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LineProjectiveConstraint

Attach given particles to their initial positions.

Vec2d

Templates:

  • Vec2d

Target: Sofa.Component.Constraint.Projective

namespace: sofa::component::constraint::projective

parents:

  • ProjectiveConstraintSet

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
group ID of the group containing this constraint. This ID is used to specify which constraints are solved by which solver, by specifying in each solver which groups of constraints it should handle. 0
endTime The constraint stops acting after the given value. Use a negative value for infinite constraints -1
indices Indices of the fixed points
origin A point in the line 0 0
direction Direction of the line 0 0
Visualization
drawSize Size of the rendered particles (0 -> point based rendering, >0 -> radius of spheres) 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<Vec2d>
topology link to the topology container BaseMeshTopology

Vec3d

Templates:

  • Vec3d

Target: Sofa.Component.Constraint.Projective

namespace: sofa::component::constraint::projective

parents:

  • ProjectiveConstraintSet

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
group ID of the group containing this constraint. This ID is used to specify which constraints are solved by which solver, by specifying in each solver which groups of constraints it should handle. 0
endTime The constraint stops acting after the given value. Use a negative value for infinite constraints -1
indices Indices of the fixed points
origin A point in the line 0 0 0
direction Direction of the line 0 0 0
Visualization
drawSize Size of the rendered particles (0 -> point based rendering, >0 -> radius of spheres) 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

LineProjectiveConstraint.scn

<?xml version="1.0"?>
<Node   name="root" gravity="0 0 0" dt="0.05"  >
    <RequiredPlugin name="Sofa.Component.Constraint.Projective"/> <!-- Needed to use components [FixedProjectiveConstraint LineProjectiveConstraint] -->
    <RequiredPlugin name="Sofa.Component.Engine.Select"/> <!-- Needed to use components [BoxROI] -->
    <RequiredPlugin name="Sofa.Component.IO.Mesh"/> <!-- Needed to use components [GridMeshCreator] -->
    <RequiredPlugin name="Sofa.Component.LinearSolver.Iterative"/> <!-- Needed to use components [CGLinearSolver] -->
    <RequiredPlugin name="Sofa.Component.Mass"/> <!-- Needed to use components [UniformMass] -->
    <RequiredPlugin name="Sofa.Component.MechanicalLoad"/> <!-- Needed to use components [EdgePressureForceField] -->
    <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.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
    <RequiredPlugin name="Sofa.Component.Topology.Container.Dynamic"/> <!-- Needed to use components [EdgeSetGeometryAlgorithms EdgeSetTopologyContainer EdgeSetTopologyModifier TriangleSetGeometryAlgorithms TriangleSetTopologyContainer TriangleSetTopologyModifier] -->
    <RequiredPlugin name="Sofa.Component.Topology.Mapping"/> <!-- Needed to use components [Triangle2EdgeTopologicalMapping] -->
    <RequiredPlugin name="Sofa.Component.Visual"/> <!-- Needed to use components [VisualStyle] -->
    <VisualStyle displayFlags="hideVisualModels showBehavior" />
    <DefaultAnimationLoop />
    <DefaultVisualManagerLoop />

