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RungeKutta4Solver

A popular explicit time integrator.

Target: Sofa.Component.ODESolver.Forward

namespace: sofa::component::odesolver::forward

parents:

  • OdeSolver

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
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

Examples

RungeKutta4Solver.scn

<?xml version="1.0" ?>
<Node name="root" gravity="-1.8 0 100" dt="0.0005">
    <RequiredPlugin name="Sofa.Component.Constraint.Projective"/> <!-- Needed to use components [FixedProjectiveConstraint] -->
    <RequiredPlugin name="Sofa.Component.IO.Mesh"/> <!-- Needed to use components [MeshGmshLoader MeshOBJLoader] -->
    <RequiredPlugin name="Sofa.Component.LinearSolver.Iterative"/> <!-- Needed to use components [CGLinearSolver] -->
    <RequiredPlugin name="Sofa.Component.Mapping.Linear"/> <!-- Needed to use components [BarycentricMapping] -->
    <RequiredPlugin name="Sofa.Component.Mass"/> <!-- Needed to use components [UniformMass] -->
    <RequiredPlugin name="Sofa.Component.ODESolver.Forward"/> <!-- Needed to use components [RungeKutta4Solver] -->
    <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.Constant"/> <!-- Needed to use components [MeshTopology] -->
    <RequiredPlugin name="Sofa.GL.Component.Rendering3D"/> <!-- Needed to use components [OglModel] -->
    <DefaultAnimationLoop/>

    <Node name="DeformableObject">
        <RungeKutta4Solver name="odeExplicitSolver" />
        <SparseLDLSolver template="CompressedRowSparseMatrixMat3x3d"/>
        <MeshGmshLoader name="loader" filename="mesh/truthcylinder1.msh" />
        <MeshTopology src="@loader" />
        <MechanicalObject src="@loader" />
        <UniformMass totalMass="15" />
        <FixedProjectiveConstraint indices="0 1 2 3 4 5 6 7 8 9 10 &#x0A;&#x09;&#x09;&#x09;&#x09;&#x09;&#x09;&#x09;11 12 13 14 15 16 17 18 19 20 &#x0A;&#x09;&#x09;&#x09;&#x09;&#x09;&#x09;&#x09;21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 &#x0A;&#x09;&#x09;&#x09;&#x09;&#x09;&#x09;&#x09;41 42 43 44 45 46 47 268 269 270 271 343 345" />
        <TetrahedronFEMForceField name="FEM" youngModulus="5000" poissonRatio="0.45" method="large" />
        <Node>
            <MeshOBJLoader name="meshLoader_0" filename="mesh/truthcylinder1.obj" handleSeams="1" />
            <OglModel name="m_Visual" src="@meshLoader_0" color="red" />
            <BarycentricMapping input="@.." output="@m_Visual" />
        </Node>
    </Node>
</Node>

def createScene(root_node):

   root = root_node.addChild('root', gravity="-1.8 0 100", dt="0.0005")

   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.Forward")
   root.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.FEM.Elastic")
   root.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
   root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Constant")
   root.addObject('RequiredPlugin', name="Sofa.GL.Component.Rendering3D")
   root.addObject('DefaultAnimationLoop', )

   deformable_object = root.addChild('DeformableObject')

   deformable_object.addObject('RungeKutta4Solver', name="odeExplicitSolver")
   deformable_object.addObject('SparseLDLSolver', template="CompressedRowSparseMatrixMat3x3d")
   deformable_object.addObject('MeshGmshLoader', name="loader", filename="mesh/truthcylinder1.msh")
   deformable_object.addObject('MeshTopology', src="@loader")
   deformable_object.addObject('MechanicalObject', src="@loader")
   deformable_object.addObject('UniformMass', totalMass="15")
   deformable_object.addObject('FixedProjectiveConstraint', indices="0 1 2 3 4 5 6 7 8 9 10 
                        11 12 13 14 15 16 17 18 19 20 
                        21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 
                        41 42 43 44 45 46 47 268 269 270 271 343 345")
   deformable_object.addObject('TetrahedronFEMForceField', name="FEM", youngModulus="5000", poissonRatio="0.45", method="large")

   node = DeformableObject.addChild('node')

   node.addObject('MeshOBJLoader', name="meshLoader_0", filename="mesh/truthcylinder1.obj", handleSeams="1")
   node.addObject('OglModel', name="m_Visual", src="@meshLoader_0", color="red")
   node.addObject('BarycentricMapping', input="@..", output="@m_Visual")