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Packages/com.arongranberg.astar/Graphs/Navmesh/NavmeshTile.cs

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+namespace Pathfinding.Graphs.Navmesh {
+	using Pathfinding.Util;
+	using Pathfinding.Collections;
+	using Unity.Collections;
+
+	/// <summary>
+	/// A single tile in a recast or navmesh graph.
+	///
+	/// A tile is a single rectangular (but usually square) part of the graph.
+	/// Tiles can be updated individually, which is great for large worlds where updating the whole graph would take a long time.
+	/// </summary>
+	public class NavmeshTile : INavmeshHolder {
+		/// <summary>
+		/// All vertices in the tile.
+		/// The vertices are in graph space.
+		///
+		/// This represents an allocation using the Persistent allocator.
+		/// </summary>
+		public UnsafeSpan<Int3> vertsInGraphSpace;
+		/// <summary>
+		/// All vertices in the tile.
+		/// The vertices are in world space.
+		///
+		/// This represents an allocation using the Persistent allocator.
+		/// </summary>
+		public UnsafeSpan<Int3> verts;
+		/// <summary>
+		/// All triangle indices in the tile.
+		/// One triangle is 3 indices.
+		/// The triangles are in the same order as the <see cref="nodes"/>.
+		///
+		/// This represents an allocation using the Persistent allocator.
+		/// </summary>
+		public UnsafeSpan<int> tris;
+
+		/// <summary>
+		/// True if this tile may have been cut by <see cref="NavmeshCut"/>s, or had pieces added by <see cref="NavmeshAdd"/> components.
+		///
+		/// If true, the <see cref="preCutVertsInTileSpace"/>, <see cref="preCutTris"/> and <see cref="preCutTags"/> fields will be valid.
+		/// </summary>
+		public bool isCut;
+		public UnsafeSpan<Int3> preCutVertsInTileSpace;
+		public UnsafeSpan<int> preCutTris;
+		public UnsafeSpan<uint> preCutTags;
+
+
+		/// <summary>Tile X Coordinate</summary>
+		public int x;
+
+		/// <summary>Tile Z Coordinate</summary>
+		public int z;
+
+		/// <summary>
+		/// Width, in tile coordinates.
+		/// Warning: Widths other than 1 are not supported. This is mainly here for possible future features.
+		/// </summary>
+		public int w;
+
+		/// <summary>
+		/// Depth, in tile coordinates.
+		/// Warning: Depths other than 1 are not supported. This is mainly here for possible future features.
+		/// </summary>
+		public int d;
+
+		/// <summary>All nodes in the tile</summary>
+		public TriangleMeshNode[] nodes;
+
+		/// <summary>Bounding Box Tree for node lookups</summary>
+		public BBTree bbTree;
+
+		/// <summary>Temporary flag used for batching</summary>
+		public bool flag;
+
+		/// <summary>The graph which contains this tile</summary>
+		public NavmeshBase graph;
+
+		#region INavmeshHolder implementation
+
+		public void GetTileCoordinates (int tileIndex, out int x, out int z) {
+			x = this.x;
+			z = this.z;
+		}
+
+		public int GetVertexArrayIndex (int index) {
+			return index & NavmeshBase.VertexIndexMask;
+		}
+
+		/// <summary>Get a specific vertex in the tile</summary>
+		public Int3 GetVertex (int index) {
+			int idx = index & NavmeshBase.VertexIndexMask;
+
+			return verts[idx];
+		}
+
+		public Int3 GetVertexInGraphSpace (int index) {
+			return vertsInGraphSpace[index & NavmeshBase.VertexIndexMask];
+		}
+
+		/// <summary>Transforms coordinates from graph space to world space</summary>
+		public GraphTransform transform { get { return graph.transform; } }
+
+		#endregion
+
+		public void GetNodes (System.Action<GraphNode> action) {
+			if (nodes == null) return;
+			for (int i = 0; i < nodes.Length; i++) action(nodes[i]);
+		}
+
+		public void Dispose () {
+			unsafe {
+				bbTree.Dispose();
+				vertsInGraphSpace.Free(Allocator.Persistent);
+				verts.Free(Allocator.Persistent);
+				tris.Free(Allocator.Persistent);
+				preCutTags.Free(Allocator.Persistent);
+				preCutVertsInTileSpace.Free(Allocator.Persistent);
+				preCutTris.Free(Allocator.Persistent);
+				// Ensure Dispose is idempotent
+				vertsInGraphSpace = default;
+				verts = default;
+				tris = default;
+				preCutTags = default;
+				preCutVertsInTileSpace = default;
+				preCutTris = default;
+				isCut = false;
+			}
+		}
+	}
+}