Continuing the series, today ad will continue part 7 which is moving between levels. Can be understood as moving back and forth to edit the senses. To learn about sence, please review from Lesson 0 of Game programming series with Godot. As for the level, do you guys play the game? mmorp then understand it is a level but in this it is a game screen. For example, if you play argry bird after stage 1, you will see that stage 2 is the Level I mentioned here. Without further ado, let’s get started.

Create New Sense

The first step is to create a new sense for yourself with the button “+” next to the sence tab World

Okay like this:

Choose for yourself Other Node then press enter.Note select other node then press enter don’t press anything else. It will give you the black button

And we’ll need to save Node Player and Node Tilemap about as .tscn to be able to put it into another sence without redoing it. And the like Node other like enemy nice trap

By the following way:

You right click on Node Player And Node Tilemap Choose for yourself Save Branch As Sense

That means it will save the node you just selected as tscn and in this tscn you can put your node in any sence without doing another one.

You can leave it anywhere. But remember to create a folder containing files like this for compactness.

Here I will save it in the folder tscn

In the folder you will see there 2 tscn just saved as Tilemap and Player

And next is Import Tscn enter sense

Choose the one in the picture:

==>

And here you will see there are 2-4 node It depends on your tscn. Mine has 3:

• 1 is Player.
• 2 is TileMap.
• 3 Is Level 1 is World

You guys Instance 2 is Player and TileMap come in

And you’ll see it’s like old sense

Note: In tilemap you may not need to save it as tscn anymore, just create a tilemap node and then enter the tileset and design a new level, if you want this sence to be different

Well, you guys like to save this sence 2 for yourself as level 2 and save it in a certain folder, mine is in the sence folder and Click Ctrl + WILL to save

And below is my level 2. Next we will create an object that moves between levels

Creating Sense Move Object

To move between levels you will need to create a Move Sense Object. First, you create your own node area2D live sense 1 Please

Add me 2 in Area 2D

In the Sprite section, you put your photos in and you can find them online

And here is my picture:

After running the game

Next, you create yourself a new script in Area2D

Then the code is as follows

Here below:

Part export(String,FILE,"*.tscn") var next_world this is the part it will take this out of the node’s settings and you can put tscn in there for it to point to

get_overlapping_boides is a function that helps you check the bodies inside collection bodies enter collsion it will do something.

for body in boides: for body in boides (just declared above) means that if a body is inside the boides it will execute the if statement below. this body is a command of this node, the body here is kinematicbody and staticbody

if body.name == player: body.name ie body and then get its name if by Player it will execute the command below. Well, the “Player” is the name of your Player node. If your Node player has any name, you must replace it with “Player” to be effective.

get_tree.change_sence this is an order of Godot help you move from sense this is sense other (next_world) is the function we declared above export.speak for easy understanding in Export it will allow you to give 1 sense Go in and then below if player touch the Object Move Sense then it will move Player arrive sense in the section Export

Next, you save it and return to the sence, you will see there Next World live Node Area2D Right side of the Place Script Variables.

Next, you click on the folder next to next world and choose the second sence

And it will be

Ah and we have to set collection for area2D Then the Player can move to another level

I have set it up and it can move to another level

And if you want better, you can do the following:

Set limit camera How much is it on the right, then adjust collsion of the sprite area2d behind the camera limit. When the camera reaches the number you set it will no longer move and after you move behind the limit camera player will be moved.

In this part, I will show you how to be able to move between levels 1,2,3,etc when reaching the end of a level.

Create New Scene

First, you create a new Scene with Area2D as the root node.

Here, I use Area2D because I will create an area and when the PLAyer enters it will move to the next level.

Done, then save it in the Scene folder.

Next, add the script to it.

The script includes the following:

extends Area2D


export (String,FILE) var LevelKeTiep


func _on_KhuVucDiChuyen_body_entered(body):
    if body.name == "Player":
        get_tree().change_scene(LevelKeTiep)

I declare a variable and this variable is special where I use it export(this is the command that will make the variable appear outside the Inspector so it can be easily edited)

I add (String,FILE) behind to be able to select files from outside the Inspector.

