**Vertex_Points** | V | Vertex point positions | Point |

**Vertex_Outgoing_Halfedge** | V_He | One of the outgoing halfedges for each vertex | Integer |

**Halfedge_StartVertex** | He_V | The starting vertex of each halfedge | Integer |

**Halfedge_AdjacentFace** | He_F | The face bordered by each halfedge (or -1 if it is adjacent to a boundary) | Integer |

**Halfedge_NextHalfedge** | He_Nxt | The next halfedge around the same face | Integer |

**Halfedge_PrevHalfedge** | He_Prv | The previous halfedge around the same face | Integer |

**Halfedge_Pair** | He_P | The halfedge joining the same 2 vertices in the opposite direction | Integer |

**Face_Halfedge** | F_He | The first halfedge of each face | Integer |