如何在Bukkit mod中使用Minecraft的WorldEdit撤销堆栈

Question

我试图在Bukkit mod中更新Minecraft中的块,并能够//undo在Minecraft中进行那些更改.我可以改变块但我无法//undo改变.

我一定错过了一些简单的东西,因为谷歌没有帮我找到解决方案.

这是我的mod.它将当前所选区域中的单个块设置为空中.注释掉的行是我尝试过的对我不起作用的东西.

public class Main extends JavaPlugin implements Listener
{
    // ... //

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) 
    {
        if (command.getName().equalsIgnoreCase("setair")) 
        {           
            org.bukkit.entity.Player bukkitPlayer = (org.bukkit.entity.Player) sender;  

            WorldEditPlugin worldEditPlugin = null;
            worldEditPlugin = (WorldEditPlugin) Bukkit.getServer().getPluginManager().getPlugin("WorldEdit");
            if(worldEditPlugin == null){
                bukkitPlayer.sendMessage("Error: WorldEdit is null.");   
            }
            else
            {               
                com.sk89q.worldedit.bukkit.selections.Selection s = worldEditPlugin.getSelection(bukkitPlayer);
                com.sk89q.worldedit.LocalSession localSession = worldEditPlugin.getSession(bukkitPlayer);
                com.sk89q.worldedit.world.World localWorld = localSession.getSelectionWorld();
                com.sk89q.worldedit.bukkit.BukkitPlayer wrappedPlayer = worldEditPlugin.wrapPlayer(bukkitPlayer);
                com.sk89q.worldedit.LocalPlayer localPlayer = wrappedPlayer;
                //com.sk89q.worldedit.world.World localWorld2 = localPlayer.getWorld();

                com.sk89q.worldedit.EditSession editSession = worldEditPlugin.getWorldEdit().getEditSessionFactory().getEditSession(localWorld, -1, localPlayer);
                //com.sk89q.worldedit.EditSession editSession = worldEditPlugin.createEditSession(bukkitPlayer);

                //localSession.remember(editSession);

                Vector minV = s.getNativeMinimumPoint();
                try {
                    editSession.setBlock(minV, new com.sk89q.worldedit.blocks.BaseBlock(0,0));
                } catch (MaxChangedBlocksException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                //try {
                //  localWorld.setBlock(minV, new com.sk89q.worldedit.blocks.BaseBlock(0,0));
                //} catch (WorldEditException e) {
                    // TODO Auto-generated catch block
                //  e.printStackTrace();
                //}


                localSession.getRegionSelector(localWorld).learnChanges();
                localSession.getRegionSelector(localWorld).explainRegionAdjust(localPlayer, localSession);

                bukkitPlayer.performCommand("tellraw @p \"Done setair\"");
            }

            return true;
        }
    }
}

---

编辑:这是有效的.感谢sorifiend以下答案.为了使它工作,我还必须localSession.remember(editSession)在setBlock调用之后移动.

@Override
public boolean onCommand(CommandSender sender, Command command, String label, String[] args) 
{
    if (command.getName().equalsIgnoreCase("setair")) 
    {           
        org.bukkit.entity.Player bukkitPlayer = (org.bukkit.entity.Player) sender;  

        WorldEditPlugin worldEditPlugin = null;
        worldEditPlugin = (WorldEditPlugin) Bukkit.getServer().getPluginManager().getPlugin("WorldEdit");
        if(worldEditPlugin == null){
            bukkitPlayer.sendMessage("Error: WorldEdit is null.");   
        }
        else
        {               
            com.sk89q.worldedit.bukkit.selections.Selection s = worldEditPlugin.getSelection(bukkitPlayer);
            com.sk89q.worldedit.LocalSession localSession = worldEditPlugin.getSession(bukkitPlayer);

            com.sk89q.worldedit.EditSession editSession = worldEditPlugin.createEditSession(bukkitPlayer);

            Vector minV = s.getNativeMinimumPoint();
            try {
                editSession.setBlock(minV, new com.sk89q.worldedit.blocks.BaseBlock(0,0));
            } catch (MaxChangedBlocksException e) {
                e.printStackTrace();
            }

            localSession.remember(editSession);

            bukkitPlayer.performCommand("tellraw @p \"Done setair\"");
        }

        return true;
    }
}

现在我可以使用WorldEdit选择一些东西,运行/setair以设置其中一个块.并且//undo做你期望的.

Answer 1

我不明白为什么这不起作用editSession = worldEditPlugin.createEditSession(bukkitPlayer);，但是因为您选择了更长的方式，worldEditPlugin.getWorldEdit().getEditSessionFactory().getEditSession(bukkitPlayer)您还需要使用：editSession.enableQueue();after。

下一个问题可能是你如何设置障碍。快速浏览一下源代码setBlock中的方法。有一个数字表明：

/**
 * Set a block, bypassing history but still utilizing block re-ordering.
 *
 * @param position the position to set the block at
 * @param block the block
 * @return whether the block changed
 */ 
 public boolean setBlock(Vector position, BlockStateHolder block) {

请注意它是如何说的“设置一个块，绕过历史记录和块重新排序”。

因此，如果您想记住块更改，您需要自己跟踪它，或者使用不同的 setBlock 方法：

/**
 * Sets the block at a position, subject to both history and block re-ordering.
 *
 * @param position the position
 * @param pattern a pattern to use
 * @return Whether the block changed -- not entirely dependable
 * @throws MaxChangedBlocksException thrown if too many blocks are changed
 */
 public boolean setBlock(Vector position, Pattern pattern)

请注意它是如何说的“将块设置在某个位置，受历史记录和块重新排序的影响”。

例如，这将设置一个块来播放，并且还将保留块历史记录：

Pattern pattern = new BlockPattern(BlockTypes.AIR.getDefaultState());
editSession.setBlock(minV, pattern);

现在您可以稍后使用撤消方法，如下所示：

//use a different EditSession to perform the undo in:
EditSession undoSession = ......;
editSession.undo(undoSession);

请注意，undoSession不应与您尝试撤消的会话相同。

编辑：源代码当前正在经历许多编辑/更改以支持版本 1.13（EditSession 类已于 23 小时前更新）。因此，您的 WorldEdit 库/插件可能需要更新，然后才能继续。