QuadularBendingSprings
Springs added to a quad mesh to prevent bending
Templates:
Vec3d
Target: Sofa.Component.SolidMechanics.Spring
namespace: sofa::component::solidmechanics::spring
parents:
ForceField
Data:
| Name | Description | Default value |
|---|---|---|
| name | object name | unnamed |
| printLog | if true, emits extra messages at runtime. | 0 |
| tags | list of the subsets the objet belongs to | |
| bbox | this object bounding box | |
| componentState | The state of the component among (Dirty, Valid, Undefined, Loading, Invalid). | Undefined |
| listening | if true, handle the events, otherwise ignore the events | 0 |
| isCompliance | Consider the component as a compliance, else as a stiffness | 0 |
| rayleighStiffness | Rayleigh damping - stiffness matrix coefficient | 0 |
| stiffness | uniform stiffness for the all springs | 100000 |
| damping | uniform damping for the all springs | 1 |
| edgeInfo | Internal edge data |
Links:
| Name | Description |
|---|---|
| context | Graph Node containing this object (or BaseContext::getDefault() if no graph is used) |
| slaves | Sub-objects used internally by this object |
| master | nullptr for regular objects, or master object for which this object is one sub-objects |
| mechanicalStates | List of mechanical states to which this component is associated |
| mstate | MechanicalState used by this component |
| topology | link to the topology container |
Examples
Component/SolidMechanics/Spring/QuadularBendingSprings.scn
<Node name="root" dt="0.005" showBoundingTree="0" gravity="0 -9.81 0">
<Node name="plugins">
<RequiredPlugin name="Sofa.Component.Constraint.Projective"/> <!-- Needed to use components [FixedProjectiveConstraint] -->
<RequiredPlugin name="Sofa.Component.Engine.Select"/> <!-- Needed to use components [BoxROI] -->
<RequiredPlugin name="Sofa.Component.LinearSolver.Direct"/> <!-- Needed to use components [EigenSimplicialLDLT] -->
<RequiredPlugin name="Sofa.Component.Mapping.Linear"/> <!-- Needed to use components [IdentityMapping] -->
<RequiredPlugin name="Sofa.Component.Mass"/> <!-- Needed to use components [DiagonalMass] -->
<RequiredPlugin name="Sofa.Component.ODESolver.Backward"/> <!-- Needed to use components [EulerImplicitSolver] -->
<RequiredPlugin name="Sofa.Component.SolidMechanics.FEM.Elastic"/> <!-- Needed to use components [TriangularFEMForceField] -->
<RequiredPlugin name="Sofa.Component.SolidMechanics.Spring"/> <!-- Needed to use components [QuadularBendingSprings] -->
<RequiredPlugin name="Sofa.Component.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
<RequiredPlugin name="Sofa.Component.Topology.Container.Dynamic"/> <!-- Needed to use components [QuadSetTopologyContainer TriangleSetTopologyContainer TriangleSetTopologyModifier] -->
<RequiredPlugin name="Sofa.Component.Topology.Container.Grid"/> <!-- Needed to use components [RegularGridTopology] -->
<RequiredPlugin name="Sofa.Component.Topology.Mapping"/> <!-- Needed to use components [Quad2TriangleTopologicalMapping] -->
<RequiredPlugin name="Sofa.Component.Visual"/> <!-- Needed to use components [VisualStyle] -->
<RequiredPlugin name="Sofa.GL.Component.Rendering3D"/> <!-- Needed to use components [OglModel] -->
</Node>
<DefaultAnimationLoop/>
<VisualStyle displayFlags="showBehaviorModels showWireframe" />
<Node name="QuadularSprings">
<EulerImplicitSolver name="cg_odesolver" printLog="false" rayleighStiffness="0.1" rayleighMass="0.1" />
<EigenSimplicialLDLT name="linearSolver" template="CompressedRowSparseMatrixMat3x3"/>
<RegularGridTopology min="0 0 0" max="1 0 1" nx="20" ny="1" nz="20" name="grid" />
