How to get gui node position with anchor

[vikash]

How I can get screen position of gui node that is anchored top. I tried gui.get_screen_position but its not working .

[britzl]

@vikash

I tried gui.get_screen_position but its not working .

It is not working how? What is the value you get and what is the expected value?

[vikash]

I want to get coin position of score node which is children of topbar node anchored with top and topbar children of root node.

[britzl]

Could it be related to pivot not taken into account when calculating screen position?

Gui.set_screen_position() and gui.screen_pos_to_node_pos()

gui.get_screen_position() ignores node’s pivot. I didn’t know that. As result, you get screen position without pyvot and set it using set_screen_position() which uses pivot (it is set_position() with a couple of tricks inside). The simplest solution here is using parent node for moving all nodes together (add the mto parent node, move, then remove from the parent node). But if you want I cat add method that add pivot calculations. UPD: I’ll fix it in the lib in a while

[vikash]

Ok, getting node position is now solved.

But I wanted to create coins after enemy destroyed and animate those coins to score node. So Coins are created using new_box_node but when deleting node I am getting error node deleted. If I have to do coins tweens animation to score node how I can do that.

[britzl]

@vikash

So Coins are created using new_box_node but when deleting node I am getting error node deleted

Can you please show the exact error message and the code for this?

[vikash]

Here is the code for creating and animating coins node

 elseif message_id == hash("spawn_coin") then
            self.coin = gui.new_box_node(message.position, vmath.vector3(60,60,0))
            
            gui.set_parent(self.coin, gui.get_node("score"), true)
            
            gui.set_texture(self.coin, "main")
            gui.play_flipbook(self.coin, hash("Coins"))
            
            gui.animate(self.coin, "position", vmath.vector3(22,0,0), gui.EASING_LINEAR, 3, 0, on_animation_done, gui.PLAYBACK_ONCE_FORWARD)
        end

and here it is deleting node after animation done

local function on_animation_done(self)
    gui.delete_node(self.coin)
    -- print(self.coin)
end

[vikash]

Error

ERROR:SCRIPT: /game/gui/HUD.gui_script:110: Deleted node
stack traceback:
[C] in function delete_node
/game/gui/HUD.gui_script:110: in function </game/gui/HUD.gui_script:109>

[Mathias_Westerdahl]

@vikash

coins

When you say “coins”, I suspect that you send multiple events “spawn_coin”.
Yet, you only keep track of a single coin with “self.coin”.

So, if you spawn two coins, before the first coin is done animating, the second coin will be deleted twice! (Since you overwrite the “self.coin”)

I think it should be enough if you instead use “local coin = gui.new_box_node()” etc. since these coins have a short lifespan and aren’t really used for anything else (if I’m not mistaken).