/// <summary>
/// 可跨多块地形的细节修改
/// </summary>
/// <param name="terrain"></param>
/// <param name="center"></param>
/// <param name="radius"></param>
/// <param name="layer"></param>
/// <param name="count"></param>
private void InternalSetDetail(Vector3 center, float radius, int layer, int count, bool regesterUndo)
{
Vector3 leftDown = new Vector3(center.x - radius, 0, center.z - radius);
Terrain terrain = Utility.SendRayDown(leftDown, LayerMask.GetMask("Terrain")).collider?.GetComponent <Terrain>();
if (terrain != null)
{
// 获取数据
TerrainData terrainData = terrain.terrainData;
int mapRadius = (int)(radius / terrainData.size.x * terrainData.detailResolution);
Vector2Int mapIndex = TerrainUtility.GetDetialMapIndex(terrain, leftDown);
int[,] detailMap = TerrainUtility.GetDetailLayer(terrain, mapIndex.x, mapIndex.y, 2 * mapRadius, 2 * mapRadius, layer);
if (regesterUndo)
{
DetialCmdData detialCmdData = new DetialCmdData(terrain, mapIndex, layer, detailMap);
RegisterUndo(new DetialCmd(detialCmdData));
}
// 修改数据
ChangeDetailMap(detailMap, count);
// 设置数据
TerrainUtility.SetDetailLayer(terrain, detailMap, mapIndex.x, mapIndex.y, layer);
}
}
public void Undo(RuntimeTerrainEditor t)
{
TerrainUtility.SetDetailLayer(cmd.terrain, cmd.detailMap, cmd.startMapIndex.x, cmd.startMapIndex.y, cmd.layer);
}