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using UnityEngine;
using Pathfinding.Util;
using UnityEngine.Tilemaps;
namespace Pathfinding.Graphs.Navmesh {
/// <summary>
/// Represents the position and size of a tile grid for a recast/navmesh graph.
///
/// This separates out the physical layout of tiles from all the other recast graph settings.
/// </summary>
public struct TileLayout {
/// <summary>How many tiles there are in the grid</summary>
public Int2 tileCount;
/// <summary>Transforms coordinates from graph space to world space</summary>
public GraphTransform transform;
/// <summary>Size of a tile in voxels along the X and Z axes</summary>
public Int2 tileSizeInVoxels;
/// <summary>
/// Size in graph space of the whole grid.
///
/// If the original bounding box was not an exact multiple of the tile size, this will be less than the total width of all tiles.
/// </summary>
public Vector3 graphSpaceSize;
/// <summary>\copydocref{RecastGraph.cellSize}</summary>
public float cellSize;
/// <summary>
/// Voxel y coordinates will be stored as ushorts which have 65536 values.
/// Leave a margin to make sure things do not overflow
/// </summary>
public float CellHeight => Mathf.Max(graphSpaceSize.y / 64000, 0.001f);
/// <summary>Size of a tile in world units, along the graph's X axis</summary>
public float TileWorldSizeX => tileSizeInVoxels.x * cellSize;
/// <summary>Size of a tile in world units, along the graph's Z axis</summary>
public float TileWorldSizeZ => tileSizeInVoxels.y * cellSize;
/// <summary>Returns an XZ bounds object with the bounds of a group of tiles in graph space</summary>
public Bounds GetTileBoundsInGraphSpace (int x, int z, int width = 1, int depth = 1) {
var bounds = new Bounds();
bounds.SetMinMax(new Vector3(x*TileWorldSizeX, 0, z*TileWorldSizeZ),
new Vector3((x+width)*TileWorldSizeX, graphSpaceSize.y, (z+depth)*TileWorldSizeZ)
);
return bounds;
}
/// <summary>
/// Returns a rect containing the indices of all tiles touching the specified bounds.
/// If a margin is passed, the bounding box in graph space is expanded by that amount in every direction.
/// </summary>
public IntRect GetTouchingTiles (Bounds bounds, float margin = 0) {
bounds = transform.InverseTransform(bounds);
// Calculate world bounds of all affected tiles
return new IntRect(Mathf.FloorToInt((bounds.min.x - margin) / TileWorldSizeX), Mathf.FloorToInt((bounds.min.z - margin) / TileWorldSizeZ), Mathf.FloorToInt((bounds.max.x + margin) / TileWorldSizeX), Mathf.FloorToInt((bounds.max.z + margin) / TileWorldSizeZ));
}
public TileLayout(RecastGraph graph) : this(new Bounds(graph.forcedBoundsCenter, graph.forcedBoundsSize), Quaternion.Euler(graph.rotation), graph.cellSize, graph.editorTileSize, graph.useTiles) {
}
public TileLayout(Bounds bounds, Quaternion rotation, float cellSize, int tileSizeInVoxels, bool useTiles) {
this.transform = RecastGraph.CalculateTransform(bounds, rotation);
this.cellSize = cellSize;
// Voxel grid size
var size = bounds.size;
graphSpaceSize = size;
int totalVoxelWidth = (int)(size.x/cellSize + 0.5f);
int totalVoxelDepth = (int)(size.z/cellSize + 0.5f);
if (!useTiles) {
this.tileSizeInVoxels = new Int2(totalVoxelWidth, totalVoxelDepth);
} else {
this.tileSizeInVoxels = new Int2(tileSizeInVoxels, tileSizeInVoxels);
}
// Number of tiles
tileCount = new Int2(
Mathf.Max(0, (totalVoxelWidth + this.tileSizeInVoxels.x-1) / this.tileSizeInVoxels.x),
Mathf.Max(0, (totalVoxelDepth + this.tileSizeInVoxels.y-1) / this.tileSizeInVoxels.y)
);
if (tileCount.x*tileCount.y > NavmeshBase.TileIndexMask + 1) {
throw new System.Exception("Too many tiles ("+(tileCount.x*tileCount.y)+") maximum is "+(NavmeshBase.TileIndexMask + 1)+
"\nTry disabling ASTAR_RECAST_LARGER_TILES under the 'Optimizations' tab in the A* inspector.");
}
}
}
}
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