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 # Geometry selection methods

 Last update: 22.04.2026 

Geometry selections are required for almost any Speos object definition. They can be performed using the SpaceClaim selection.

- Generic object selection can be performed using the SpaceClaim
    
    ```ironpython
    Geometries can be set using the SpaceClaim Selection:
    geometry1 = GetRootPart().Bodies[3]
    geometry2 = GetRootPart().Bodies[8]
    geometry3 = GetRootPart().Bodies[10]
    newMaterial.VolumeGeometries.Set(Selection.Create([geometry1, geometry2, geometry3]))
    
    ```
    
    ```ironpython
    Selection.Create(GetRootPart().Bodies[3]).SetActive()
    Selection.Create(GetRootPart().Bodies[8]).AddToActive()
    Selection.Create(GetRootPart().Bodies[10]).AddToActive()
    newMaterial.VolumeGeometries.Set(Selection.GetActive())
    
    ```
- Origin or directions selection
    
    ```ironpython
    displaySource = SpeosSim.SourceDisplay.Create()
    displayOrigin = Selection.Create(GetRootPart().CoordinateSystems[0])
    displaySource.OriginPoint.Set(displayOrigin)
    
    displayXDirection = Selection.Create(GetRootPart().CoordinateSystems[0].Axes[0])
    displaySource.XDirection.Set(displayXDirection)
    
    displayYDirection = Selection.Create(GetRootPart().CoordinateSystems[0].Axes[1])
    displaySource.YDirection.Set(displayYDirection)
    
    ```
- Oriented faces selection (used in surface sources or FOPs to orientate the normal to the selected faces)
    
    ```ironpython
    orientedFace = SpeosSim.OrientedFace.Create()
    emissiveFace = Selection.Create(GetRootPart().Bodies[7].Faces[0])
    orientedFace.Face.Set(emissiveFace)
    orientedFace.ReverseDirection = True 
    
    surfaceSource = SpeosSim.SourceSurface.Create()
    surfaceSource.EmissiveFaces.Add(orientedFace)
    
    ```