59b3cd154d
The index value needs only be big enough to handle all defined terrain types. This is a low number so we can save memory by defining it as a byte. This particularly saves memory for the CustomTerrain field in the Map class, which defines a cell layer for the map using tile indexes, so we can reduce the size of that layer 4x as a result.
791 lines
24 KiB
C#
791 lines
24 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Drawing;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using OpenRA.FileSystem;
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using OpenRA.Graphics;
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using OpenRA.Network;
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using OpenRA.Support;
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using OpenRA.Traits;
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namespace OpenRA
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{
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public class MapOptions
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{
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public bool? Cheats;
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public bool? Crates;
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public bool? Fog;
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public bool? Shroud;
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public bool? AllyBuildRadius;
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public bool? FragileAlliances;
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public int? StartingCash;
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public string TechLevel;
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public bool ConfigurableStartingUnits = true;
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public string[] Difficulties = { };
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public void UpdateServerSettings(Session.Global settings)
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{
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if (Cheats.HasValue)
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settings.AllowCheats = Cheats.Value;
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if (Crates.HasValue)
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settings.Crates = Crates.Value;
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if (Fog.HasValue)
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settings.Fog = Fog.Value;
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if (Shroud.HasValue)
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settings.Shroud = Shroud.Value;
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if (AllyBuildRadius.HasValue)
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settings.AllyBuildRadius = AllyBuildRadius.Value;
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if (StartingCash.HasValue)
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settings.StartingCash = StartingCash.Value;
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if (FragileAlliances.HasValue)
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settings.FragileAlliances = FragileAlliances.Value;
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}
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}
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public class Map
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{
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[FieldLoader.Ignore] public IFolder Container;
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public string Path { get; private set; }
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// Yaml map data
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public string Uid { get; private set; }
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public int MapFormat;
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public bool Selectable = true;
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public bool UseAsShellmap;
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public string RequiresMod;
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public string Title;
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public string Type = "Conquest";
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public string Description;
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public string Author;
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public string Tileset;
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public bool AllowStartUnitConfig = true;
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public Bitmap CustomPreview;
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public readonly TileShape TileShape;
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[FieldLoader.Ignore]
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public readonly WVec[] SubCellOffsets;
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public readonly SubCell DefaultSubCell;
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public readonly SubCell LastSubCell;
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public WVec OffsetOfSubCell(SubCell subCell) { return SubCellOffsets[(int)subCell]; }
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[FieldLoader.LoadUsing("LoadOptions")]
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public MapOptions Options;
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static object LoadOptions(MiniYaml y)
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{
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var options = new MapOptions();
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var nodesDict = y.ToDictionary();
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if (nodesDict.ContainsKey("Options"))
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FieldLoader.Load(options, nodesDict["Options"]);
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return options;
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}
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[FieldLoader.Ignore] public Lazy<Dictionary<string, ActorReference>> Actors;
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public int PlayerCount { get { return Players.Count(p => p.Value.Playable); } }
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public Rectangle Bounds;
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// Yaml map data
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[FieldLoader.Ignore] public Dictionary<string, PlayerReference> Players = new Dictionary<string, PlayerReference>();
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[FieldLoader.Ignore] public Lazy<List<SmudgeReference>> Smudges;
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[FieldLoader.Ignore] public List<MiniYamlNode> RuleDefinitions = new List<MiniYamlNode>();
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[FieldLoader.Ignore] public List<MiniYamlNode> SequenceDefinitions = new List<MiniYamlNode>();
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[FieldLoader.Ignore] public List<MiniYamlNode> VoxelSequenceDefinitions = new List<MiniYamlNode>();
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[FieldLoader.Ignore] public List<MiniYamlNode> WeaponDefinitions = new List<MiniYamlNode>();
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[FieldLoader.Ignore] public List<MiniYamlNode> VoiceDefinitions = new List<MiniYamlNode>();
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[FieldLoader.Ignore] public List<MiniYamlNode> NotificationDefinitions = new List<MiniYamlNode>();
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[FieldLoader.Ignore] public List<MiniYamlNode> TranslationDefinitions = new List<MiniYamlNode>();
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// Binary map data
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[FieldLoader.Ignore] public byte TileFormat = 1;
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public int2 MapSize;
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[FieldLoader.Ignore] public Lazy<CellLayer<TerrainTile>> MapTiles;
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[FieldLoader.Ignore] public Lazy<CellLayer<ResourceTile>> MapResources;
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[FieldLoader.Ignore] public CellLayer<byte> CustomTerrain;
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[FieldLoader.Ignore] Lazy<TileSet> cachedTileSet;
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[FieldLoader.Ignore] Lazy<Ruleset> rules;
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public Ruleset Rules { get { return rules != null ? rules.Value : null; } }
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public SequenceProvider SequenceProvider { get { return Rules.Sequences[Tileset]; } }
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[FieldLoader.Ignore] public CellRegion Cells;
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public static Map FromTileset(TileSet tileset)
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{
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var size = new Size(1, 1);
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var tileShape = Game.modData.Manifest.TileShape;
