## Facet.SubComponent

### Introduced

v2.0

### Description

Creates a SubComponent from this facet. The new SubComponent allows you to access the specific type of Geometry, such as a PolygonFace for a PolygonMesh object vs. a NurbsSurface for a NurbsSurfaceMesh.

### C# Syntax

    // get accessor
    SubComponent rtn = Facet.SubComponent;

### Examples

#### 1. VBScript Example

    '
    ' This example demonstrates how to work with a subset of facets on a polygon mesh
    '
    NewScene , false
    dim oObj, oSubComponent
    set oObj = Application.ActiveSceneRoot.AddGeometry("Cube","MeshSurface")
    set oFacetColl = oObj.ActivePrimitive.Geometry.Facets
    set oSubComponent = oFacetColl(2).SubComponent
    Application.LogMessage oSubComponent & " has " & UBound(oSubComponent.ElementArray)+1 & _
            " components of type " & TypeName(oSubComponent.ComponentCollection(0))
    set oObj = Application.ActiveSceneRoot.AddGeometry("Cube","MeshSurface")
    set oSubComponent = oObj.ActivePrimitive.Geometry.Facets(2).SubComponent
    oSubComponent.AddElement 3
    Application.LogMessage oSubComponent & " has " & UBound(oSubComponent.ElementArray)+1 & _
            " components of type " & TypeName(oSubComponent.ComponentCollection(0))
    ' Expected results:
    'INFO : cube.poly[2] has 1 components of type PolygonFace
    'INFO : cube1.poly[2,3] has 2 components of type PolygonFace

#### 2. JScript Example

    /*
            This example demonstrates how to access a PolygonMesh-specific property.
            First it starts out getting the generic Facets collection. From the
            FacetCollection it creates a SubComponent. From the SubComponent, it gets
            the PolygonMesh-specific PolygonFaceCollection
    */
    NewScene( null, false );
    // Setup: create a PolygonMesh and get its facet collection
    var grid = Application.ActiveSceneRoot.AddGeometry( "Grid", "MeshSurface" );
    var fcs = grid.ActivePrimitive.Geometry.Facets;
    // Convert it to SubComponent and just for fun, consider only four facets
    var subcmp = fcs.SubComponent;
    var subset = new Array(27,28,35,36);
    subcmp.ElementArray = subset;
    // Now convert the SubComponent to a PolygonFaceCollection using the
    // SubComponent.ComponentCollection property and then loop through the
    // list of PolygonFaces, getting its adjacent neighbors
    var polyfaces = subcmp.ComponentCollection;
    for (var i=0; i<polyfaces.Count; i++) {
            Application.LogMessage( "PolygonFace[" + i + "] at index " + polyfaces(i) + " is next to..." );
            var adjacent = polyfaces(i).NeighborPolygons();
            for (var j=0; j<adjacent.Count; j++) {
                    Application.LogMessage( "\t...the PolygonFace at index " + adjacent(j).Index );
            }
    }
    // Expected results:
    //INFO : PolygonFace[0] at index PolygonFace is next to...
    //INFO :        ...the PolygonFace at index 19
    //INFO :        ...the PolygonFace at index 28
    //INFO :        ...the PolygonFace at index 35
    //INFO :        ...the PolygonFace at index 26
    //INFO : PolygonFace[1] at index PolygonFace is next to...
    //INFO :        ...the PolygonFace at index 20
    //INFO :        ...the PolygonFace at index 29
    //INFO :        ...the PolygonFace at index 36
    //INFO :        ...the PolygonFace at index 27
    //INFO : PolygonFace[2] at index PolygonFace is next to...
    //INFO :        ...the PolygonFace at index 27
    //INFO :        ...the PolygonFace at index 36
    //INFO :        ...the PolygonFace at index 43
    //INFO :        ...the PolygonFace at index 34
    //INFO : PolygonFace[3] at index PolygonFace is next to...
    //INFO :        ...the PolygonFace at index 28
    //INFO :        ...the PolygonFace at index 37
    //INFO :        ...the PolygonFace at index 44
    //INFO :        ...the PolygonFace at index 35

#### 3. Python Example

    #
    # This example demonstrates how to determine which polygons are selected
    # in the UI by using the SubComponent object via the Selection
    #
    app = Application
    app.NewScene( "", 0 )
    # Setup: create a polygon mesh and select some polygons on it
    disc = app.ActiveSceneRoot.AddGeometry( "Sphere", "MeshSurface" )
    app.Selection.Clear()
    app.Selection.SetAsText( disc.Name + ".poly[20,3,47,0,16,34,22]" );
    # When components are selected, the first member of the Selection
    # is returned as a CollectionItem which can then be converted to a
    # SubComponent object. From there, the ComponentCollection property
    # converts it to the proper collection type (in this case a
    # PolygonFaceCollection)
    selected = app.Selection(0).SubComponent.ComponentCollection
    for sel in selected :
            app.LogMessage( "poly[%s] is selected." % (sel.Index) )
    # Expected results:
    #INFO : poly[20] is selected.
    #INFO : poly[3] is selected.
    #INFO : poly[47] is selected.
    #INFO : poly[0] is selected.
    #INFO : poly[16] is selected.
    #INFO : poly[34] is selected.
    #INFO : poly[22] is selected.