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| Class | Attribute | Semantics |
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| HexGridCell | Dist:float | The Euclidean distance to the nearest site cell |
| posX:int | X coordinate of the grid cell in the grid map |
| posY:int | Y coordinate of the grid cell in the grid map |
| voro:bool | A mark indicating if the grid cell belongs to the GVD |
| obstX:int | X coordinate of the nearest site cell |
| obstY:int | Y coordinate of the nearest site cell |
| sID:int | Identifier of the nearest site, determined by the sequence that the site is created |
| toRaise:bool | A mark indicating the propagation type of this grid (raised or lowered) |
|
| EdgeCell | ID:int | The index of the edge cell in the hash table |
| sIDp1:int | Identifier indicating one of the two sites divided by this edge cell |
| sIDp2:int | Identifier indicating the other site divided by this edge cell |
|
| Edge | ID:int | The index of the edge in the hash table |
| cMap : HexGridCell | A hash table storing the edge cells indexed by their coordinates |
| vIDp1:int | Identifier indicating one of the two vertices of the edge |
| vIDp2:int | Identifier indicating the other vertex of the edge |
| sIDp1:int | Identifier indicating one of the two sites divided by this edge |
| sIDp2:int | Identifier indicating the other site divided by this edge |
|
| Vertex | ID:int | The index of the GVD vertex in the hash table |
| posX:int | X coordinate of the GVD vertex |
| posY:int | Y coordinate of the GVD vertex |
| eIDs:list<int> | A list storing the IDs of the edges that are connected to the vertex |
| sIDs:list<int> | A list storing the IDs of the sites that are connected to the vertex |
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| GVD | gMap:array<HexGridCell> | A unique 2D array managing GVD matrices |
| eMap:EdgeMap | A unique hash table storing the instances of GVD edges |
| vMap:VertexMap | A unique hash table storing the instances of GVD vertices |
| sMap:SiteMap | A unique hash table storing the corresponding spatial object of GVDs |
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