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var tileRef = new TerrainTile(tileset.Templates.First().Key, (byte)0);
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var makeMapTiles = Exts.Lazy(() =>
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{
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var ret = new CellLayer<TerrainTile>(tileShape, size);
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ret.Clear(tileRef);
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return ret;
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});
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var map = new Map()
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{
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Title = "Name your map here",
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Description = "Describe your map here",
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Author = "Your name here",
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MapSize = new int2(size),
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Tileset = tileset.Id,
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Options = new MapOptions(),
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MapResources = Exts.Lazy(() => new CellLayer<ResourceTile>(tileShape, size)),
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MapTiles = makeMapTiles,
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Actors = Exts.Lazy(() => new Dictionary<string, ActorReference>()),
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Smudges = Exts.Lazy(() => new List<SmudgeReference>())
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};
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map.PostInit();
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return map;
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}
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void AssertExists(string filename)
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{
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using (var s = Container.GetContent(filename))
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if (s == null)
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throw new InvalidOperationException("Required file {0} not present in this map".F(filename));
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}
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// Stub constructor that doesn't produce a valid map, but is
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// sufficient for loading a mod to the content-install panel
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public Map() { }
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// The standard constructor for most purposes
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public Map(string path) : this(path, null) { }
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// Support upgrading format 5 maps to a more
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// recent version by defining upgradeForMod.
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public Map(string path, string upgradeForMod)
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{
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Path = path;
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Container = GlobalFileSystem.OpenPackage(path, null, int.MaxValue);
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AssertExists("map.yaml");
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AssertExists("map.bin");
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var yaml = new MiniYaml(null, MiniYaml.FromStream(Container.GetContent("map.yaml")));
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FieldLoader.Load(this, yaml);
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// Support for formats 1-3 dropped 2011-02-11.
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// Use release-20110207 to convert older maps to format 4
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// Use release-20110511 to convert older maps to format 5
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if (MapFormat < 5)
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throw new InvalidDataException("Map format {0} is not supported.\n File: {1}".F(MapFormat, path));
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// Format 5 -> 6 enforces the use of RequiresMod
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if (MapFormat == 5)
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{
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if (upgradeForMod == null)
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throw new InvalidDataException("Map format {0} is not supported, but can be upgraded.\n File: {1}".F(MapFormat, path));
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Console.WriteLine("Upgrading {0} from Format 5 to Format 6", path);
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// TODO: This isn't very nice, but there is no other consistent way
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// of finding the mod early during the engine initialization.
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RequiresMod = upgradeForMod;
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}
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var nd = yaml.ToDictionary();
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// Load players
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foreach (var my in nd["Players"].ToDictionary().Values)
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{
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var player = new PlayerReference(my);
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Players.Add(player.Name, player);
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}
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Actors = Exts.Lazy(() =>
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{
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var ret = new Dictionary<string, ActorReference>();
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foreach (var kv in nd["Actors"].ToDictionary())
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ret.Add(kv.Key, new ActorReference(kv.Value.Value, kv.Value.ToDictionary()));
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return ret;
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});
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// Smudges
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Smudges = Exts.Lazy(() =>
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{
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var ret = new List<SmudgeReference>();
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foreach (var name in nd["Smudges"].ToDictionary().Keys)
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{
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var vals = name.Split(' ');
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var loc = vals[1].Split(',');
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ret.Add(new SmudgeReference(vals[0], new int2(
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Exts.ParseIntegerInvariant(loc[0]),
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Exts.ParseIntegerInvariant(loc[1])),
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Exts.ParseIntegerInvariant(vals[2])));
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}
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return ret;
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});
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RuleDefinitions = MiniYaml.NodesOrEmpty(yaml, "Rules");
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SequenceDefinitions = MiniYaml.NodesOrEmpty(yaml, "Sequences");
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VoxelSequenceDefinitions = MiniYaml.NodesOrEmpty(yaml, "VoxelSequences");
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WeaponDefinitions = MiniYaml.NodesOrEmpty(yaml, "Weapons");
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VoiceDefinitions = MiniYaml.NodesOrEmpty(yaml, "Voices");
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NotificationDefinitions = MiniYaml.NodesOrEmpty(yaml, "Notifications");
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TranslationDefinitions = MiniYaml.NodesOrEmpty(yaml, "Translations");
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MapTiles = Exts.Lazy(() => LoadMapTiles());
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MapResources = Exts.Lazy(() => LoadResourceTiles());
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TileShape = Game.modData.Manifest.TileShape;
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SubCellOffsets = Game.modData.Manifest.SubCellOffsets;
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LastSubCell = (SubCell)(SubCellOffsets.Length - 1);
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DefaultSubCell = (SubCell)Game.modData.Manifest.SubCellDefaultIndex;
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// The Uid is calculated from the data on-disk, so
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// format changes must be flushed to disk.
