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[Topology.Mapping] Refactor Hexa2TetraTopologicalMapping to support MeshTopology output #5947

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[Topology.Mapping] Refactor Hexa2TetraTopologicalMapping to support MeshTopology output #5947

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fc49751
deactivate checks so that the component can be used with a MeshTopolo…
alxbilger Feb 9, 2026
740e032
the componente never use the topology modifer. It can be removed
alxbilger Feb 9, 2026
e46a0f1
the output model does not need to be a TetrahedronSetTopologyContaine…
alxbilger Feb 9, 2026
8b00dcf
check pointer
alxbilger Feb 9, 2026
5846a1d
don't check topology input types because it can be an empty MeshTopology
alxbilger Feb 9, 2026
edf21ca
Replace TetrahedronSetTopology components with MeshTopology in scene …
alxbilger Feb 9, 2026
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47 changes: 15 additions & 32 deletions ...ent/Topology/Mapping/src/sofa/component/topology/mapping/Hexa2TetraTopologicalMapping.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -68,34 +68,17 @@ void Hexa2TetraTopologicalMapping::init()

Inherit1::init();

if (!this->checkTopologyInputTypes()) // method will display error message if false
if (toModel == nullptr)
{
this->d_componentState.setValue(sofa::core::objectmodel::ComponentState::Invalid);
return;
}

TetrahedronSetTopologyModifier* to_tstm { nullptr };
toModel->getContext()->get(to_tstm);
if (!to_tstm)
{
msg_error() << "No TetrahedronSetTopologyModifier found in the Tetrahedron topology Node.";
msg_error() << "No target topology container found.";
this->d_componentState.setValue(sofa::core::objectmodel::ComponentState::Invalid);
return;
}

// INITIALISATION of TETRAHEDRAL mesh from HEXAHEDRAL mesh :

TetrahedronSetTopologyContainer *to_tstc { nullptr };
toModel->getContext()->get(to_tstc);
if (!to_tstc)
{
msg_error() << "No TetrahedronSetTopologyContainer found in the Tetrahedron topology Node.";
this->d_componentState.setValue(sofa::core::objectmodel::ComponentState::Invalid);
return;
}

// Clear output topology
to_tstc->clear();
toModel->clear();

// Set the same number of points
toModel->setNbPoints(fromModel->getNbPoints());
Expand Down Expand Up @@ -165,21 +148,21 @@ void Hexa2TetraTopologicalMapping::init()

if(!swapped)
{
to_tstc->addTetra(c[0],c[5],c[1],c[6]);
to_tstc->addTetra(c[0],c[1],c[3],c[6]);
to_tstc->addTetra(c[1],c[3],c[6],c[2]);
to_tstc->addTetra(c[6],c[3],c[0],c[7]);
to_tstc->addTetra(c[6],c[7],c[0],c[5]);
to_tstc->addTetra(c[7],c[5],c[4],c[0]);
toModel->addTetra(c[0],c[5],c[1],c[6]);
toModel->addTetra(c[0],c[1],c[3],c[6]);
toModel->addTetra(c[1],c[3],c[6],c[2]);
toModel->addTetra(c[6],c[3],c[0],c[7]);
toModel->addTetra(c[6],c[7],c[0],c[5]);
toModel->addTetra(c[7],c[5],c[4],c[0]);
}
else
{
to_tstc->addTetra(c[0],c[5],c[6],c[1]);
to_tstc->addTetra(c[0],c[1],c[6],c[3]);
to_tstc->addTetra(c[1],c[3],c[2],c[6]);
to_tstc->addTetra(c[6],c[3],c[7],c[0]);
to_tstc->addTetra(c[6],c[7],c[5],c[0]);
to_tstc->addTetra(c[7],c[5],c[0],c[4]);
toModel->addTetra(c[0],c[5],c[6],c[1]);
toModel->addTetra(c[0],c[1],c[6],c[3]);
toModel->addTetra(c[1],c[3],c[2],c[6]);
toModel->addTetra(c[6],c[3],c[7],c[0]);
toModel->addTetra(c[6],c[7],c[5],c[0]);
toModel->addTetra(c[7],c[5],c[0],c[4]);
}
for (int j = 0; j < numberTetraInHexa; j++)
{
Expand Down
20 changes: 5 additions & 15 deletions examples/Component/SolidMechanics/FEM/TetrahedronHyperelasticityFEMForceField.scn
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Original file line number Diff line number Diff line change
Expand Up @@ -51,9 +51,7 @@
<MeshMatrixMass totalMass="1.0"/>

<Node name="tetras">
<TetrahedronSetTopologyContainer name="Container"/>
<TetrahedronSetTopologyModifier name="Modifier" />
<TetrahedronSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
<MeshTopology name="Container"/>
<Hexa2TetraTopologicalMapping name="default28" input="@../" output="@Container" printLog="0" />

<TetrahedronHyperelasticityFEMForceField name="FEM" ParameterSet="3448.2759 31034.483"/>
Expand All @@ -75,9 +73,7 @@
<MeshMatrixMass totalMass="1.0"/>

<Node name="tetras">
<TetrahedronSetTopologyContainer name="Container"/>
<TetrahedronSetTopologyModifier name="Modifier" />
<TetrahedronSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
<MeshTopology name="Container"/>
<Hexa2TetraTopologicalMapping name="default28" input="@../" output="@Container" printLog="0" />

<TetrahedronHyperelasticityFEMForceField name="FEM" ParameterSet="3448.2759 31034.483" materialName="StVenantKirchhoff"/>
Expand All @@ -100,9 +96,7 @@
<MeshMatrixMass totalMass="1.0"/>

<Node name="tetras">
<TetrahedronSetTopologyContainer name="Container"/>
<TetrahedronSetTopologyModifier name="Modifier" />
<TetrahedronSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
<MeshTopology name="Container"/>
<Hexa2TetraTopologicalMapping name="default28" input="@../" output="@Container" printLog="0" />

<TetrahedronHyperelasticityFEMForceField name="FEM" ParameterSet="3448.2759 31034.483" materialName="NeoHookean"/>
Expand All @@ -125,9 +119,7 @@
<MeshMatrixMass totalMass="1.0"/>

<Node name="tetras">
<TetrahedronSetTopologyContainer name="Container"/>
<TetrahedronSetTopologyModifier name="Modifier" />
<TetrahedronSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
<MeshTopology name="Container"/>
<Hexa2TetraTopologicalMapping name="default28" input="@../" output="@Container" printLog="0" />

<TetrahedronHyperelasticityFEMForceField name="FEM" ParameterSet="5000 7000 10" materialName="MooneyRivlin"/>
Expand All @@ -149,9 +141,7 @@
<MeshMatrixMass totalMass="1.0"/>

<Node name="tetras">
<TetrahedronSetTopologyContainer name="Container"/>
<TetrahedronSetTopologyModifier name="Modifier" />
<TetrahedronSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
<MeshTopology name="Container"/>
<Hexa2TetraTopologicalMapping name="default28" input="@../" output="@Container" printLog="0" />

<TetrahedronHyperelasticityFEMForceField name="FEM" ParameterSet="1500 500 5000" materialName="Ogden"/>
Expand Down
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