76 lines
3.0 KiB
C#
76 lines
3.0 KiB
C#
using UnityEngine;
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namespace AibisDream
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{
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public static class BlockPuzzleGridEx
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{
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public static SnapResult TrySnapToGrid(this IBlockPuzzleGrid grid, BlockShape shape)
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{
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// 预制错误结果作为返回值
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SnapResult result = new SnapResult
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{
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canSnap = false,
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snapPosition = shape.transform.position,
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gridX = 0,
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gridY = 0,
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distance = float.MaxValue
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};
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// 将Shape的世界坐标转换为网格坐标（可以是虚拟坐标）
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bool inGrid = grid.WorldToGrid(shape.transform.position, out int gridX, out int gridY);
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if (!inGrid) return result;
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// 将形状的所有格子转换为网格坐标
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// gridX, gridY 是形状的 (0, 0) 点在网格中的位置
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Vector2Int[] gridCells = ConvertShapeToGridCells(shape, gridX, gridY);
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result.gridX = gridX;
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result.gridY = gridY;
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result.snapPosition = grid.GridToWorld(gridX, gridY);
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// 逐个坐标验证是否可以放置
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var canPlace = grid.CanPlace(gridCells, out bool[] results);
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if (!canPlace) return result;
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result.canSnap = true;
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result.distance = Vector3.Distance(shape.transform.position, result.snapPosition);
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return result;
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}
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/// <summary>
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/// 将形状的相对坐标转换为网格坐标
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/// 已知形状的 (0, 0) 点在网格中的位置为 (gridX, gridY)，将形状的其他格子坐标转换为网格坐标
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/// </summary>
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/// <param name="shape">形状</param>
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/// <param name="gridX">网格X坐标（形状左下角位置，即形状的 (0, 0) 点对应的网格坐标）</param>
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/// <param name="gridY">网格Y坐标（形状左下角位置，即形状的 (0, 0) 点对应的网格坐标）</param>
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/// <returns>形状所有格子在网格中的坐标数组</returns>
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public static Vector2Int[] ConvertShapeToGridCells(IBlockShape shape, int gridX, int gridY)
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{
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if (shape == null)
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{
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return new Vector2Int[0];
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}
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Vector2Int[] blockPositions = shape.GetBlockPositions();
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if (blockPositions == null || blockPositions.Length == 0)
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{
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return new Vector2Int[0];
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}
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Vector2Int[] gridCells = new Vector2Int[blockPositions.Length];
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for (int i = 0; i < blockPositions.Length; i++)
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{
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// 将形状的相对坐标转换为网格坐标
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// 形状的 (0, 0) 对应网格的 (gridX, gridY)
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// 形状的 (blockPos.x, blockPos.y) 对应网格的 (gridX + blockPos.x, gridY + blockPos.y)
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gridCells[i] = new Vector2Int(
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gridX + blockPositions[i].x,
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gridY + blockPositions[i].y
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);
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}
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return gridCells;
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}
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}
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} |