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TrianglePressureForceField

Pressure applied on a triangular geometry.

Vec3d

Templates:

  • Vec3d

Target: Sofa.Component.MechanicalLoad

namespace: sofa::component::mechanicalload

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 object 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
rayleighStiffness Rayleigh damping - stiffness matrix coefficient 0
pressure Pressure force per unit area
cauchyStress Cauchy Stress applied on the normal of each triangle [ 0 0 0 , 0 0 0 , 0 0 0 ,]
triangleList Indices of triangles separated with commas where a pressure is applied
useConstantForce applied force is computed as the pressure vector times the area at rest 1
trianglePressureMap Map between triangle indices and their pressure
Visualization
showForces draw triangles which have a given pressure 0
Name Description Destination type name
context Graph Node containing this object (or BaseContext::getDefault() if no graph is used) BaseContext
slaves Sub-objects used internally by this object BaseObject
master nullptr for regular objects, or master object for which this object is one sub-objects BaseObject
mechanicalStates List of mechanical states to which this component is associated BaseMechanicalState
mstate MechanicalState used by this component MechanicalState<Vec3d>
topology link to the topology container BaseMeshTopology

Examples

TrianglePressureForceField.scn

<?xml version="1.0"?>
<!-- TrianglePressureForceField example scene -->
<Node name="root" dt="0.05" showBoundingTree="0" gravity="0 0 0">
    <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.Engine.Select"/> <!-- Needed to use components [BoxROI] -->
    <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.MechanicalLoad"/> <!-- Needed to use components [TrianglePressureForceField] -->
    <RequiredPlugin name="Sofa.Component.ODESolver.Backward"/> <!-- Needed to use components [EulerImplicitSolver] -->
    <RequiredPlugin name="Sofa.Component.SolidMechanics.FEM.Elastic"/> <!-- Needed to use components [TetrahedronFEMForceField] -->
    <RequiredPlugin name="Sofa.Component.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
    <RequiredPlugin name="Sofa.Component.Topology.Container.Dynamic"/> <!-- Needed to use components [TetrahedronSetGeometryAlgorithms TetrahedronSetTopologyContainer TetrahedronSetTopologyModifier TriangleSetGeometryAlgorithms TriangleSetTopologyContainer TriangleSetTopologyModifier] -->
    <RequiredPlugin name="Sofa.Component.Topology.Mapping"/> <!-- Needed to use components [Tetra2TriangleTopologicalMapping] -->
    <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="TT">
        <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/cylinder.msh" />
        <MechanicalObject src="@loader" name="Volume" />
        <include href="Objects/TetrahedronSetTopology.xml" src="@loader" />
        <DiagonalMass massDensity="0.5" />
        <FixedProjectiveConstraint indices="0-50" />
        <TetrahedronFEMForceField name="FEM" youngModulus="60" poissonRatio="0.3" computeGlobalMatrix="false" method="large" />
        <Node name="T">
            <include href="Objects/TriangleSetTopology.xml" src="@../Container"/>
            <Tetra2TriangleTopologicalMapping input="@../Container" output="@Container" />
            <BoxROI name="Roi" position="@../Volume.position" triangles="@Container.triangles" box="-0.5 -0.5 0.9   0.5 0.5 1.1"/>
            <TrianglePressureForceField name="PFF" triangleList="@Roi.triangleIndices" pressure="0 10 10" showForces="1"/>
            <TriangleCollisionModel />
            <Node name="Visu">
                <OglModel name="Visual" color="yellow" />
                <IdentityMapping input="@../../Volume" output="@Visual" />
            </Node>
        </Node>
    </Node>
</Node>

def createScene(root_node):

   root = root_node.addChild('root', dt="0.05", showBoundingTree="0", gravity="0 0 0")

   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.Engine.Select")
   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.MechanicalLoad")
   root.addObject('RequiredPlugin', name="Sofa.Component.ODESolver.Backward")
   root.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.FEM.Elastic")
   root.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
   root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Dynamic")
   root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Mapping")
   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', )

   tt = root.addChild('TT')

   tt.addObject('EulerImplicitSolver', name="cg_odesolver", printLog="false", rayleighStiffness="0.1", rayleighMass="0.1")
   tt.addObject('CGLinearSolver', iterations="25", name="linear solver", tolerance="1.0e-9", threshold="1.0e-9")
   tt.addObject('MeshGmshLoader', name="loader", filename="mesh/cylinder.msh")
   tt.addObject('MechanicalObject', src="@loader", name="Volume")
   tt.addObject('include', href="Objects/TetrahedronSetTopology.xml", src="@loader")
   tt.addObject('DiagonalMass', massDensity="0.5")
   tt.addObject('FixedProjectiveConstraint', indices="0-50")
   tt.addObject('TetrahedronFEMForceField', name="FEM", youngModulus="60", poissonRatio="0.3", computeGlobalMatrix="false", method="large")

   t = TT.addChild('T')

   t.addObject('include', href="Objects/TriangleSetTopology.xml", src="@../Container")
   t.addObject('Tetra2TriangleTopologicalMapping', input="@../Container", output="@Container")
   t.addObject('BoxROI', name="Roi", position="@../Volume.position", triangles="@Container.triangles", box="-0.5 -0.5 0.9   0.5 0.5 1.1")
   t.addObject('TrianglePressureForceField', name="PFF", triangleList="@Roi.triangleIndices", pressure="0 10 10", showForces="1")
   t.addObject('TriangleCollisionModel', )

   visu = T.addChild('Visu')

   visu.addObject('OglModel', name="Visual", color="yellow")
   visu.addObject('IdentityMapping', input="@../../Volume", output="@Visual")