Leonid Pershin
b3415120c3
CI / build-test (push) Failing after 1m4s
TileSet maps ids to texture regions with tints (0 = empty), TileGrid is a bounds-checked dense ushort grid, and the Tilemap component places a grid in the world per render layer. UseTilemaps() inserts TilemapRenderSystem before the flush; it submits only the camera-visible cell range (TilemapMath.VisibleCells), so frame cost scales with the screen, not the grid. Demonstrated in the sample as a checkerboard floor; Tiled loading stays on the roadmap on top of this API.
45 lines
1.6 KiB
C#
45 lines
1.6 KiB
C#
using Microsoft.Xna.Framework;
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using MrGameEng.Graphics;
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namespace MrGameEng.Tilemaps;
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/// <summary>One tile kind: a texture region plus a tint multiplier.</summary>
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/// <param name="Region">Texture region the tile is drawn with.</param>
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/// <param name="Color">Tint, multiplied with the texture. White = unmodified.</param>
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public readonly record struct TileDef(Texture2DRegion Region, Color Color)
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{
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/// <summary>Creates an untinted tile.</summary>
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public TileDef(Texture2DRegion region)
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: this(region, Color.White)
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{
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}
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}
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/// <summary>
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/// Maps tile ids to <see cref="TileDef"/>s. Built in code: every <see cref="Add"/> returns
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/// the id to store in a <see cref="TileGrid"/>. Id 0 is reserved for "empty" (nothing drawn).
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/// </summary>
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public sealed class TileSet
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{
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private readonly List<TileDef> _tiles = [default];
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/// <summary>Number of defined tiles including the reserved empty tile 0.</summary>
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public int Count => _tiles.Count;
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/// <summary>The tile definition for <paramref name="id"/>. Id 0 has no region.</summary>
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public TileDef this[int id] => _tiles[id];
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/// <summary>Defines a tile and returns its id (1, 2, …).</summary>
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public ushort Add(Texture2DRegion region, Color? color = null)
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{
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ArgumentNullException.ThrowIfNull(region);
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if (_tiles.Count > ushort.MaxValue)
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{
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throw new InvalidOperationException("A TileSet holds at most 65535 tiles.");
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}
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_tiles.Add(new TileDef(region, color ?? Color.White));
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return (ushort)(_tiles.Count - 1);
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}
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}
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