A PolygonMesh is a kind of Geometry. You can navigate a polygon mesh using generic objects such as Facet, Segment, Point and Sample or you can navigate using objects that are specific to the PolygonMesh such as PolygonFace, Edge, Vertex and PolygonNode.

AddCluster	AddEmptyCluster	AddICEAttribute	AddVertexColor
ConstructPointLocators	CreateSubComponent	EvaluateClusterProperty	EvaluateNormals
EvaluatePositions	Get	Get2	GetApproximatedMesh
GetApproximatedMeshAndAttributes	GetBoundingBox	GetBoundingCapsule	GetBoundingSphere
GetClosestLocations	GetClosestLocationsWithinRadius	GetICEAttributeFromName	GetPolygonIndexArray
GetRaycastIntersections	GetSurfacePointLocatorsFromPoints	GetTriangleNodeIndexArray	GetTriangleVertexIndexArray
GetTriangleWeightArray	IsClassOf	IsEqualTo	RemoveICEAttribute
SaveShapeKey	Set	SetupPointLocatorQueries

Application	Cache	Categories	Clusters
CurrentVertexColor	Edges	Facets	FullName
Help	ICEAttributes	Name	NestedObjects
Nodes	Origin	OriginPath	Parent
Points	Polygons	Samples	Segments
Triangles	Type	VertexColors	Vertices

VBScript Example

set oObject = Application.ActiveProject.ActiveScene.Root.AddGeometry("Cube","MeshSurface")
set oPolygonMesh = oObject.ActivePrimitive.Geometry

Primitive.Geometry X3DObject.AddPolygonMesh