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// TODO: this isn't very nice
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if (MapFormat < 6)
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Save(path);
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Uid = ComputeHash();
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if (Container.Exists("map.png"))
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using (var dataStream = Container.GetContent("map.png"))
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CustomPreview = new Bitmap(dataStream);
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PostInit();
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}
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void PostInit()
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{
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rules = Exts.Lazy(() => Game.modData.RulesetCache.LoadMapRules(this));
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cachedTileSet = Exts.Lazy(() => Rules.TileSets[Tileset]);
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var tl = Map.MapToCell(TileShape, new CPos(Bounds.Left, Bounds.Top));
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var br = Map.MapToCell(TileShape, new CPos(Bounds.Right - 1, Bounds.Bottom - 1));
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Cells = new CellRegion(TileShape, tl, br);
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CustomTerrain = new CellLayer<byte>(this);
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foreach (var cell in Cells)
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CustomTerrain[cell] = byte.MaxValue;
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}
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public Ruleset PreloadRules()
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{
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return rules.Value;
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}
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public CPos[] GetSpawnPoints()
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{
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return Actors.Value.Values
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.Where(a => a.Type == "mpspawn")
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.Select(a => (CPos)a.InitDict.Get<LocationInit>().value)
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.ToArray();
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}
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public void Save(string toPath)
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{
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MapFormat = 6;
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var root = new List<MiniYamlNode>();
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var fields = new[]
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{
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"Selectable",
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"MapFormat",
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"RequiresMod",
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"Title",
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"Description",
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"Author",
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"Tileset",
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"MapSize",
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"Bounds",
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"UseAsShellmap",
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"Type",
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};
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foreach (var field in fields)
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{
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var f = this.GetType().GetField(field);
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if (f.GetValue(this) == null)
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continue;
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root.Add(new MiniYamlNode(field, FieldSaver.FormatValue(this, f)));
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}
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root.Add(new MiniYamlNode("Options", FieldSaver.SaveDifferences(Options, new MapOptions())));
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root.Add(new MiniYamlNode("Players", null,
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Players.Select(p => new MiniYamlNode("PlayerReference@{0}".F(p.Key), FieldSaver.SaveDifferences(p.Value, new PlayerReference()))).ToList())
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);
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root.Add(new MiniYamlNode("Actors", null,
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Actors.Value.Select(x => new MiniYamlNode(x.Key, x.Value.Save())).ToList())
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);
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root.Add(new MiniYamlNode("Smudges", MiniYaml.FromList<SmudgeReference>(Smudges.Value)));
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root.Add(new MiniYamlNode("Rules", null, RuleDefinitions));
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root.Add(new MiniYamlNode("Sequences", null, SequenceDefinitions));
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root.Add(new MiniYamlNode("VoxelSequences", null, VoxelSequenceDefinitions));
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root.Add(new MiniYamlNode("Weapons", null, WeaponDefinitions));
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root.Add(new MiniYamlNode("Voices", null, VoiceDefinitions));
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root.Add(new MiniYamlNode("Notifications", null, NotificationDefinitions));
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root.Add(new MiniYamlNode("Translations", null, TranslationDefinitions));
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var entries = new Dictionary<string, byte[]>();
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entries.Add("map.bin", SaveBinaryData());
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var s = root.WriteToString();
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entries.Add("map.yaml", Encoding.UTF8.GetBytes(s));
