &J, bool doReduce=false) |
static tensor | applyParallelAxisTheorem (scalar mass, const vector &cM, const tensor &J, const vector &refPt) |
static tmp< tensorField > | meshInertia (const polyMesh &mesh) |
static tensor | meshInertia (const polyMesh &mesh, label celli) |
Calculates the inertia tensor and principal axes and moments of a polyhedra/cells/triSurfaces. Inertia can either be of the solid body or of a thin shell.
References:
"Fast and Accurate Computation of Polyhedral Mass Properties", Brian Mirtich, Journal of Graphics Tools, Volume 1, Number 2, 1996.
https://people.eecs.berkeley.edu/~jfc/mirtich/massProps.html https://people.eecs.berkeley.edu/~jfc/mirtich/papers/volInt.ps.gz https://people.eecs.berkeley.edu/~jfc/mirtich/code/volumeIntegration.tar
Definition at line 65 of file momentOfInertia.H.
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Definition at line 34 of file momentOfInertia.C.
References forAll, Foam::I, n, Vector< Cmpt >::x(), Tensor< Cmpt >::xx(), Tensor< Cmpt >::xy(), Tensor< Cmpt >::xz(), Vector< Cmpt >::y(), Tensor< Cmpt >::yx(), Tensor< Cmpt >::yy(), Tensor< Cmpt >::yz(), Vector< Cmpt >::z(), Foam::Zero, Tensor< Cmpt >::zx(), Tensor< Cmpt >::zy(), and Tensor< Cmpt >::zz().
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Definition at line 191 of file momentOfInertia.C.
References triangle< Point, PointRef >::centre(), forAll, triangle< Point, PointRef >::mag(), Foam::reduce(), and Foam::Zero.
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Definition at line 259 of file momentOfInertia.C.
References forAll, PrimitivePatch< FaceList, PointField >::points(), and UList< T >::size().
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Definition at line 279 of file momentOfInertia.C.
References forAll, PrimitivePatch< FaceList, PointField >::points(), and UList< T >::size().
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Definition at line 300 of file momentOfInertia.C.
References DynamicList< T, SizeMin >::append(), f(), forAll, PrimitivePatch< FaceList, PointField >::points(), UList< T >::size(), and List< T >::transfer().
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Definition at line 334 of file momentOfInertia.C.
References Foam::I.
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Definition at line 352 of file momentOfInertia.C.
References forAll, mesh, primitiveMesh::nCells(), and tmp< T >::ref().
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Definition at line 370 of file momentOfInertia.C.
References polyMeshTetDecomposition::cellTetIndices(), forAll, mesh, polyMesh::points(), UList< T >::size(), and Foam::Zero.