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Volum for Tet10 FemMesh

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This commit is contained in:
jriegel 2013-12-09 23:48:49 +01:00
parent 401cb13035
commit 132b75e5ab
4 changed files with 123 additions and 6 deletions
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102
src/Mod/Fem/App/FemMesh.cpp
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@ -891,3 +891,105 @@ struct Fem::FemMesh::FemMeshInfo FemMesh::getInfo(void) const{
return rtrn;
}
// for(unsigned int i=0;i<all_elements.size();i++)
// {
// //Die Reihenfolge wie hier die Elemente hinzugefügt werden ist sehr wichtig.
// //Ansonsten ist eine konsistente Datenstruktur nicht möglich
// meshds->AddVolumeWithID(
// meshds->FindNode(all_elements[i][0]),
// meshds->FindNode(all_elements[i][2]),
// meshds->FindNode(all_elements[i][1]),
// meshds->FindNode(all_elements[i][3]),
// meshds->FindNode(all_elements[i][6]),
// meshds->FindNode(all_elements[i][5]),
// meshds->FindNode(all_elements[i][4]),
// meshds->FindNode(all_elements[i][9]),
// meshds->FindNode(all_elements[i][7]),
// meshds->FindNode(all_elements[i][8]),
// element_id[i]
// );
// }
Base::Quantity FemMesh::getVolume(void)const
{
SMDS_VolumeIteratorPtr aVolIter = myMesh->GetMeshDS()->volumesIterator();
//Calculate Mesh Volume
//For an accurate Volume Calculation of a quadratic Tetrahedron
//we have to calculate the Volume of 8 Sub-Tetrahedrons
Base::Vector3d a,b,c,a_b_product;
double volume = 0.0;
for (;aVolIter->more();)
{
const SMDS_MeshVolume* aVol = aVolIter->next();
if ( aVol->NbNodes() != 10 ) continue;
Base::Vector3d v1(aVol->GetNode(1)->X(),aVol->GetNode(1)->Y(),aVol->GetNode(1)->Z());
Base::Vector3d v0(aVol->GetNode(0)->X(),aVol->GetNode(0)->Y(),aVol->GetNode(0)->Z());
Base::Vector3d v2(aVol->GetNode(2)->X(),aVol->GetNode(2)->Y(),aVol->GetNode(2)->Z());
Base::Vector3d v3(aVol->GetNode(3)->X(),aVol->GetNode(3)->Y(),aVol->GetNode(3)->Z());
Base::Vector3d v4(aVol->GetNode(4)->X(),aVol->GetNode(4)->Y(),aVol->GetNode(4)->Z());
Base::Vector3d v6(aVol->GetNode(6)->X(),aVol->GetNode(6)->Y(),aVol->GetNode(6)->Z());
Base::Vector3d v5(aVol->GetNode(5)->X(),aVol->GetNode(5)->Y(),aVol->GetNode(5)->Z());
Base::Vector3d v8(aVol->GetNode(8)->X(),aVol->GetNode(8)->Y(),aVol->GetNode(8)->Z());
Base::Vector3d v7(aVol->GetNode(7)->X(),aVol->GetNode(7)->Y(),aVol->GetNode(7)->Z());
Base::Vector3d v9(aVol->GetNode(9)->X(),aVol->GetNode(9)->Y(),aVol->GetNode(9)->Z());
//1,5,8,7
a = v4 -v0 ;
b = v7 -v0 ;
c = v6 -v0 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//5,9,8,7
a = v8 -v4 ;
b = v7 -v4 ;
c = v6 -v4 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//5,2,9,7
a = v1 -v4 ;
b = v8 -v4 ;
c = v6 -v4 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//2,6,9,7
a = v5 -v1 ;
b = v8 -v1 ;
c = v6 -v1 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//9,6,10,7
a = v5 -v8 ;
b = v9 -v8 ;
c = v6 -v8 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//6,3,10,7
a = v2 -v5 ;
b = v9 -v5 ;
c = v6 -v5 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//8,9,10,7
a = v8 -v7 ;
b = v9 -v7 ;
c = v6 -v7 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
//8,9,10,4
a = v8 -v7 ;
b = v9 -v7 ;
c = v3 -v7 ;
a_b_product.x = a.y*b.z-b.y*a.z;a_b_product.y = a.z*b.x-b.z*a.x;a_b_product.z = a.x*b.y-b.x*a.y;
volume += 1.0/6.0 * fabs((a_b_product.x * c.x)+ (a_b_product.y * c.y)+(a_b_product.z * c.z));
}
return Base::Quantity(volume,Unit::Volume);
}

3
src/Mod/Fem/App/FemMesh.h
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@ -26,6 +26,7 @@
#include <App/ComplexGeoData.h>
#include <Base/Placement.h>
#include <Base/Quantity.h>
#include <vector>
#include <list>
@ -96,6 +97,8 @@ public:
Base::Matrix4D getTransform(void) const;
/// Bound box from the shape
Base::BoundBox3d getBoundBox(void)const;
/// get the volume (when there are volume elements)
Base::Quantity getVolume(void)const;
//@}
/** @name Modification */

18
src/Mod/Fem/App/FemMeshPy.xml
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@ -179,11 +179,17 @@
</Documentation>
<Parameter Name="SubMeshCount" Type="Int"/>
</Attribute>
<Attribute Name="GroupCount" ReadOnly="true">
<Documentation>
<UserDocu>Number of Groups in the Mesh.</UserDocu>
</Documentation>
<Parameter Name="GroupCount" Type="Int"/>
</Attribute>
<Attribute Name="GroupCount" ReadOnly="true">
<Documentation>
<UserDocu>Number of Groups in the Mesh.</UserDocu>
</Documentation>
<Parameter Name="GroupCount" Type="Int"/>
</Attribute>
<Attribute Name="Volume" ReadOnly="true">
<Documentation>
<UserDocu>Volume of the mesh.</UserDocu>
</Documentation>
<Parameter Name="Volume" Type="Object"/>
</Attribute>
</PythonExport>
</GenerateModel>

6
src/Mod/Fem/App/FemMeshPyImp.cpp
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@ -34,6 +34,7 @@
#include <Base/VectorPy.h>
#include <Base/MatrixPy.h>
#include <Base/PlacementPy.h>
#include <Base/QuantityPy.h>
#include <Mod/Part/App/TopoShapePy.h>
#include <Mod/Part/App/TopoShapeFacePy.h>
@ -603,6 +604,11 @@ Py::Int FemMeshPy::getGroupCount(void) const
return Py::Int(getFemMeshPtr()->getSMesh()->NbGroup());
}
Py::Object FemMeshPy::getVolume(void) const
{
return Py::Object(new Base::QuantityPy(new Base::Quantity(getFemMeshPtr()->getVolume())));
}
// ===== custom attributes ============================================================
PyObject *FemMeshPy::getCustomAttributes(const char* /*attr*/) const