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// Add any custom assets
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if (Container != null)
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{
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foreach (var file in Container.AllFileNames())
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{
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if (file == "map.bin" || file == "map.yaml")
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continue;
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entries.Add(file, Container.GetContent(file).ReadAllBytes());
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}
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}
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// Saving the map to a new location
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if (toPath != Path)
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{
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Path = toPath;
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// Create a new map package
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Container = GlobalFileSystem.CreatePackage(Path, int.MaxValue, entries);
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}
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// Update existing package
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Container.Write(entries);
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}
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public CellLayer<TerrainTile> LoadMapTiles()
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{
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var tiles = new CellLayer<TerrainTile>(this);
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using (var dataStream = Container.GetContent("map.bin"))
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{
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if (dataStream.ReadUInt8() != 1)
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throw new InvalidDataException("Unknown binary map format");
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// Load header info
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var width = dataStream.ReadUInt16();
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var height = dataStream.ReadUInt16();
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if (width != MapSize.X || height != MapSize.Y)
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throw new InvalidDataException("Invalid tile data");
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// Load tile data
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var data = dataStream.ReadBytes(MapSize.X * MapSize.Y * 3);
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var d = 0;
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for (var i = 0; i < MapSize.X; i++)
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{
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for (var j = 0; j < MapSize.Y; j++)
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{
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var tile = BitConverter.ToUInt16(data, d);
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d += 2;
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var index = data[d++];
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if (index == byte.MaxValue)
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index = (byte)(i % 4 + (j % 4) * 4);
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tiles[i, j] = new TerrainTile(tile, index);
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}
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}
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}
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return tiles;
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}
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public CellLayer<ResourceTile> LoadResourceTiles()
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{
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var resources = new CellLayer<ResourceTile>(this);
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using (var dataStream = Container.GetContent("map.bin"))
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{
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if (dataStream.ReadUInt8() != 1)
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throw new InvalidDataException("Unknown binary map format");
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// Load header info
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var width = dataStream.ReadUInt16();
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var height = dataStream.ReadUInt16();
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if (width != MapSize.X || height != MapSize.Y)
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throw new InvalidDataException("Invalid tile data");
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// Skip past tile data
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dataStream.Seek(3 * MapSize.X * MapSize.Y, SeekOrigin.Current);
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var data = dataStream.ReadBytes(MapSize.X * MapSize.Y * 2);
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var d = 0;
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// Load resource data
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for (var i = 0; i < MapSize.X; i++)
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for (var j = 0; j < MapSize.Y; j++)
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resources[i, j] = new ResourceTile(data[d++], data[d++]);
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}
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return resources;
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}
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public byte[] SaveBinaryData()
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{
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var dataStream = new MemoryStream();
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using (var writer = new BinaryWriter(dataStream))
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{
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// File header consists of a version byte, followed by 2 ushorts for width and height
