125 lines
No EOL
2.7 KiB
C#
125 lines
No EOL
2.7 KiB
C#
using System;
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#if UNITY_EDITOR
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using UnityEditor;
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#endif
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namespace UnityEngine.Tilemaps
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{
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[Serializable]
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public struct WeightedSprite
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{
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public Sprite Sprite;
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public int Weight;
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}
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[Serializable]
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public class WeightedRandomTile : Tile
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{
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[SerializeField] public WeightedSprite[] Sprites;
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public override void GetTileData(Vector3Int location, ITilemap tileMap, ref TileData tileData)
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{
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base.GetTileData(location, tileMap, ref tileData);
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if (Sprites == null || Sprites.Length <= 0)
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{
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return;
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}
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long hash = location.x;
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hash = hash + 0xabcd1234 + (hash << 15);
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hash = (hash + 0x0987efab) ^ (hash >> 11);
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hash ^= location.y;
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hash = hash + 0x46ac12fd + (hash << 7);
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hash = (hash + 0xbe9730af) ^ (hash << 11);
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Random.InitState((int)hash);
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// Get the cumulative weight of the sprites
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var cumulativeWeight = 0;
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foreach (var spriteInfo in Sprites)
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{
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cumulativeWeight += spriteInfo.Weight;
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}
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// Pick a random weight and choose a sprite depending on it
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var randomWeight = Random.Range(0, cumulativeWeight);
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foreach (var spriteInfo in Sprites)
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{
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randomWeight -= spriteInfo.Weight;
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if (randomWeight < 0)
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{
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tileData.sprite = spriteInfo.Sprite;
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break;
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}
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}
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}
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#if UNITY_EDITOR
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[MenuItem("Assets/Create/Weighted Random Tile")]
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public static void CreateRandomTile()
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{
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var path = EditorUtility.SaveFilePanelInProject(
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"Save Weighted Random Tile",
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"New Weighted Random Tile",
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"asset",
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"Save Weighted Random Tile",
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"Assets");
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if (path == "")
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{
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return;
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}
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AssetDatabase.CreateAsset(CreateInstance<WeightedRandomTile>(), path);
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}
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#endif
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}
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#if UNITY_EDITOR
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[CustomEditor(typeof(WeightedRandomTile))]
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public class WeightedRandomTileEditor : Editor
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{
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private WeightedRandomTile Tile => target as WeightedRandomTile;
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public override void OnInspectorGUI()
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{
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EditorGUI.BeginChangeCheck();
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var count = EditorGUILayout.DelayedIntField("Number of Sprites", Tile.Sprites != null ? Tile.Sprites.Length : 0);
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if (count < 0)
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{
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count = 0;
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}
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if (Tile.Sprites == null || Tile.Sprites.Length != count)
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{
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Array.Resize(ref Tile.Sprites, count);
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}
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if (count == 0)
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{
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return;
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}
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EditorGUILayout.LabelField("Place random sprites.");
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EditorGUILayout.Space();
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for (var i = 0; i < count; i++)
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{
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Tile.Sprites[i].Sprite = (Sprite)EditorGUILayout.ObjectField(
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"Sprite " + (i + 1),
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Tile.Sprites[i].Sprite,
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typeof(Sprite),
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false,
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null);
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Tile.Sprites[i].Weight = EditorGUILayout.IntField("Weight " + (i + 1), Tile.Sprites[i].Weight);
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}
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if (EditorGUI.EndChangeCheck())
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{
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EditorUtility.SetDirty(Tile);
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}
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}
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}
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#endif
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} |