You can find more documentation here: GDScript exports

As for the function below, you have to connect signal to appear.

if body.name == “Player” is that I check that if the Body comes in and the name is Player (name of the character scene that you and I created), it will move to the Level assigned to the above variable.

You click on Area2D

Through the Node tab, click 2 and click on the enter body (here I use the body entered because the Player is a KinematicBody2D, so I will use the signal to determine when a body enters Area2D)

The table that appears, select Area2D and then click Connect.

You can know that the signal has been connected successfully by looking at the two symbols in the two pictures above.

New Level

After you’re done, create yourself a new level similar to how you create a Scene Map.

After creating a new 2D node, rename it to map2.

And instead of redoing the tilemap you can go to the first map to copy it.

Go to map 2 and paste it out.

After pasting, we get the same tilemap as the first Map and you just need to adjust it

My Map 2 after editing.

Add Player and Background like Map 1, copy it and you’re done.

Instance teleportation area

You Instance node has just moved to Map1

Right-click and select editable children to edit it.

Select CollisionShape2D and select its shape.

After selecting the shape, it will appear like this.

And you drag it to the place where we need to change the level by clicking on the Area and clicking the move icon on the toolbar, but don’t drag the CollisionShape2D away.

I have moved to the position I want and I edited the CollisionShape2D so that it is reasonable.

You won’t be able to move yet because you haven’t told it which scene you want to move through, so in KhuVucDichChuyen click on the folder icon.

Find and select Map2 then click Open.

Once done, Map2 has been added to the LevelKeTiep variable

Above, when I enter, I will be transferred to Map2.

Here, you can apply many ways to make the most of it, such as:

• Set camera limit in front of the moving area
• Add Sprite in Scene KhuVucDiChuyen for easy identification.

summary

In this section, I have shown you how to move between levels together and depending on your creativity and understanding, you can design many other things.

In this part, I will show you how to create a menu when you finish playing a level and it will be able to move to the next level, play again and return to the Level Map menu.

Copy Scene

Then instead of having to recreate it from scratch, you can duplicate a new scene from the scene pause menu.

You find the pause menu in the filesystem right click and click duplicate

I will rename it EndLevelMenu

Then you delete the other nodes and leave them as shown, I changed the name NutTepTuc to LevelKeTiep

Edit text in TieuDe

You will clear the old script by pressing the button with the paper that has an x

Then create a new one.

Then 3 buttons, you disconnect because it is connecting to the old script.

Then reconnect 3 new ones.

Then Instance EndLevelMenu to Map.

Then you remember to hide the EndLevelMenu that belongs to the Control Node type.

Script

extends CanvasLayer



onready var level = get_parent().get_node("KhuVucDiChuyen")

func _on_NutLevelKeTiep_pressed():
    get_tree().paused = false
    get_tree().change_scene(level.LevelKeTiep)
    pass # Replace with function body.

func _on_NutChoiLai_pressed():
    get_tree().paused = false
    get_tree().reload_current_scene()
    print("choi lai")
    pass # Replace with function body.


func _on_NutVeMenu_pressed():
    get_tree().paused = false
    get_tree().change_scene("res://Scences/Map/LevelMap.tscn")
    pass # Replace with function body.

Here is the code of the EndLevelMenu script.

2 signals of the replay button and the menu will remain the same.

