A few questions

glancedUp

Hello, I am a Godot newbie. I am making a Pac-Man like game.

My questions are;

How can I make a sprite appear on the other side of the screen after it gone over on one side?
How can I randomize spawning location for enemies every time the game start?
How can I randomize the starting and end location of AI enemies?

Thanks in advance. >_<

_807_

you can use "visibility_notifier" to know when object is out of screen and in this frame you can change their position to set_global_pos.x (get_global_pos.x + or - "Your-game-size-width") if object dissapears by left or right side, and the same in set_global_pos.y with "Your-game-size-height" if it´s up or down . You can do same manualy in fixed_process with: (if object.get_global_pos.x > "game_size_width"+object_size: object.set_global_pos etc etc etc....
Take the "max" initial pos available in x (your game size), set the pos of the object here and multiply this position by randf(). (randf returns a number between 0 and 1). Same for the Y position. Or multiply directly the entire Vector2 (but the position in this case is a diagonal of the screen).
Same at 2.

Note: Your-game-size-height, game_size_width, etc... are not functions, are your constants. Screen size is available in "OS" singleton of the engine. Simply write "OS." in the script screen and autocomplete show you the available functions.

glancedUp

Hello 807,

Thank you very much for your response. Really appreciated.

Regarding your answer to number 1, how to get the "object_size"? That means the size of the sprite right? should i use get_region_rect() function?

Thanks. >_<

** P.S. I haven't test the answer in number 2 yet, maybe I'll have to ask about it too later. :)

_807_

You can get the size of the texture, the sprite have "scale" but not "size"... size texture is:

	·get_node("Sprite").get_texture().get_size()

Texture size is Vector2, so, if you whant to check texture size X:

	·get_node("Sprite").get_texture().get_size().x   -----> "this return INT"

if you whant to check texture size Y:

	·get_node("Sprite").get_texture().get_size().y -----> "this return INT"

I don´t have GODOT now, but I think this is the proper way. But I don´t recomend use get_node under process or fixed process, if your texture doesn´t change in runtime, make a const/var with this in declaration part of the script:

	·onready var SizeOfMySprite = get_node("Sprite").get_texture().get_size() ----> "return Vector2, if whant INT add a dot and "x" or "y" "

	or 

	·onready const SizeOfMySprite = get_node("Sprite").get_texture().get_size()

I don´t know if the last works and now i can´t check, probably const can´t be defined in _ready.

glancedUp

It works now!! :smiley: Thanks very much >_<
For no.2 I'm sorry but can I get the code example as well? >_< I'm afraid I don't know how to set the position of the sprite on those max pos available and I'm not really sure how to set pos there. And then the randf thing, I'm just not sure how to write the code.

I got a new problem. 5. I don't know how to set up an AI movement for the enemies. I want the enemies to move randomly from their random initial pos to a random end pos. I know how to set up Navigation2D with Navigation Polygon Instance but I don't know how to code the movement of the AI enemies.

P.S.: I am really thankful for the time you spent helping me figuring this all out. I'm sorry for being so noob about this and using your precious time. Thanks so much again. :wink:

_807_

mmmm.... difficult to do your AI game code, the random spawn thing can be something like this:

	extends KinematicBody2D

	#This is a KinematicBody2D with a Sprite inside
	#This object need an Collision Polygon to collide.
	#You should do that in the editor.
	#This script is for a game that fits the "width" and "height" configured in the editor
	#Don´t tested. 
	#Probably there is better way to do that.
	
	onready var SpriteSizeX= get_node("Sprite").get_texture().get_size().x
	onready var SpriteSizeY= get_node("Sprite").get_texture().get_size().y
	var MyGameSizeX = get_tree().get_root().get_visible_rect().size.x
	var MyGameSizeY = get_tree().get_root().get_visible_rect().size.y
	
	func _ready():
		#Restarting random number generator:
		randomize()
		#Clamp the value of X with the max pos available for the sprite texture:
		var RandomPositionXSprite = clamp(MyGameSizeX*randf(),SpriteSizeX/2,MyGameSizeX-SpriteSizeX/2)
		#Clamp the value of Y with the max pos available for the sprite texture:
		var RandomPositionYSprite = clamp(MyGameSizeY*randf(),SpriteSizeY/2,MyGameSizeY-SpriteSizeY/2)
		#Set position of the kinematic object:
		self.set_global_pos(Vector2(RandomPositionXSprite,RandomPositionYSprite))
		set_fixed_process(true)
	
	func _fixed_process(delta):
		logic_for_the_enemy()

glancedUp

Hi 807,

big thanks for your help. It works! :smiley: