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added tiled map collisions

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Ellpeck 2019-09-18 15:54:20 +02:00
parent 5f0585e615
commit 55c9e061f8
1 changed files with 81 additions and 0 deletions
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MLEM.Extended/Tiled/TiledMapCollisions.cs Normal file
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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using Microsoft.Xna.Framework;
using MLEM.Extensions;
using MonoGame.Extended;
using MonoGame.Extended.Tiled;
namespace MLEM.Extended.Tiled {
public class TiledMapCollisions {
private TiledMap map;
private TileCollisionInfo[,,] collisionInfos;
public TiledMapCollisions(TiledMap map = null) {
if (map != null)
this.SetMap(map);
}
public void SetMap(TiledMap map) {
if (this.map == map)
return;
this.map = map;
this.collisionInfos = new TileCollisionInfo[map.Layers.Count, map.Width, map.Height];
for (var i = 0; i < map.TileLayers.Count; i++) {
var layer = map.TileLayers[i];
for (var x = 0; x < map.Width; x++) {
for (var y = 0; y < map.Height; y++) {
var tile = layer.GetTile((ushort) x, (ushort) y);
if (tile.IsBlank)
continue;
var tilesetTile = tile.GetTilesetTile(map);
if (tilesetTile == null)
continue;
this.collisionInfos[i, x, y] = new TileCollisionInfo(map, new Vector2(x, y), tile, tilesetTile);
}
}
}
}
public IEnumerable<TileCollisionInfo> GetCollidingTiles(RectangleF area, Func<TileCollisionInfo, bool> included = null) {
var inclusionFunc = included ?? (tile => tile.Collisions.Any(c => c.Intersects(area)));
for (var i = 0; i < this.map.TileLayers.Count; i++) {
for (var x = area.Left.Floor(); x <= area.Right; x++) {
for (var y = area.Top.Floor(); y <= area.Bottom; y++) {
var tile = this.collisionInfos[i, x, y];
if (tile == null)
continue;
if (inclusionFunc(tile))
yield return tile;
}
}
}
}
public bool IsColliding(RectangleF area, Func<TileCollisionInfo, bool> included = null) {
return this.GetCollidingTiles(area, included).Any();
}
public class TileCollisionInfo {
public readonly TiledMapTile Tile;
public readonly TiledMapTilesetTile TilesetTile;
public readonly ReadOnlyCollection<RectangleF> Collisions;
public TileCollisionInfo(TiledMap map, Vector2 position, TiledMapTile tile, TiledMapTilesetTile tilesetTile) {
this.TilesetTile = tilesetTile;
this.Tile = tile;
var collisions = new List<RectangleF>();
foreach (var obj in tilesetTile.Objects)
collisions.Add(obj.GetArea(map, position));
this.Collisions = collisions.AsReadOnly();
}
}
}
}