For LevelKeTiep to save time instead of having to manually set it up to see which level it moves to the next level, I’ll take it. At the KhuVucDi Chuyen node, I have created a variable called LevelKeTiep and it carries the data of the next scene, so I will call that variable instead of doing it manually.

onready var level = get_parent().get_node("KhuVucDiChuyen"): is that I declare it and assign it with the parent node of the EndLevelMenu (as shown in the picture) and from that parent node I can access the KhuVucDi Chuyen node to get the data of the LevelKeTiep variable.

extends Area2D


export (String,FILE) var LevelKeTiep
onready var endlevelmenu = get_parent().get_node("EndLevelMenu")

func _on_KhuVucDiChuyen_body_entered(body):
    if body.name == "Player":
#		get_tree().change_scene(LevelKeTiep)
        endlevelmenu.get_node("EndLevelMenu").show()
        get_tree().paused = true

In the script of KhuVucDIChuyen, I changed it a little bit.

Here, instead of moving to the next level as usual, I will show it the EndLevelMenu and then stop the tree like in the pausemenu.

If you wonder why I get_node() 2 EndLevelMenu, then look at the picture below.

I call 2 EndLevelMenu because I have 2 nodes :).

And here are my results

Summary

In the next part, I will show you how to calculate the score after collecting the coins and when you go out of the LevelMap you will get the number of stars corresponding to the number of points.

In this section, I will show you how to unlock the next level after completing the previous level.

It’s not that you like to click on any level to play that level.

Unlock levels

Algorithm

For this part, I will have the following algorithm:

+ I will add a variable in PlayerData to store the data of which map has been unlocked, with the structure as below:

var Unlocked_map = {
    "Map1": false,
    "Map2":false,
    "Map3":false,
}

+ Then in KhuVucDiChuyen after the Player has gone there ie won the game, then I will set the Map I am playing in the Unlocked_map variable to true

func _on_KhuVucDiChuyen_body_entered(body):
        PlayerData.Unlocked_map[get_parent().name] = true

+ Then, in the Level scene, I will check if I click on that Level and that Level if it is Map1, it will play Map1 because this is the first map I need to play.

+ Then, if it’s not Map1, that means you’ve clicked on Level 2 or higher and then I check if the previous Map that you clicked on has been completed, I will switch to playing that Map.

For example: If I haven’t played Map1, then Unlocked_map[“Map1”] is = false, I click on Level 2 and then Level2 checks if Unlocked_map[“Map1”] is = false then you have not completed it and can not play level2 and vice versa.

PlayerData

extends Node


var diemso = {
    "Map1": 0,
    "Map2":0,
    "Map3": 0,
}
var Unlocked_map = {
    "Map1": false,
    "Map2":false,
    "Map3":false,
}

I added a dictionary containing the data of unlocked maps.

AreaVucDiTrans

extends Area2D


export (String,FILE) var LevelKeTiep
onready var endlevelmenu = get_parent().get_node("EndLevelMenu")

func _on_KhuVucDiChuyen_body_entered(body):
    if body.name == "Player":
        endlevelmenu.get_node("EndLevelMenu").show()	
        get_tree().paused = true
        PlayerData.Unlocked_map[get_parent().name] = true

Moving area, I put 1 more line at the end.

And if you notice in the previous section, I have a few lines of code to add scores, but to add scores to PlayerData, it has to press 1 of 2 buttons. So, what if the player just went in and the menu won the game out? Definitely have to start over again.

+ So I will put a small exercise here is to transfer the line of code to add scores to PlayerData in EndLevelMap through KhuVucDiChuyen.

Level Scene

At the Scene level, I just added the code to the Hinhtron_pressed() function:

func _on_HinhTron_pressed():
    var level_truocdo = int(Level) - 1
    if MapName != "Map1":
        if PlayerData.Unlocked_map["Map"+ str(level_truocdo)] == true :
            get_tree().change_scene(Scene)
    else: 
        get_tree().change_scene(Scene)

I create one more variable level_truocdo and I add int() at Level because the Level variable is being declared as String if you don’t add int, it will be String – Integer and cause an error.

Result

Now if you run the game and click on the level you will see that it doesn’t go to the level 2 scene anymore, but has to complete the level 1.

Because of this, I don’t know what kind of picture I should get for you to see, so please read it @@.

Summary

In this section, I have shown you how to be able to add the level unlock feature. In the next part, the sound will be added.