/// <summary>
/// Returns the configuration parameters used to initialize the navigation mesh.
/// </summary>
/// <returns>The configuration parameters used to initialize the navigation mesh.</returns>
public NavmeshParams GetConfig()
{
NavmeshParams result = new NavmeshParams();
NavmeshEx.dtnmGetParams(root, result);
return(result);
}
/// <summary>
/// Creates an empty navigation mesh ready for tiles to be added.
/// </summary>
/// <remarks>
/// This is the method used when creating new multi-tile meshes.
/// Tiles are added using the <see cref="AddTile"/> method.
/// </remarks>
/// <param name="config">The mesh configuration.</param>
/// <param name="resultMesh">The result mesh.</param>
/// <returns>The <see cref="NavStatus"/> flags for the operation.
/// </returns>
public static NavStatus Create(NavmeshParams config
, out Navmesh resultMesh)
{
if (config == null || config.maxTiles < 1)
{
resultMesh = null;
return(NavStatus.Failure | NavStatus.InvalidParam);
}
IntPtr root = IntPtr.Zero;
NavStatus status = NavmeshEx.dtnmInitTiledNavMesh(config, ref root);
if (NavUtil.Succeeded(status))
{
resultMesh = new Navmesh(root);
}
else
{
resultMesh = null;
}
return(status);
}
internal bool GetMeshBuildData(Vector3 origin, float tileWorldSize, TileZone zone
, out NavmeshParams config
, out NavmeshTileData[] tiles)
{
// Is there anything to bake?
config = null;
tiles = null;
int maxPolyCount;
int tileCount;
BakeableCount(out tileCount, out maxPolyCount);
if (tileCount == 0)
return false;
config = new NavmeshParams(origin
, tileWorldSize, tileWorldSize
, Mathf.Max(1, tileCount)
, Mathf.Max(1, maxPolyCount));
// Add the tiles.
List<NavmeshTileData> ltiles = new List<NavmeshTileData>();
for (int tx = zone.xmin; tx <= zone.xmax; tx++)
{
for (int tz = zone.zmin; tz <= zone.zmax; tz++)
{
int trash;
NavmeshTileData td = GetTileData(tx, tz, out trash);
if (td == null)
// Tile is not available.
continue;
ltiles.Add(td);
}
}
tiles = ltiles.ToArray();
return true;
}
internal bool GetMeshBuildData(Vector3 origin, float tileWorldSize
, out NavmeshParams config
, out NavmeshTileData[] tiles)
{
return GetMeshBuildData(origin, tileWorldSize, new TileZone(0, 0, Width - 1, Depth - 1)
, out config, out tiles);
}
/// <summary>
/// Extracts the tile data from a serialized navigation mesh.
/// </summary>
/// <remarks>
/// <para>
/// Tile data is normally preserved by serializing
/// the the content of the <see cref="NavmeshTileData"/> objects used to
/// create the navigation mesh. That is the most efficient method
/// and should be used whenever possible.
/// </para>
/// <para>
/// This method can be used to extract the tile data when
/// the original data is not available. It should only be used as
/// a backup to the normal method since this method is not efficient.
/// </para>
/// <para>
/// Always check the header polygon count
/// of the resulting <see cref="NavmeshTileExtract"/> objects before use since some tiles
/// in the navigation mesh may be empty. The <see cref="NavmeshTileExtract.data"/>
/// field will be null for empty tiles.
/// </para>
/// </remarks>
/// <param name="serializedMesh">A valid serialized navigation mesh.</param>
/// <param name="tileData">
/// The extracted tile data. [Length: <see cref="Navmesh.GetMaxTiles()"/>]
/// </param>
/// <param name="config">The navigation mesh's configuration.</param>
/// <returns>The <see cref="NavStatus"/> flags for the operation.</returns>
public static NavStatus ExtractTileData(byte[] serializedMesh
, out NavmeshTileExtract[] tileData
, out NavmeshParams config)
{
/*
* Design notes:
*
* Normally, the only way to get tile data out of a navigation mesh
* is when the tile data is NOT owned by the mesh. This is not
* permitted for normal mesh objects, which is why the RemoveTile() method
* never returns the tile data.
*
* The most efficient way to extract the data is to get it directly
* from the serialized data. But that would be a code maintenance issue.
* (Duplicating the mesh creation process.) So I'm using this rather
* convoluted method instead.
*
*/
if (serializedMesh == null)
{
tileData = null;
config = null;
return NavStatus.Failure | NavStatus.InvalidParam;
}
Navmesh mesh;
NavStatus status = Navmesh.UnsafeCreate(serializedMesh, false, out mesh);
if ((status & NavStatus.Failure) != 0)
{
tileData = null;
config = null;
return status;
}
config = mesh.GetConfig();
int count = mesh.GetMaxTiles();
tileData = new NavmeshTileExtract[count];
if (count == 0)
return NavStatus.Sucess;
for (int i = 0; i < count; i++)
{
NavmeshTile tile = mesh.GetTile(i);
tileData[i].header = tile.GetHeader();
if (tileData[i].header.polyCount == 0)
// Tile not in use.
continue;
tileData[i].tileRef = tile.GetTileRef();
IntPtr tdata = new IntPtr();
int tsize = 0;
NavmeshEx.dtnmRemoveTile(mesh.root, tileData[i].tileRef, ref tdata, ref tsize);
tileData[i].data = UtilEx.ExtractArrayByte(tdata, tsize);
NavmeshEx.dtnmFreeBytes(ref tdata);
}
return NavStatus.Sucess;
}
/// <summary>
/// Creates an empty navigation mesh ready for tiles to be added.
