Mesh Generation in SOFA

[MA]

Hello,
I am trying to convert the STL mesh to VTK mesh using the following code in SOFA

import Sofa

import os
path = os.path.dirname(os.path.abspath(__file__))+'/mesh/'

def createScene(rootNode):

        rootNode.createObject('VisualStyle', displayFlags='showForceFields showBehaviorModels')

        
        rootNode.createObject('RequiredPlugin', pluginName='CGALPlugin')
        rootNode.createObject('RequiredPlugin', pluginName='SofaExporter')
        rootNode.createObject('RequiredPlugin', pluginName='SoftRobots')
        
        
        rootNode.findData('gravity').value='-9810 0 0';
        
        node = rootNode.createChild('node')
        node.createObject('MeshSTLLoader', name='loader', filename=path+'Rope.stl')
        
        node.createObject('MeshGenerationFromPolyhedron', name='gen',inputPoints='@mesh.position', inputTriangles='@mesh.triangles', drawTetras='1')
        
        node.createObject('Mesh', position='@gen.outputPoints', tetrahedra='@gen.outputTetras')
        node.createObject('VTKExporter', filename='bunny', edges='0', tetras='1', exportAtBegin='1')
        node.createObject('MeshGenerationFromPolyhedron',
                                inputPoints='@mesh.position',
                                inputTriangles='@mesh.triangles',
                                drawTetras='1',
                                facetSize='0.35',
                                facetApproximation='0.1',
                                cellRatio='2',
                                cellSize='0.5' )

it gives me the following in the console

 - MeshTopology: 1 created with alias "Mesh"
[INFO]    [SceneCheckerVisitor] Finished validating node "root".
[INFO]    [VTKExporter(VTKExporter)] VTKExporter: found topology Mesh
[INFO]    [VTKExporter(VTKExporter)] ### VTKExporter[VTKExporter] ###  
Nb points: 0  
Nb edges: 0  
Nb triangles: 0  
Nb quads: 0  
Nb tetras: 0  
Nb hexas: 0  
### ###  
Total nb cells: 0  

[INFO]    [VTKExporter(VTKExporter)] Export VTK XML in file bunny0.vtu  done.
[WARNING] [RealGUI] Global Bounding Box seems very small; Your viewer settings (based on the bbox) are likely invalid, switching to default value of [-1,-1,-1,1,1,1].This is caused by using component which does not implement properly the updateBBox function.You can remove this warning by manually forcing a value in the parameter bbox="minX minY minZ maxX maxY maxZ" in your root node 

[INFO]    [SceneCheckerVisitor] Validating node "root" with checks: [SceneCheckAPIChange, SceneCheckDuplicatedName, SceneCheckMissingRequiredPlugin]
[INFO]    [SceneCheckAPIChange] No 'APIVersion' component in scene. Using the default APIVersion level: 17.06
[WARNING] [SceneCheckDuplicatedName]   
- Found duplicated names ['RequiredPlugin', ] in node ''  
Nodes with similar names at the same level in your scene can crash certain operations, please rename them
[INFO]    [SceneCheckerVisitor] Finished validating node "root".

The mesh in blender is okay,I am attaching the file https://gofile.io/?c=0VSgmD

I dont know how to solvw it, I dont have much experience in this regard, but the mesh is correct, no errors,i can read the details in blender. I am supposed todo physical simulation to test the mechanical properties of the yarn

[Author]

Posts