PointsFromIndices

Find the points given a list of indices.

Vec3d

Templates:

• Vec3d

Target: Sofa.Component.Engine.Select

namespace: sofa::component::engine::select

parents:

• DataEngine

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
Inputs
position	Position coordinates of the degrees of freedom
indices	Indices of the points
Outputs
indices_position	Coordinates of the points contained in indices

Links

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

PointsFromIndices.scn

XMLPython

<?xml version="1.0" ?>
<Node name="root" gravity="0 -9 1" dt="0.05">
    <RequiredPlugin name="Sofa.Component.Constraint.Projective"/> <!-- Needed to use components [FixedProjectiveConstraint] -->
    <RequiredPlugin name="Sofa.Component.Engine.Select"/> <!-- Needed to use components [BoxROI PointsFromIndices] -->
    <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.Mass"/> <!-- Needed to use components [DiagonalMass] -->
    <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.SolidMechanics.Spring"/> <!-- Needed to use components [TriangularBendingSprings] -->
    <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] -->
    <VisualStyle displayFlags="showForceFields" />
    <DefaultAnimationLoop/>

    <Node name="SquareGravity" gravity="0 -9.81 0">
        <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="true"/>
        <MechanicalObject src="@loader" template="Vec3" name="mecaObj" scale3d="10 10 10" restScale="1" />
        <TriangleSetTopologyContainer src="@loader" name="Container" />
        <TriangleSetTopologyModifier name="Modifier" />
        <TriangleSetGeometryAlgorithms template="Vec3" name="GeomAlgo" />
        <DiagonalMass name="default5" massDensity="0.15" />
        <BoxROI template="Vec3" name="FixedROI" box="2 9.5 -0.5 8 10.5 0.5" drawBoxes="1" position="@mecaObj.rest_position" computeTriangles="0" computeTetrahedra="0" computeEdges="0" />
        <FixedProjectiveConstraint template="Vec3" name="default6" indices="@FixedROI.indices" />
        <TriangularFEMForceField template="Vec3" name="FEM" method="large" poissonRatio="0.3" youngModulus="60" />
        <TriangularBendingSprings template="Vec3" name="FEM-Bend" stiffness="300" damping="1" />

        <PointsFromIndices name="PFI" position="@mecaObj.position" indices="10 20 30" />

        <Node name="Selection" >
            <MechanicalObject template="Vec3" position="@../PFI.indices_position" name="SelectedDOFs" showIndices="1" showIndicesScale="0.2"  />
        </Node>

    </Node>
</Node>

def createScene(root_node):

   root = root_node.addChild('root', gravity="0 -9 1", 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.ODESolver.Backward")
   root.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.FEM.Elastic")
   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('VisualStyle', displayFlags="showForceFields")
   root.addObject('DefaultAnimationLoop', )

   square_gravity = root.addChild('SquareGravity', gravity="0 -9.81 0")

   square_gravity.addObject('EulerImplicitSolver', name="cg_odesolver", printLog="false", rayleighStiffness="0.1", rayleighMass="0.1")
   square_gravity.addObject('CGLinearSolver', iterations="25", name="linear solver", tolerance="1.0e-9", threshold="1.0e-9")
   square_gravity.addObject('MeshGmshLoader', name="loader", filename="mesh/square3.msh", createSubelements="true")
   square_gravity.addObject('MechanicalObject', src="@loader", template="Vec3", name="mecaObj", scale3d="10 10 10", restScale="1")
   square_gravity.addObject('TriangleSetTopologyContainer', src="@loader", name="Container")
   square_gravity.addObject('TriangleSetTopologyModifier', name="Modifier")
   square_gravity.addObject('TriangleSetGeometryAlgorithms', template="Vec3", name="GeomAlgo")
   square_gravity.addObject('DiagonalMass', name="default5", massDensity="0.15")
   square_gravity.addObject('BoxROI', template="Vec3", name="FixedROI", box="2 9.5 -0.5 8 10.5 0.5", drawBoxes="1", position="@mecaObj.rest_position", computeTriangles="0", computeTetrahedra="0", computeEdges="0")
   square_gravity.addObject('FixedProjectiveConstraint', template="Vec3", name="default6", indices="@FixedROI.indices")
   square_gravity.addObject('TriangularFEMForceField', template="Vec3", name="FEM", method="large", poissonRatio="0.3", youngModulus="60")
   square_gravity.addObject('TriangularBendingSprings', template="Vec3", name="FEM-Bend", stiffness="300", damping="1")
   square_gravity.addObject('PointsFromIndices', name="PFI", position="@mecaObj.position", indices="10 20 30")

   selection = SquareGravity.addChild('Selection')

   selection.addObject('MechanicalObject', template="Vec3", position="@../PFI.indices_position", name="SelectedDOFs", showIndices="1", showIndicesScale="0.2")