[SOLVED] SubsetMultiMapping shows errors

[shang]

hi everyone, does anyone have used SubsetMultiMapping?
actually,I want to use SubsetMultiMapping to map from a controlling point to the tip of a BeamFEM physical model(guidewire),
but there exists unclear problems in it, I can not really find any problems in my scene, does any can help me?
the xml file is illustrated below:

<Node 	 name="root"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
	<VisualStyle displayFlags="hideVisual showBehavior hideCollisionModels showMapping" />
	<DefaultAnimationLoop name="defaultAnimationLoop" />
	<DefaultVisualManagerLoop name="defaultVisualManagerLoop" />	
	
	<Node 	 name="simulatedScene"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
		<EulerImplicitSolver tolerance="0.001" maxIt="1000"/>
                <CGLinearSolver name="linear solver" iterations="25" tolerance="1e-09" threshold="1e-09" />
		
		<Node 	 name="rigidNode"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
			<MechanicalObject template="Rigid3d" name="rigidNode_dof"  position="0 0 0 0 0 0 1" /> 
			<!-- <UniformMass template="Rigid" name="rigidNode_mass"   totalmass="1"   /> -->
			<FixedConstraint template="Rigid3d" name="rigidNode_fixedConstraint" indices="0"  />
			<Node 	 name="mappedParticles"  gravity="0 -10 0"  dt="0.01">
				<MechanicalObject template="Rigid3d" name="mappedParticles_dof"  position="0 0 0 0 0 0 1 " />
				<FixedConstraint template="Rigid3d" name="rigidNode_fixedConstraint" index="0"  />
				<RigidRigidMapping template="Rigid3d,Rigid3d" name="mappedParticles_mapping"   input="@/simulatedScene/rigidNode/rigidNode_dof"  output="@mappedParticles_dof" />
			</Node>
		</Node>
		
		<Node 	 name="independentParticles"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
			<MechanicalObject template="Rigid3d" name="independentParticles_dof"  position="1 0 0 0 0 0 1 2 0 0 0 0 0 1 3 0 0 0 0 0 1 4 0 0 5 0 0 0 0 0 1 "   restScale="1" />
			<Node 	 name="deformableGrid"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
				<MechanicalObject template="Rigid3d" name="deformableGrid_dof"  position="0 0 0 0 0 0 1 1 0 0 0 0 0 1 2 0 0 0 0 0 1 3 0 0 0 0 0 1 4 0 0 0 0 0 1 5 0 0 0 0 0 1" />
				<Mesh name="lines" lines="0 1 1 2 2 3 3 4 4 5" />
				<SubsetMultiMapping template="Rigid3d,Rigid3d" name="deformableGrid_mapping"  indexPairs="1 0 0 0 0 1 0 2 0 3 0 4"  input="@/simulatedScene/independentParticles/independentParticles_dof @/simulatedScene/rigidNode/mappedParticles/mappedParticles_dof"  output="@deformableGrid_dof" />
				
	                        <BeamFEMForceField name="deformableBeam"    poissonRatio="0.7"  youngModulus="10000000000"  radius="0.07" />
			</Node>
		</Node>
	</Node>
</Node>

the error showed in the console is “################ SIG11 – SIGSEGV: segfault ##########”

[Hugo]

Dear Xiaojuan,

First note that in your scene, tolerance and maxIt defined in EulerImplicitSolver are useless.

Moreover, your problem comes from the initialization of the MechanicalObject “independentParticles_dof”. Look at the position field, the 4th rigid particle is wrong defined (the quaternion is missing).

Here is a corrected version of your scene:

<Node    name="root"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
    <VisualStyle displayFlags="hideVisual showBehavior hideCollisionModels showMapping" />
    <DefaultAnimationLoop name="defaultAnimationLoop" />
    <DefaultVisualManagerLoop name="defaultVisualManagerLoop" />    
    
    <Node    name="simulatedScene"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
        <EulerImplicitSolver />
        <CGLinearSolver name="linear solver" iterations="25" tolerance="1e-09" threshold="1e-09" />
        
        <Node    name="rigidNode"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
            <MechanicalObject template="Rigid3d" name="rigidNode_dof"  position="0 0 0 0 0 0 1" /> 
            <FixedConstraint template="Rigid3d" name="rigidNode_fixedConstraint" indices="0"  />
            <Node    name="mappedParticles"  gravity="0 -10 0"  dt="0.01">
                <MechanicalObject template="Rigid3d" name="mappedParticles_dof"  position="0 0 0 0 0 0 1 " />
                <FixedConstraint template="Rigid3d" name="rigidNode_fixedConstraint" indices="0"  />
                <RigidRigidMapping template="Rigid3d,Rigid3d" name="mappedParticles_mapping"   input="@/simulatedScene/rigidNode/rigidNode_dof"  output="@mappedParticles_dof" />
            </Node>
        </Node>
        
        <Node    name="independentParticles"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
            <MechanicalObject template="Rigid3d" name="independentParticles_dof"  position="1 0 0 0 0 0 1 2 0 0 0 0 0 1 3 0 0 0 0 0 1 4 0 0 0 0 0 1 5 0 0 0 0 0 1 "   restScale="1" />
            <Node    name="deformableGrid"  gravity="0 -10 0"  dt="0.01"  time="0"  animate="0"  >
                <MechanicalObject template="Rigid3d" name="deformableGrid_dof"  position="0 0 0 0 0 0 1 1 0 0 0 0 0 1 2 0 0 0 0 0 1 3 0 0 0 0 0 1 4 0 0 0 0 0 1 5 0 0 0 0 0 1" />
                <Mesh name="lines" lines="0 1 1 2 2 3 3 4 4 5" />
                <SubsetMultiMapping template="Rigid3d,Rigid3d" name="deformableGrid_mapping"  indexPairs="1 0 0 0 0 1 0 2 0 3 0 4"  input="@../independentParticles_dof @../../rigidNode/mappedParticles/mappedParticles_dof"  output="@deformableGrid_dof" />
                
                <BeamFEMForceField name="deformableBeam"    poissonRatio="0.7"  youngModulus="10000000000"  radius="0.07" />
            </Node>
        </Node>
    </Node>
</Node>

Let me know if this helps (it should 😉 )

Hugo

[shang]

Sorry for my late reply, Hugo, it is very nice of you to help me, I see where the error comes from, I will try the correct version of .scn file ASAP, thank you again!

[Hugo]

Hi Xiaojuan,

No worries, do not hesitate to set this topic as solved as soon as it works for you!
Cheers,

Hugo

[shang]

dear Hugo, it is solved! thank you!!

[Author]

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