public G3DAdapter(IG3D g3D)
{
//g3D.Validate();
G3D = g3D;
FaceSizes = g3D.FaceSizes();
PointsPerFace = g3D.HasFixedFaceSize() ? g3D.FirstFaceSize() : 0;
Vertices = g3D.VertexAttribute.ToVector3s();
Indices = g3D.CornerVertexIndices();
NumFaces = g3D.FaceCount();
FaceIndices = g3D.FaceIndices();
MaterialIds = g3D.MaterialIds();
}