The Haunted Library Part 3: The Secret Room
In this lesson, we will build a hidden basement under the library, and the secret passage to get there.
We will also learn how to use spawnEntity() to add things like mobs, paintings, and item frames.
The diagram below shows where the secret room will be under the library. The secret passage is built into a bookshelf. The ceiling of the secret room will be three blocks below the floor of the library.
Add a property called secretPassage to the library object, and assign it to an empty object, {}.
First, define a method for library.secretPassage called open.
You will need to figure out which bookshelf in your library.bookshelves.data array is the one that you want to use.
In this case, it was the second bookshelf in the list, so we use the index 1.
Then, make an export function that calls your library.secretPassage.open() method. We will use this function to test several different methods in this lesson.
Save, deploy, reload, and call /js secretPassage(). You should see an opening appear in the bookshelf.
See if you can write the rest of the drone code to open a secret passage down by yourself, using a for loop.
Remember, with each step you need to:
1. Place a box of air blocks, 3 blocks tall.
2. Move the drone forward 1 block.
3. Move the drone down 1 block.
You will need to repeat this for a total of 6 times.
Hint: If you get stuck, the answer is in the step below
We're going to close the secret passage by rebuilding the bookshelf on top of it.
Once you have made this method, call it in your secretPassage() exports function, and comment the library.secretPassage.open() method.
Save, deploy, reload, and call /js secretPassage(). The secret passage should be completely hidden.
Find a good location for your hidden lever to appear. You will probably want it to be just two blocks above the ground, so that players can reach it, but having to climb up a ladder to get to the lever would be cool!
Add a lever property to the library.secretPassage object. Yaw doesn't matter very much here, so you can use 0 for the yaw and the pitch.
Make a new method for library.secretPassage.lever called show. It will just place one lever block.
Then, call this method in secretPassage, and comment the others.
Save, deploy, reload, and call /js secretPassage(). A lever should appear in the middle of your bookcase.
You should make a called hide for library.secretPassage.lever. You can copy your library.secretPassage.lever.show method almost exactly, but change the block material to a bookshelf.
Then, call this method in the secretPassage export function, and comment the others.
Be sure to test your code by saving, deploying, reloading, and calling /js secretPassage()!
Add a property called open to library.secretPassage. It starts out as false, because the secret passage should be closed when we start.
When we open the passage, we want to mark that opened is true, and mark that it is false again when we close the passage. Add these lines to change the variable.
Switching a variable back and forth from true to false is called toggling.
To make sure people will notice that the passage is opening, add a sound effect.
The playerInteract event fires any time a player clicks anything (or stands on a pressure plate). Add this event function with a function as an input (function-inception, I know!) to send a message when a player clicks this lever.
Save, deploy, reload and click your lever. You should see the broadcast message you wrote in the previous step.
Then, place a lever somewhere else, and try using it, to make sure you do NOT get the message.
Also try clicking some other blocks in the library, to make sure that only this lever gives you the message.
Add this code to make the lever open the secret passage and close it.
Save, deploy, reload, and pull the secret lever.
It should first open the secret passage, and then close it again!
We are going to start the corner of the room at the bottom of this passage. To find the location, head down the passage, and turn to your right. Look at the bottom block and record the location.
Yaw is important here to make your room build in the correct direction!
Add a property called secretRoom to your library object, and make it an object with a property called loc that is assigned to the location we just found.
The room will be 15 long and 13 blocks wide (remember that you are start in the back left corner of this diagram, facing to the right), and 3 blocks tall.
Make a method for library.secretRoom called build that creates a drone at library.secretRoom.loc and builds the space with air blocks.
Call your library.secretRoom.build method in the buildLibrary exports function, and comment everything else.
Save, deploy, reload, and call /js buildLibrary()
The diagram below shows the elements we will be adding to this secret room. The different densities of cobweb will add a lot of code, so if you only want to add the high-density block that is fine.
