How to create a Mesh Sizing object scoped to all Solid bodies?

Nikos Kallitsis
Nikos Kallitsis Member, Employee Posts: 38
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I have a Model that contains Solids, Surfaces, and Lines (Beams). I want to create a Mesh Sizing object scoped to all active Solid bodies. The Sizing Type should be Sphere of Influence. Is there a way to do this automatically?

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  • Nikos Kallitsis
    Nikos Kallitsis Member, Employee Posts: 38
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    Answer ✓

    In order to make the process automatic, it's required to use a Mesh object that has a specified name. This way, the code can go through the objects in the Mesh group and check whether the one with the specified name exists. If it exists, then the script will only modify the scoping of the object. Otherwise, the code will create a Mesh object with the parameters specified in the script itself by the user.

    A Python Code object can be used under the Model group with an 'After Geometry Changed' callback, so that the code is triggered each time the Geometry is updated. The code to use is:

    # Parameters
meshObjName = 'Element Sizing - Sphere of Influence'

# Parameters if mesh object does not exist
csName = 'Coordinate System'
meshSphereRadius = 5
meshElementSize = 2
meshUnits = 'mm'

# Select Solids that are unsuppressed
solidsList = []
for obj in DataModel.Project.Model.Geometry.GetBodies():
    if obj.GeometryType == GeometryType.Solid and not obj.ObjectState == ObjectState.Suppressed:
        solidsList.append(obj)

selection = ExtAPI.SelectionManager.CreateSelectionInfo(SelectionTypeEnum.GeometryEntities)
selection.Ids = [solid.GetGeoBody().Id for solid in solidsList]

# Create / Modify mesh object
meshGroup = DataModel.Project.Model.Mesh

if meshObjName not in [meshChild.Name for meshChild in meshGroup.Children]:
    meshObj = meshGroup.AddSizing()
    meshObj.Name = meshObjName

    meshObj.Location = selection
    meshObj.Type = SizingType.SphereOfInfluence
    csObj = DataModel.GetObjectsByName(csName)[0]
    meshObj.SphereCenter = csObj

    meshObj.SphereRadius = Quantity(meshSphereRadius, meshUnits)
    meshObj.ElementSize = Quantity(meshElementSize, meshUnits)

elif meshObjName in [meshChild.Name for meshChild in meshGroup.Children]:
    meshObj = DataModel.GetObjectsByName(meshObjName)[0]
    meshObj.Location = selection

    This script can be also executed manually in the Mechanical Scripting interface.

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