TriangularBiquadraticSpringsForceField
Biquadratic Springs on a Triangular Mesh
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 |
| triangleInfo | Internal triangle data | |
| edgeInfo | Internal edge data | |
| initialPoints | Initial Position | |
| poissonRatio | Poisson ratio in Hooke's law | 0.3 |
| youngModulus | Young modulus in Hooke's law | 1000 |
| dampingRatio | Ratio damping/stiffness | 0 |
| useAngularSprings | If Angular Springs should be used or not | 1 |
| compressible | If additional energy penalizing compressibility should be used | 1 |
| matrixRegularization | Regularization of the Stiffnes Matrix (between 0 and 1) | 0.4 |
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/TriangularBiquadraticSpringsForceField.scn
<!-- TriangularBiquadraticSpringsForceField Basic Example -->
<Node name="root" dt="0.005" showBoundingTree="0" gravity="0 -9 1">
<RequiredPlugin name="Sofa.Component.Collision.Detection.Algorithm"/> <!-- Needed to use components [BVHNarrowPhase BruteForceBroadPhase CollisionPipeline] -->
<RequiredPlugin name="Sofa.Component.Collision.Detection.Intersection"/> <!-- Needed to use components [MinProximityIntersection] -->
<RequiredPlugin name="Sofa.Component.Collision.Geometry"/> <!-- Needed to use components [TriangleCollisionModel] -->
<RequiredPlugin name="Sofa.Component.Collision.Response.Contact"/> <!-- Needed to use components [CollisionResponse] -->
<RequiredPlugin name="Sofa.Component.Constraint.Projective"/> <!-- Needed to use components [FixedProjectiveConstraint] -->
<RequiredPlugin name="Sofa.Component.IO.Mesh"/> <!-- Needed to use components [MeshGmshLoader] -->
<RequiredPlugin name="Sofa.Component.LinearSolver.Iterative"/> <!-- Needed to use components [CGLinearSolver] -->
<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.Spring"/> <!-- Needed to use components [TriangularBiquadraticSpringsForceField] -->
<RequiredPlugin name="Sofa.Component.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
<RequiredPlugin name="Sofa.Component.Topology.Container.Dynamic"/> <!-- Needed to use components [TriangleSetGeometryAlgorithms TriangleSetTopologyContainer TriangleSetTopologyModifier] -->
<RequiredPlugin name="Sofa.Component.Visual"/> <!-- Needed to use components [VisualStyle] -->
<RequiredPlugin name="Sofa.GL.Component.Rendering3D"/> <!-- Needed to use components [OglModel] -->
<VisualStyle displayFlags="showBehaviorModels showVisual" />
<CollisionPipeline verbose="0" />
<BruteForceBroadPhase/>
<BVHNarrowPhase/>
<CollisionResponse response="PenalityContactForceField" />
<MinProximityIntersection name="Proximity" alarmDistance="0.8" contactDistance="0.5" />
<DefaultAnimationLoop/>
<Node name="SquareGravity">
<EulerImplicitSolver name="cg_odesolver" printLog="false" rayleighStiffness="0.1" rayleighMass="0.1" />
<CGLinearSolver iterations="25" name="linear solver" tolerance="1.0e-9" threshold="1.0e-9" />
<MeshGmshLoader name="loader" filename="mesh/square3.msh" createSubelements="1"/>
<MechanicalObject src="@loader" scale="10" />
<include href="Objects/TriangleSetTopology.xml" src="@loader" />
<DiagonalMass massDensity="0.015" />
<FixedProjectiveConstraint indices="0 1" />
<TriangularBiquadraticSpringsForceField name="BQS" youngModulus="15" poissonRatio="0.9" useAngularSprings="1" dampingRatio="0.00" />
<TriangleCollisionModel />
<Node >
<OglModel name="Visual" color="yellow" />
<IdentityMapping input="@.." output="@Visual" />
</Node>
</Node>
</Node>
def createScene(rootNode):
root = rootNode.addChild('root', dt="0.005", showBoundingTree="0", gravity="0 -9 1")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Detection.Algorithm")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Detection.Intersection")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Geometry")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Response.Contact")
root.addObject('RequiredPlugin', name="Sofa.Component.Constraint.Projective")
root.addObject('RequiredPlugin', name="Sofa.Component.IO.Mesh")
root.addObject('RequiredPlugin', name="Sofa.Component.LinearSolver.Iterative")
root.addObject('RequiredPlugin', name="Sofa.Component.Mapping.Linear")
root.addObject('RequiredPlugin', name="Sofa.Component.Mass")
root.addObject('RequiredPlugin', name="Sofa.Component.ODESolver.Backward")
root.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.Spring")
root.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Dynamic")
root.addObject('RequiredPlugin', name="Sofa.Component.Visual")
root.addObject('RequiredPlugin', name="Sofa.GL.Component.Rendering3D")
root.addObject('VisualStyle', displayFlags="showBehaviorModels showVisual")
root.addObject('CollisionPipeline', verbose="0")
root.addObject('BruteForceBroadPhase')
root.addObject('BVHNarrowPhase')
root.addObject('CollisionResponse', response="PenalityContactForceField")
root.addObject('MinProximityIntersection', name="Proximity", alarmDistance="0.8", contactDistance="0.5")
root.addObject('DefaultAnimationLoop')
SquareGravity = root.addChild('SquareGravity')
SquareGravity.addObject('EulerImplicitSolver', name="cg_odesolver", printLog="false", rayleighStiffness="0.1", rayleighMass="0.1")
SquareGravity.addObject('CGLinearSolver', iterations="25", name="linear solver", tolerance="1.0e-9", threshold="1.0e-9")
SquareGravity.addObject('MeshGmshLoader', name="loader", filename="mesh/square3.msh", createSubelements="1")
SquareGravity.addObject('MechanicalObject', src="@loader", scale="10")
SquareGravity.addObject('include', href="Objects/TriangleSetTopology.xml", src="@loader")
SquareGravity.addObject('DiagonalMass', massDensity="0.015")
SquareGravity.addObject('FixedProjectiveConstraint', indices="0 1")
SquareGravity.addObject('TriangularBiquadraticSpringsForceField', name="BQS", youngModulus="15", poissonRatio="0.9", useAngularSprings="1", dampingRatio="0.00")
SquareGravity.addObject('TriangleCollisionModel')
SquareGravity = SquareGravity.addChild('SquareGravity')
SquareGravity.addObject('OglModel', name="Visual", color="yellow")
SquareGravity.addObject('IdentityMapping', input="@..", output="@Visual")