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ParticlesRepulsionForceField

ForceField using SpatialGridContainer to compute repulsion forces in a set of spheres

Vec2d

Templates:

  • Vec2d

Target: SofaSphFluid

namespace: sofa::component::forcefield

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
rayleighStiffness Rayleigh damping - stiffness matrix coefficient 0
distance Distance to maintain between particles 1
stiffness Stiffness 100
damping Damping 0.1
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<Vec2d>

Vec3d

Templates:

  • Vec3d

Target: SofaSphFluid

namespace: sofa::component::forcefield

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
rayleighStiffness Rayleigh damping - stiffness matrix coefficient 0
distance Distance to maintain between particles 1
stiffness Stiffness 100
damping Damping 0.1
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>

Examples

ParticlesRepulsionForceField.scn

<?xml version="1.0" ?>
<Node name="root" gravity="0.0 -2.0 0.0" dt="0.04">
    <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 [NewProximityIntersection] -->
    <RequiredPlugin name="Sofa.Component.Collision.Geometry"/> <!-- Needed to use components [SphereCollisionModel] -->
    <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 [MeshOBJLoader] -->
    <RequiredPlugin name="Sofa.Component.LinearSolver.Iterative"/> <!-- Needed to use components [CGLinearSolver] -->
    <RequiredPlugin name="Sofa.Component.Mapping.Linear"/> <!-- Needed to use components [IdentityMapping SubsetMapping] -->
    <RequiredPlugin name="Sofa.Component.Mass"/> <!-- Needed to use components [UniformMass] -->
    <RequiredPlugin name="Sofa.Component.MechanicalLoad"/> <!-- Needed to use components [PlaneForceField SphereForceField] -->
    <RequiredPlugin name="Sofa.Component.ODESolver.Backward"/> <!-- Needed to use components [EulerImplicitSolver] -->
    <RequiredPlugin name="Sofa.Component.SolidMechanics.Spring"/> <!-- Needed to use components [MeshSpringForceField QuadBendingSprings] -->
    <RequiredPlugin name="Sofa.Component.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
    <RequiredPlugin name="Sofa.Component.Topology.Container.Grid"/> <!-- Needed to use components [RegularGridTopology] -->
    <RequiredPlugin name="Sofa.GL.Component.Rendering3D"/> <!-- Needed to use components [OglModel] -->
    <RequiredPlugin name="SofaSphFluid"/> <!-- Needed to use components [ParticlesRepulsionForceField SpatialGridContainer] -->

    <DefaultAnimationLoop/>
    <CollisionPipeline verbose="0" />
    <BruteForceBroadPhase/>
    <BVHNarrowPhase/>
    <CollisionResponse name="Response" />
    <NewProximityIntersection alarmDistance="0.002" contactDistance="0.001" />

    <Node name="Floor">
        <RegularGridTopology nx="2" ny="1" nz="2" xmin="20" xmax="-20" ymin="-3.05" ymax="-3.05" zmin="-20" zmax="20" />
        <MechanicalObject />
        <Node name="Visu">
            <OglModel name="Visual" color="red" />
            <IdentityMapping input="@.." output="@Visual" />
        </Node>
    </Node>

    <Node name="SquareCloth1">
        <EulerImplicitSolver rayleighMass="0.05"  rayleighStiffness="0.1" />
        <CGLinearSolver iterations="10" threshold="0.000001" tolerance="1e-5"/>
        <RegularGridTopology nx="100" ny="1" nz="100" xmin="12" xmax="-12" ymin="7" ymax="7" zmin="-12" zmax="12" />
        <MechanicalObject />
        <UniformMass totalMass="100" />
        <BoxConstraint box="-12 7 12 -10 7 12    10 7 12 12 7 12" />
        <MeshSpringForceField name="Springs" stiffness="1000" damping="0" />
        <QuadBendingSprings name="Bend" stiffness="2000" damping="1" />
        <SphereForceField stiffness="1000" damping="1" center="0 1 3" radius="4" />
        <PlaneForceField stiffness="1000" damping="20" normal="0 1 0" d="-3" />
        <SpatialGridContainer cellWidth="0.2" autoUpdate="false" showGrid="false" />
        <ParticlesRepulsionForceField distance="0.2" stiffness="1000" />

