/// <summary>
/// Adds or replaces a tile in the navigation mesh
/// </summary>
/// <remarks>The coordinate of the tile is embedded inside the tile data header</remarks>
public unsafe bool AddOrReplaceTile(byte[] data)
{
fixed(byte *dataPtr = data)
{
DtTileHeader *header = (DtTileHeader *)dataPtr;
var coord = new int2(header->X, header->Y);
// Remove old tile if it exists
RemoveTile(coord);
TileCoordinates.Add(coord);
return(Navigation.NavMesh.AddTile(DtNavMesh, new IntPtr(dataPtr), data.Length) == 1);
}
}
public unsafe bool GetTileVertices(AiNativeList <float3> vertices, AiNativeList <int> indices)
{
if (Data == null || Data.Length == 0)
return(false);
fixed(byte *dataPtr = Data)
{
DtTileHeader *header = (DtTileHeader *)dataPtr;
if (header->VertCount == 0)
{
return(false);
}
int headerSize = Navigation.DtAlign4(sizeof(DtTileHeader));
int vertsSize = Navigation.DtAlign4(sizeof(float) * 3 * header->VertCount);
byte *ptr = dataPtr;
ptr += headerSize;
float3 *vertexPtr = (float3 *)ptr;
ptr += vertsSize;
DtPoly *polyPtr = (DtPoly *)ptr;
for (int i = 0; i < header->VertCount; i++)
{
vertices.Add(vertexPtr[i]);
}
for (int i = 0; i < header->PolyCount; i++)
{
// Expand polygons into triangles
var poly = polyPtr[i];
for (int j = 0; j <= poly.VertexCount - 3; j++)
{
indices.Add(poly.Vertices[0]);
indices.Add(poly.Vertices[j + 1]);
indices.Add(poly.Vertices[j + 2]);
}
}
return(true);
}
}
public unsafe void AppendStats(Dictionary <byte, int> stats)
{
if (Data == null || Data.Length == 0)
return;
fixed(byte *dataPtr = Data)
{
DtTileHeader *header = (DtTileHeader *)dataPtr;
if (header->VertCount == 0)
{
return;
}
int headerSize = Navigation.DtAlign4(sizeof(DtTileHeader));
int vertsSize = Navigation.DtAlign4(sizeof(float) * 3 * header->VertCount);
byte *ptr = dataPtr;
ptr += headerSize;
float3 *vertexPtr = (float3 *)ptr;
ptr += vertsSize;
DtPoly *polyPtr = (DtPoly *)ptr;
for (int i = 0; i < header->PolyCount; i++)
{
// Expand polygons into triangles
DtPoly poly = polyPtr[i];
if (!stats.TryGetValue(poly.AreaAndType, out int count))
{
stats[poly.AreaAndType] = 0;
}
stats[poly.AreaAndType]++;
}
}
}