<MechanicalObject name="Quads" />
<QuadSetTopologyContainer name="Container" quads="@grid.quads"/>
<QuadularBendingSprings name="FEM-Bend" stiffness="3000" damping="1.0" topology="@Container" draw="true"/>
<DiagonalMass massDensity="1.5" />
<BoxROI box="-0.0001 -0.0001 -0.0001 0.0001 0.0001 0.0001 0.999 -0.0001 -0.0001 1.0001 0.0001 0.0001" name="box"/>
<FixedProjectiveConstraint indices="@box.indices" />
<Node name="Surf">
<TriangleSetTopologyContainer name="Container"/>
<TriangleSetTopologyModifier name="Modifier" />
<Quad2TriangleTopologicalMapping input="@../Container" output="@Container" />
<TriangularFEMForceField name="FEM" youngModulus="1000" poissonRatio="0.3" method="large" />
</Node>
<Node name="Visu">
<OglModel name="Visual" color="yellow" />
<IdentityMapping input="@../Quads" output="@Visual" />
</Node>
</Node>
</Node>
def createScene(rootNode):
root = rootNode.addChild('root', dt="0.005", showBoundingTree="0", gravity="0 -9.81 0")
plugins = root.addChild('plugins')
plugins.addObject('RequiredPlugin', name="Sofa.Component.Constraint.Projective")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Engine.Select")
plugins.addObject('RequiredPlugin', name="Sofa.Component.LinearSolver.Direct")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Mapping.Linear")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Mass")
plugins.addObject('RequiredPlugin', name="Sofa.Component.ODESolver.Backward")
plugins.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.FEM.Elastic")
plugins.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.Spring")
plugins.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Dynamic")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Grid")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Topology.Mapping")
plugins.addObject('RequiredPlugin', name="Sofa.Component.Visual")
plugins.addObject('RequiredPlugin', name="Sofa.GL.Component.Rendering3D")
root.addObject('DefaultAnimationLoop')
root.addObject('VisualStyle', displayFlags="showBehaviorModels showWireframe")
QuadularSprings = root.addChild('QuadularSprings')
QuadularSprings.addObject('EulerImplicitSolver', name="cg_odesolver", printLog="false", rayleighStiffness="0.1", rayleighMass="0.1")
QuadularSprings.addObject('EigenSimplicialLDLT', name="linearSolver", template="CompressedRowSparseMatrixMat3x3")
QuadularSprings.addObject('RegularGridTopology', min="0 0 0", max="1 0 1", nx="20", ny="1", nz="20", name="grid")
QuadularSprings.addObject('MechanicalObject', name="Quads")
QuadularSprings.addObject('QuadSetTopologyContainer', name="Container", quads="@grid.quads")
QuadularSprings.addObject('QuadularBendingSprings', name="FEM-Bend", stiffness="3000", damping="1.0", topology="@Container", draw="true")
QuadularSprings.addObject('DiagonalMass', massDensity="1.5")
QuadularSprings.addObject('BoxROI', box="-0.0001 -0.0001 -0.0001 0.0001 0.0001 0.0001 0.999 -0.0001 -0.0001 1.0001 0.0001 0.0001", name="box")
QuadularSprings.addObject('FixedProjectiveConstraint', indices="@box.indices")
Surf = QuadularSprings.addChild('Surf')
Surf.addObject('TriangleSetTopologyContainer', name="Container")
Surf.addObject('TriangleSetTopologyModifier', name="Modifier")
Surf.addObject('Quad2TriangleTopologicalMapping', input="@../Container", output="@Container")
Surf.addObject('TriangularFEMForceField', name="FEM", youngModulus="1000", poissonRatio="0.3", method="large")
Visu = QuadularSprings.addChild('Visu')
Visu.addObject('OglModel', name="Visual", color="yellow")
Visu.addObject('IdentityMapping', input="@../Quads", output="@Visual")