        <Node name="Visu">
            <OglModel name="Visual" color="green" />
            <IdentityMapping input="@.." output="@Visual" />
        </Node>

        <Node>
            <RegularGridTopology nx="4" ny="1" nz="4" xmin="12" xmax="-12" ymin="7" ymax="7" zmin="-12" zmax="12" />/
            <MechanicalObject />
            <SphereCollisionModel radius="1.0" contactStiffness="1" />
            <SubsetMapping />
        </Node>
    </Node>

    <Node name="Sphere">
        <MeshOBJLoader name="meshLoader_0" filename="mesh/sphere.obj" scale="3.95" handleSeams="1" />
        <OglModel name="Visual" src="@meshLoader_0" dx="0" dy="1" dz="3" color="blue" />
    </Node>
</Node>

def createScene(root_node):

   root = root_node.addChild('root', gravity="0.0 -2.0 0.0", dt="0.04")

   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.Spring")
   root.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
   root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Grid")
   root.addObject('RequiredPlugin', name="Sofa.GL.Component.Rendering3D")
   root.addObject('RequiredPlugin', name="SofaSphFluid")
   root.addObject('DefaultAnimationLoop', )
   root.addObject('CollisionPipeline', verbose="0")
   root.addObject('BruteForceBroadPhase', )
   root.addObject('BVHNarrowPhase', )
   root.addObject('CollisionResponse', name="Response")
   root.addObject('NewProximityIntersection', alarmDistance="0.002", contactDistance="0.001")

   floor = root.addChild('Floor')

   floor.addObject('RegularGridTopology', nx="2", ny="1", nz="2", xmin="20", xmax="-20", ymin="-3.05", ymax="-3.05", zmin="-20", zmax="20")
   floor.addObject('MechanicalObject', )

   visu = Floor.addChild('Visu')

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

   square_cloth1 = root.addChild('SquareCloth1')

   square_cloth1.addObject('EulerImplicitSolver', rayleighMass="0.05", rayleighStiffness="0.1")
   square_cloth1.addObject('CGLinearSolver', iterations="10", threshold="0.000001", tolerance="1e-5")
   square_cloth1.addObject('RegularGridTopology', nx="100", ny="1", nz="100", xmin="12", xmax="-12", ymin="7", ymax="7", zmin="-12", zmax="12")
   square_cloth1.addObject('MechanicalObject', )
   square_cloth1.addObject('UniformMass', totalMass="100")
   square_cloth1.addObject('BoxConstraint', box="-12 7 12 -10 7 12    10 7 12 12 7 12")
   square_cloth1.addObject('MeshSpringForceField', name="Springs", stiffness="1000", damping="0")
   square_cloth1.addObject('QuadBendingSprings', name="Bend", stiffness="2000", damping="1")
   square_cloth1.addObject('SphereForceField', stiffness="1000", damping="1", center="0 1 3", radius="4")
   square_cloth1.addObject('PlaneForceField', stiffness="1000", damping="20", normal="0 1 0", d="-3")
   square_cloth1.addObject('SpatialGridContainer', cellWidth="0.2", autoUpdate="false", showGrid="false")
   square_cloth1.addObject('ParticlesRepulsionForceField', distance="0.2", stiffness="1000")

   visu = SquareCloth1.addChild('Visu')

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

   node = SquareCloth1.addChild('node')

   node.addObject('RegularGridTopology', nx="4", ny="1", nz="4", xmin="12", xmax="-12", ymin="7", ymax="7", zmin="-12", zmax="12")
   node.addObject('MechanicalObject', )
   node.addObject('SphereCollisionModel', radius="1.0", contactStiffness="1")
   node.addObject('SubsetMapping', )

   sphere = root.addChild('Sphere')

   sphere.addObject('MeshOBJLoader', name="meshLoader_0", filename="mesh/sphere.obj", scale="3.95", handleSeams="1")
   sphere.addObject('OglModel', name="Visual", src="@meshLoader_0", dx="0", dy="1", dz="3", color="blue")