    <Node   name="Square"  >
        <EulerImplicitSolver name="Euler Implicit"  printLog="0"  rayleighStiffness="0.5"  rayleighMass="0.5"  vdamping="0"  />
        <CGLinearSolver template="GraphScattered" name="CG Solver"  printLog="0"  iterations="40"  tolerance="1e-06"  threshold="1e-10" />
        <GridMeshCreator name="loader" resolution="5 5" trianglePattern="1" rotation="0 0 0 " scale="1 1 0" />
        <MechanicalObject template="Vec3" name="mObject1" position="@loader.position"    showIndices="false" showIndicesScale="0.001" />
        <TriangleSetTopologyContainer name="Container"  position="@loader.position"  edges="@loader.edges"  triangles="@loader.triangles" />
        <TriangleSetTopologyModifier name="Modifier" />
        <TriangleSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
        <UniformMass totalMass="1"  />
        <TriangularFEMForceField template="Vec3" name="FEM"  method="large"  poissonRatio="0.3"  youngModulus="20" />
        <BoxConstraint box="-0.05 -0.05 -0.05    0.05 0.05 0.05" drawBoxes="1"  />
        <BoxROI box="-0.05 -0.05 -0.05    0.05 1.05 0.05" drawBoxes="1" name="ProjectToLine"/>
        <LineProjectiveConstraint direction="0.1 1 0" indices="@[-1].indices" drawSize="0.03" />
        <Node   name="Boundary Edges"  >
            <EdgeSetTopologyContainer name="Container" />
            <EdgeSetTopologyModifier name="Modifier" />
            <EdgeSetGeometryAlgorithms template="Vec3" name="GeomAlgo"  drawEdges="1" />
            <Triangle2EdgeTopologicalMapping name="Mapping"  input="@../Container"  output="@Container" />
            <BoxROI box="0.95 -0.05 -0.05    1.05 1.05 0.05" drawBoxes="1" position="@../mObject1.rest_position" drawEdges="1" edges="@Container.edges" name="pressureBox" />
            <EdgePressureForceField template="Vec3" name="edgePressureFF0"  edgeIndices="@pressureBox.edgeIndices" binormal="0 0 1"  p_intensity="-10" showForces="1" arrowSizeCoef="1"/>
        </Node>
    </Node>
</Node>

def createScene(root_node):

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

   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.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('VisualStyle', displayFlags="hideVisualModels showBehavior")
   root.addObject('DefaultAnimationLoop', )
   root.addObject('DefaultVisualManagerLoop', )

   square = root.addChild('Square')

   square.addObject('EulerImplicitSolver', name="Euler Implicit", printLog="0", rayleighStiffness="0.5", rayleighMass="0.5", vdamping="0")
   square.addObject('CGLinearSolver', template="GraphScattered", name="CG Solver", printLog="0", iterations="40", tolerance="1e-06", threshold="1e-10")
   square.addObject('GridMeshCreator', name="loader", resolution="5 5", trianglePattern="1", rotation="0 0 0 ", scale="1 1 0")
   square.addObject('MechanicalObject', template="Vec3", name="mObject1", position="@loader.position", showIndices="false", showIndicesScale="0.001")
   square.addObject('TriangleSetTopologyContainer', name="Container", position="@loader.position", edges="@loader.edges", triangles="@loader.triangles")
   square.addObject('TriangleSetTopologyModifier', name="Modifier")
   square.addObject('TriangleSetGeometryAlgorithms', template="Vec3", name="GeomAlgo")
   square.addObject('UniformMass', totalMass="1")
   square.addObject('TriangularFEMForceField', template="Vec3", name="FEM", method="large", poissonRatio="0.3", youngModulus="20")
   square.addObject('BoxConstraint', box="-0.05 -0.05 -0.05    0.05 0.05 0.05", drawBoxes="1")
   square.addObject('BoxROI', box="-0.05 -0.05 -0.05    0.05 1.05 0.05", drawBoxes="1", name="ProjectToLine")
   square.addObject('LineProjectiveConstraint', direction="0.1 1 0", indices="@[-1].indices", drawSize="0.03")

   boundary__edges = Square.addChild('Boundary Edges')

   boundary__edges.addObject('EdgeSetTopologyContainer', name="Container")
   boundary__edges.addObject('EdgeSetTopologyModifier', name="Modifier")
   boundary__edges.addObject('EdgeSetGeometryAlgorithms', template="Vec3", name="GeomAlgo", drawEdges="1")
   boundary__edges.addObject('Triangle2EdgeTopologicalMapping', name="Mapping", input="@../Container", output="@Container")
   boundary__edges.addObject('BoxROI', box="0.95 -0.05 -0.05    1.05 1.05 0.05", drawBoxes="1", position="@../mObject1.rest_position", drawEdges="1", edges="@Container.edges", name="pressureBox")
   boundary__edges.addObject('EdgePressureForceField', template="Vec3", name="edgePressureFF0", edgeIndices="@pressureBox.edgeIndices", binormal="0 0 1", p_intensity="-10", showForces="1", arrowSizeCoef="1")