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writer.Write(TileFormat);
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writer.Write((ushort)MapSize.X);
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writer.Write((ushort)MapSize.Y);
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// Tile data
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for (var i = 0; i < MapSize.X; i++)
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for (var j = 0; j < MapSize.Y; j++)
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{
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var tile = MapTiles.Value[i, j];
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writer.Write(tile.Type);
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writer.Write(tile.Index);
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}
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// Resource data
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for (var i = 0; i < MapSize.X; i++)
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{
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for (var j = 0; j < MapSize.Y; j++)
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{
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var tile = MapResources.Value[i, j];
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writer.Write(tile.Type);
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writer.Write(tile.Index);
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}
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}
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}
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return dataStream.ToArray();
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}
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public bool Contains(CPos cell)
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{
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var uv = CellToMap(TileShape, cell);
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return Bounds.Contains(uv.X, uv.Y);
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}
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public WPos CenterOfCell(CPos cell)
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{
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if (TileShape == TileShape.Rectangle)
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return new WPos(1024 * cell.X + 512, 1024 * cell.Y + 512, 0);
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// Convert from diamond cell position (x, y) to world position (u, v):
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// (a) Consider the relationships:
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// - Center of origin cell is (512, 512)
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// - +x adds (512, 512) to world pos
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// - +y adds (-512, 512) to world pos
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// (b) Therefore:
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// - ax + by adds (a - b) * 512 + 512 to u
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// - ax + by adds (a + b) * 512 + 512 to v
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return new WPos(512 * (cell.X - cell.Y + 1), 512 * (cell.X + cell.Y + 1), 0);
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}
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public WPos CenterOfSubCell(CPos cell, SubCell subCell)
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{
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var index = (int)subCell;
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if (index >= 0 && index <= SubCellOffsets.Length)
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return CenterOfCell(cell) + SubCellOffsets[index];
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return CenterOfCell(cell);
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}
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public CPos CellContaining(WPos pos)
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{
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if (TileShape == TileShape.Rectangle)
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return new CPos(pos.X / 1024, pos.Y / 1024);
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|
|
// Convert from world position to diamond cell position:
|
|
// (a) Subtract (512, 512) to move the rotation center to the middle of the corner cell
|
|
// (b) Rotate axes by -pi/4
|
|
// (c) Add 512 to x (but not y) to realign the cell
|
|
// (d) Divide by 1024 to find final cell coords
|
|
var u = (pos.Y + pos.X - 512) / 1024;
|
|
var v = (pos.Y - pos.X) / 1024;
|
|
return new CPos(u, v);
|
|
}
|
|
|
|
public static CPos MapToCell(TileShape shape, CPos map)
|
|
{
|
|
if (shape == TileShape.Rectangle)
|
|
return map;
|
|
|
|
// Convert from rectangular map position to diamond cell position
|
|
// - The staggered rows make this fiddly (hint: draw a diagram!)
|
|
// (a) Consider the relationships:
|
|
// - +1u (even -> odd) adds (1, -1) to (x, y)
|
|
// - +1v (even -> odd) adds (1, 0) to (x, y)
|
|
// - +1v (odd -> even) adds (0, 1) to (x, y)
|
|
// (b) Therefore:
|
|
// - au + 2bv adds (a + b) to (x, y)
|
|
// - a correction factor is added if v is odd
|
|
var offset = (map.Y & 1) == 1 ? 1 : 0;
|
|
var y = (map.Y - offset) / 2 - map.X;
|
|
var x = map.Y - y;
|
|
return new CPos(x, y);
|
|
}
|
|
|
|
public static CPos CellToMap(TileShape shape, CPos cell)
|
|
{
|
|
if (shape == TileShape.Rectangle)
|
|
return cell;
|
|
|
|
// Convert from diamond cell (x, y) position to rectangular map position (u, v)
|
|
// - The staggered rows make this fiddly (hint: draw a diagram!)
|
|
// (a) Consider the relationships:
|
|
// - +1x (even -> odd) adds (0, 1) to (u, v)
|
|
// - +1x (odd -> even) adds (1, 1) to (u, v)
|
|
// - +1y (even -> odd) adds (-1, 1) to (u, v)
|
|
// - +1y (odd -> even) adds (0, 1) to (u, v)
|
|
// (b) Therefore:
|
|
// - ax + by adds (a - b)/2 to u (only even increments count)
|
|
// - ax + by adds a + b to v
|
|
var u = (cell.X - cell.Y) / 2;
|
|
var v = cell.X + cell.Y;
|
|
return new CPos(u, v);
|
|
}
|
|
|
|
public int FacingBetween(CPos cell, CPos towards, int fallbackfacing)
|
|
{
|
|
return Traits.Util.GetFacing(CenterOfCell(towards) - CenterOfCell(cell), fallbackfacing);
|
|
}
|
|
|
|
public void Resize(int width, int height) // editor magic.