/// </summary>
/// <remarks>
/// This is the method used when creating new multi-tile meshes.
/// Tiles are added using the <see cref="AddTile"/> method.
/// </remarks>
/// <param name="config">The mesh configuration.</param>
/// <param name="resultMesh">The result mesh.</param>
/// <returns>The <see cref="NavStatus"/> flags for the operation.
/// </returns>
public static NavStatus Create(NavmeshParams config
, out Navmesh resultMesh)
{
if (config == null || config.maxTiles < 1)
{
resultMesh = null;
return NavStatus.Failure | NavStatus.InvalidParam;
}
IntPtr root = IntPtr.Zero;
NavStatus status = NavmeshEx.dtnmInitTiledNavMesh(config, ref root);
if (NavUtil.Succeeded(status))
resultMesh = new Navmesh(root);
else
resultMesh = null;
return status;
}
/// <summary>
/// Returns the configuration parameters used to initialize the navigation mesh.
/// </summary>
/// <returns>The configuration parameters used to initialize the navigation mesh.</returns>
public NavmeshParams GetConfig()
{
NavmeshParams result = new NavmeshParams();
NavmeshEx.dtnmGetParams(root, result);
return result;
}
/// <summary>
/// Loads a navigation mesh.
/// </summary>
/// <param name="config">The mesh configuration.</param>
/// <param name="tiles">The tiles to add to the mesh.</param>
/// <param name="buildConfig">The build information. (Optional)</param>
/// <returns>The <see cref="NavStatus"/> flags for the operation.</returns>
public NavStatus Load(NavmeshParams config
, NavmeshTileData[] tiles
, NavmeshBuildInfo buildConfig)
{
if (config == null || tiles == null || tiles.Length > config.maxTiles)
return NavStatus.Failure | NavStatus.InvalidParam;
Navmesh navmesh;
NavStatus status = Navmesh.Create(config, out navmesh);
if ((status & NavStatus.Sucess) == 0)
return status;
foreach (NavmeshTileData tile in tiles)
{
if (tile == null)
continue;
uint trash;
status = navmesh.AddTile(tile, Navmesh.NullTile, out trash);
if ((status & NavStatus.Sucess) == 0)
return status | NavStatus.InvalidParam;
}
mDataPack = navmesh.GetSerializedMesh();
if (mDataPack == null)
return NavStatus.Failure;
mBuildInfo = buildConfig;
mVersion++;
return NavStatus.Sucess;
}
/// <summary>
/// Extracts the tile data from a serialized navigation mesh.
/// </summary>
/// <remarks>
/// <para>
/// Tile data is normally preserved by serializing
/// the the content of the <see cref="NavmeshTileData"/> objects used to
/// create the navigation mesh. That is the most efficient method
/// and should be used whenever possible.
/// </para>
/// <para>
/// This method can be used to extract the tile data when
/// the original data is not available. It should only be used as
/// a backup to the normal method since this method is not efficient.
/// </para>
/// <para>
/// Always check the header polygon count
/// of the resulting <see cref="NavmeshTileExtract"/> objects before use since some tiles
/// in the navigation mesh may be empty. The <see cref="NavmeshTileExtract.data"/>
/// field will be null for empty tiles.
/// </para>
/// </remarks>
/// <param name="serializedMesh">A valid serialized navigation mesh.</param>
/// <param name="tileData">
/// The extracted tile data. [Length: <see cref="Navmesh.GetMaxTiles()"/>]
/// </param>
/// <param name="config">The navigation mesh's configuration.</param>
/// <returns>The <see cref="NavStatus"/> flags for the operation.</returns>
public static NavStatus ExtractTileData(byte[] serializedMesh
, out NavmeshTileExtract[] tileData
, out NavmeshParams config)
{
/*
* Design notes:
*
* Normally, the only way to get tile data out of a navigation mesh
* is when the tile data is NOT owned by the mesh. This is not
* permitted for normal mesh objects, which is why the RemoveTile() method
* never returns the tile data.
*
* The most efficient way to extract the data is to get it directly
* from the serialized data. But that would be a code maintenance issue.
* (Duplicating the mesh creation process.) So I'm using this rather
* convoluted method instead.
*
*/
if (serializedMesh == null)
{
tileData = null;
config = null;
return(NavStatus.Failure | NavStatus.InvalidParam);
}
Navmesh mesh;
NavStatus status = Navmesh.UnsafeCreate(serializedMesh, false, out mesh);
if ((status & NavStatus.Failure) != 0)
{
tileData = null;
config = null;
return(status);
}
config = mesh.GetConfig();
int count = mesh.GetMaxTiles();
tileData = new NavmeshTileExtract[count];
if (count == 0)
{
return(NavStatus.Sucess);
}
for (int i = 0; i < count; i++)
{
NavmeshTile tile = mesh.GetTile(i);
tileData[i].header = tile.GetHeader();
if (tileData[i].header.polyCount == 0)
{
// Tile not in use.
continue;
}
tileData[i].tileRef = tile.GetTileRef();
IntPtr tdata = new IntPtr();
int tsize = 0;
NavmeshEx.dtnmRemoveTile(mesh.root, tileData[i].tileRef, ref tdata, ref tsize);
tileData[i].data = UtilEx.ExtractArrayByte(tdata, tsize);
NavmeshEx.dtnmFreeBytes(ref tdata);
}
return(NavStatus.Sucess);
}
