/// <summary>
/// Build or rebuild a single tile for this layer
/// </summary>
/// <param name="inputVertices">Input vertex data for the input mesh</param>
/// <param name="inputIndices">Input index data for the input mesh</param>
/// <param name="boundingBox">Bounding box of the tile</param>
/// <param name="tileCoordinate">Tile coordinate to of the tile to build</param>
/// <returns>The tile that was built</returns>
public NavigationMeshTile BuildTile(Vector3[] inputVertices, int[] inputIndices,
BoundingBox boundingBox, Point tileCoordinate)
{
// Remove old tile
if (TilesInternal.ContainsKey(tileCoordinate))
{
TilesInternal.Remove(tileCoordinate);
}
NavigationMeshTile tile = BuildTileInternal(inputVertices, inputIndices, boundingBox, tileCoordinate);
if (tile?.Data != null)
{
// Add
TilesInternal.Add(tileCoordinate, tile);
}
return(tile);
}
/// <summary>
/// Builds a single tile for a given layer without adding it
/// </summary>
/// <param name="inputVertices">Input vertex data for the input mesh</param>
/// <param name="inputIndices">Input index data for the input mesh</param>
/// <param name="boundingBox">Bounding box of the tile</param>
/// <param name="tileCoordinate">Tile coordinate to of the tile to build</param>
/// <returns>Teh tile that was built</returns>
private unsafe NavigationMeshTile BuildTileInternal(Vector3[] inputVertices, int[] inputIndices,
BoundingBox boundingBox, Point tileCoordinate)
{
// Turn settings into native structure format
NavigationAgentSettings agentSettings = AgentSettings;
NavigationMeshTile tile = new NavigationMeshTile();
// Initialize navigation builder
IntPtr nav = Navigation.CreateBuilder();
// Turn build settings into native structure format
Navigation.BuildSettings internalBuildSettings = new Navigation.BuildSettings
{
// Tile settings
BoundingBox = boundingBox,
TilePosition = tileCoordinate,
TileSize = BuildSettings.TileSize,
// General build settings
CellHeight = BuildSettings.CellHeight,
CellSize = BuildSettings.CellSize,
RegionMinArea = BuildSettings.MinRegionArea,
RegionMergeArea = BuildSettings.RegionMergeArea,
EdgeMaxLen = BuildSettings.MaxEdgeLen,
EdgeMaxError = BuildSettings.MaxEdgeError,
DetailSampleDist = BuildSettings.DetailSamplingDistance,
DetailSampleMaxError = BuildSettings.MaxDetailSamplingError,
// Agent settings
AgentHeight = agentSettings.Height,
AgentRadius = agentSettings.Radius,
AgentMaxClimb = agentSettings.MaxClimb,
AgentMaxSlope = agentSettings.MaxSlope.Degrees
};
Navigation.SetSettings(nav, new IntPtr(&internalBuildSettings));
// Generate mesh
Navigation.GeneratedData data;
IntPtr ret = Navigation.Build(nav, inputVertices.ToArray(), inputVertices.Length, inputIndices.ToArray(), inputIndices.Length);
Navigation.GeneratedData *dataPtr = (Navigation.GeneratedData *)ret;
data = *dataPtr;
// Copy output data on success
if (data.Success)
{
List <Vector3> outputVerts = new List <Vector3>();
if (data.NumNavmeshVertices > 0)
{
Vector3 *navmeshVerts = (Vector3 *)data.NavmeshVertices;
for (int j = 0; j < data.NumNavmeshVertices; j++)
{
outputVerts.Add(navmeshVerts[j]);
}
tile.MeshVertices = outputVerts.ToArray();
}
// Copy the generated navigationMesh data
tile.Data = new byte[data.NavmeshDataLength];
Marshal.Copy(data.NavmeshData, tile.Data, 0, data.NavmeshDataLength);
}
// Cleanup builder
Navigation.DestroyBuilder(nav);
return(tile);
}