|
|
{
|
|
var oldMapTiles = MapTiles.Value;
|
|
var oldMapResources = MapResources.Value;
|
|
var newSize = new Size(width, height);
|
|
|
|
MapTiles = Exts.Lazy(() => CellLayer.Resize(oldMapTiles, newSize, oldMapTiles[0, 0]));
|
|
MapResources = Exts.Lazy(() => CellLayer.Resize(oldMapResources, newSize, oldMapResources[0, 0]));
|
|
MapSize = new int2(newSize);
|
|
}
|
|
|
|
public void ResizeCordon(int left, int top, int right, int bottom)
|
|
{
|
|
Bounds = Rectangle.FromLTRB(left, top, right, bottom);
|
|
|
|
var tl = Map.MapToCell(TileShape, new CPos(Bounds.Left, Bounds.Top));
|
|
var br = Map.MapToCell(TileShape, new CPos(Bounds.Right - 1, Bounds.Bottom - 1));
|
|
Cells = new CellRegion(TileShape, tl, br);
|
|
}
|
|
|
|
string ComputeHash()
|
|
{
|
|
// UID is calculated by taking an SHA1 of the yaml and binary data
|
|
|
|
using (var ms = new MemoryStream())
|
|
{
|
|
// Read the relevant data into the buffer
|
|
using (var s = Container.GetContent("map.yaml"))
|
|
s.CopyTo(ms);
|
|
using (var s = Container.GetContent("map.bin"))
|
|
s.CopyTo(ms);
|
|
|
|
// Take the SHA1
|
|
ms.Seek(0, SeekOrigin.Begin);
|
|
using (var csp = SHA1.Create())
|
|
return new string(csp.ComputeHash(ms).SelectMany(a => a.ToString("x2")).ToArray());
|
|
}
|
|
}
|
|
|
|
public void MakeDefaultPlayers()
|
|
{
|
|
var firstRace = Rules.Actors["world"].Traits
|
|
.WithInterface<CountryInfo>().First(c => c.Selectable).Race;
|
|
|
|
if (!Players.ContainsKey("Neutral"))
|
|
Players.Add("Neutral", new PlayerReference
|
|
{
|
|
Name = "Neutral",
|
|
Race = firstRace,
|
|
OwnsWorld = true,
|
|
NonCombatant = true
|
|
});
|
|
|
|
var numSpawns = GetSpawnPoints().Length;
|
|
for (var index = 0; index < numSpawns; index++)
|
|
{
|
|
if (Players.ContainsKey("Multi{0}".F(index)))
|
|
continue;
|
|
|
|
var p = new PlayerReference
|
|
{
|
|
Name = "Multi{0}".F(index),
|
|
Race = "Random",
|
|
Playable = true,
|
|
Enemies = new[] { "Creeps" }
|
|
};
|
|
Players.Add(p.Name, p);
|
|
}
|
|
|
|
Players.Add("Creeps", new PlayerReference
|
|
{
|
|
Name = "Creeps",
|
|
Race = firstRace,
|
|
NonCombatant = true,
|
|
Enemies = Players.Where(p => p.Value.Playable).Select(p => p.Key).ToArray()
|
|
});
|
|
}
|
|
|
|
public void FixOpenAreas(Ruleset rules)
|
|
{
|
|
var r = new Random();
|
|
var tileset = rules.TileSets[Tileset];
|
|
|
|
for (var j = Bounds.Top; j < Bounds.Bottom; j++)
|
|
{
|
|
for (var i = Bounds.Left; i < Bounds.Right; i++)
|
|
{
|
|
var type = MapTiles.Value[i, j].Type;
|
|
var index = MapTiles.Value[i, j].Index;
|
|
if (!tileset.Templates.ContainsKey(type))
|
|
{
|
|
Console.WriteLine("Unknown Tile ID {0}".F(type));
|
|
continue;
|
|
}
|
|
|
|
var template = tileset.Templates[type];
|
|
if (!template.PickAny)
|
|
continue;
|
|
|
|
index = (byte)r.Next(0, template.TilesCount);
|
|
MapTiles.Value[i, j] = new TerrainTile(type, index);
|
|
}
|
|
}
|
|
}
|
|
|
|
public byte GetTerrainIndex(CPos cell)
|
|
{
|
|
var custom = CustomTerrain[cell];
|
|
return custom != byte.MaxValue ? custom : cachedTileSet.Value.GetTerrainIndex(MapTiles.Value[cell]);
|
|
}
|
|
|
|
public TerrainTypeInfo GetTerrainInfo(CPos cell)
|
|
{
|
|
return cachedTileSet.Value[GetTerrainIndex(cell)];
|
|
}
|
|
|
|
public CPos Clamp(CPos cell)
|
|
{
|
|
var bounds = new Rectangle(Bounds.X, Bounds.Y, Bounds.Width - 1, Bounds.Height - 1);
|
|
return MapToCell(TileShape, CellToMap(TileShape, cell).Clamp(bounds));
|