With the drone's rand() method, there are 2 different ways to tell it what blocks to randomize.
- If you want an even distribution of blocks, you can use an array:
var randomWool = [blocks.wool.white, blocks.wool.gray, blocks.wool.black]; rand(randomWool, 10, 10, 10);
This will produce a 10x10x10 box with an even number of white, gray, and black wool blocks.
- If you want more of one kind of block and fewer of another, use an object:
var randomWool = {} randomWool[blocks.wool.white] = 1; randomWool[blocks.wool.gray] = 2; randomWool[blocks.wool.black] = 4; rand(randomWool, 10, 10, 10);
This will produce a 10x10x10 box with twice as many gray wool blocks as white wool blocks, and four times as many black wool blocks.
We are going to use the technique of the last step to make 3 different cobweb spots, with more cobweb in the corner and less around the outside, but you could always just use cobwebHigh for all 4 spots and not worry about it.
Save, deploy, reload, and call /js buildLibrary() to add the cobwebs to the secret room. They should be in the back right corner from the entrance.
We're going to move the drone back to the start, to add bookshelves and a chest. The bookshelves will help with the lighting.
Save, deploy, reload, and call /js buildLibrary(). You should have two bookshelves near the entrance, and a chest tucked in on the far side of one of them.
Just like with doors, we have a special drone method to make beds called .bed(). We will use it to add 2 here.
Save, deploy, reload, and call /js buildLibrary(). You shoudl have 2 beds, 1 block away from the back wall.
The painting will position itself to fit in the space, so we just need to find a block on the wall behind the bed.
Create a new property of library.secretRoom called paintingLoc
Make a method called placePainting for library.secretRoom, and then call it in your buildLibrary exports function.
What happens if you call buildLibrary() again?
We're going to make a variable called Art so that we don't have to type org.bukkit.Art every single time we want to set the artwork of a painting.
We are going to set which art should be in the painting, by using the setArt method.
Save, deploy, and reload.
Before you call /js buildLibrary, you need to make sure you destroy the painting that is already there.
Place a block down and use the debug menu's "Looking at" information to find its location. Spawned entities always face the same direction, so yaw does not matter here.
Create a property, skeletonLoc for library.secretRoom, and assign it to the location you chose in the previous step.
We are going to spawn a skeleton sitting in a boat. Do you remember the .addPassenger method from the pig stacking plugin?
The .setAI(false) line allows us to make a skeleton that won't move or shoot! Very useful.
Then, call the spawnLibrarianSkeleton() function inside your secretPassage() exports function, and comment the other code.
Save, deploy, reload, and call /js secretPassage(). You should have a skeleton in a boat.
It may be facing a different direction from this image.
You can equip and name your skeleton just like any other custom mob. Give it some equipment and a name.
Use the drone to move to the location you just saved, and build an enchanting table in your library.secretRoom.build method. Comment out the rest of the code for now.
Make sure that the exports.buildLibrary function calls library.secretRoom.build() and nothing else. Then save, deploy, reload, and call /js buildLibrary().
Use what you learned from the painting in the basement to add a portrait on the walls of the library.
Call your library.portrait.place method in the buildLibrary function to test it. We will move this somewhere else later.
Make sure library.interior.build is uncommented in your buildLibrary function. Then save, deploy, reload, and call /js buildLibrary().
Why doesn't this look like a real dropper? I don't know! But it won't matter, as we are going to put some things in front of it.
To add the "drawers", we do two steps:
- Use
.spawnEntity()to spawn an item frame in front of the dropper. - Use
.setItem()to make the item frame hold a button.
Call the library.filingCabinet.buildDrawers method in buildLibrary, and temporarily comment all the other code.
Save, deploy, reload and call /js buildLibrary() to see the new drawers.
Congratulations, you have finished building all the structures we will need for the library! In the next lesson, you will learn how to add items to inventories (like the filing cabinet), and make custom inventories, books, and even villager trades!
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