|
}
|
|
|
|
public CPos ChooseRandomCell(MersenneTwister rand)
|
|
{
|
|
var x = rand.Next(Bounds.Left, Bounds.Right);
|
|
var y = rand.Next(Bounds.Top, Bounds.Bottom);
|
|
|
|
return MapToCell(TileShape, new CPos(x, y));
|
|
}
|
|
|
|
public CPos ChooseRandomEdgeCell(MersenneTwister rand)
|
|
{
|
|
var isX = rand.Next(2) == 0;
|
|
var edge = rand.Next(2) == 0;
|
|
|
|
var x = isX ? rand.Next(Bounds.Left, Bounds.Right) : (edge ? Bounds.Left : Bounds.Right);
|
|
var y = !isX ? rand.Next(Bounds.Top, Bounds.Bottom) : (edge ? Bounds.Top : Bounds.Bottom);
|
|
|
|
return MapToCell(TileShape, new CPos(x, y));
|
|
}
|
|
|
|
public WRange DistanceToEdge(WPos pos, WVec dir)
|
|
{
|
|
var tl = CenterOfCell(Cells.TopLeft) - new WVec(512, 512, 0);
|
|
var br = CenterOfCell(Cells.BottomRight) + new WVec(511, 511, 0);
|
|
var x = dir.X == 0 ? int.MaxValue : ((dir.X < 0 ? tl.X : br.X) - pos.X) / dir.X;
|
|
var y = dir.Y == 0 ? int.MaxValue : ((dir.Y < 0 ? tl.Y : br.Y) - pos.Y) / dir.Y;
|
|
return new WRange(Math.Min(x, y) * dir.Length);
|
|
}
|
|
|
|
public const int MaxTilesInCircleRange = 50;
|
|
static CVec[][] TilesByDistance = InitTilesByDistance(MaxTilesInCircleRange);
|
|
|
|
static CVec[][] InitTilesByDistance(int max)
|
|
{
|
|
var ts = new List<CVec>[max + 1];
|
|
for (var i = 0; i < max + 1; i++)
|
|
ts [i] = new List<CVec>();
|
|
|
|
for (var j = -max; j <= max; j++)
|
|
for (var i = -max; i <= max; i++)
|
|
if (max * max >= i * i + j * j)
|
|
ts[Exts.ISqrt(i * i + j * j, Exts.ISqrtRoundMode.Ceiling)].Add(new CVec(i, j));
|
|
|
|
// Sort each integer-distance group by the actual distance
|
|
foreach (var list in ts)
|
|
{
|
|
list.Sort((a, b) =>
|
|
{
|
|
var result = a.LengthSquared.CompareTo(b.LengthSquared);
|
|
if (result != 0)
|
|
return result;
|
|
|
|
// If the lengths are equal, use other means to sort them.
|
|
// Try the hashcode first because it gives more
|
|
// random-appearing results than X or Y that would always
|
|
// prefer the leftmost/topmost position.
|
|
result = a.GetHashCode().CompareTo(b.GetHashCode());
|
|
if (result != 0)
|
|
return result;
|
|
|
|
result = a.X.CompareTo(b.X);
|
|
if (result != 0)
|
|
return result;
|
|
|
|
return a.Y.CompareTo(b.Y);
|
|
});
|
|
}
|
|
|
|
return ts.Select(list => list.ToArray()).ToArray();
|
|
}
|
|
|
|
// Both ranges are inclusive because everything that calls it is designed for maxRange being inclusive:
|
|
// it rounds the actual distance up to the next integer so that this call
|
|
// will return any cells that intersect with the requested range circle.
|
|
// The returned positions are sorted by distance from the center.
|
|
public IEnumerable<CPos> FindTilesInAnnulus(CPos center, int minRange, int maxRange)
|
|
{
|
|
if (maxRange < minRange)
|
|
throw new ArgumentOutOfRangeException("maxRange", "Maximum range is less than the minimum range.");
|
|
|
|
if (maxRange > TilesByDistance.Length)
|
|
throw new ArgumentOutOfRangeException("maxRange", "The requested range ({0}) exceeds the maximum allowed ({1})".F(maxRange, MaxTilesInCircleRange));
|
|
|
|
for (var i = minRange; i <= maxRange; i++)
|
|
{
|
|
foreach (var offset in TilesByDistance[i])
|
|
{
|
|
var t = offset + center;
|
|
if (Contains(t))
|
|
yield return t;
|
|
}
|
|
}
|
|
}
|
|
|
|
public IEnumerable<CPos> FindTilesInCircle(CPos center, int maxRange)
|
|
{
|
|
return FindTilesInAnnulus(center, 0, maxRange);
|
|
}
|
|
}
|
|
}
|