setVisible() having trouble

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1

I wrote a function two flip back and forth between 2 sprites (see below), I'm using setVisible to [show sprite 1 - hide sprite 2] then [hide sprite 1 show sprite 2] but it's not working, I'm thinking it actually has something to do with updating the sprites afterward but I can't figure it out.

It starts out right (with sprite 2 hidden and sprite 1 showing) then after second sprite 2 shows up but sprite 1 doesn't hide.

function AnimateHelo()
local helo_01 = playdate.graphics.sprite.new()
local helo_01_img = playdate.graphics.image.new("images/helo_01.png")
helo_01:setImage(helo_01_img)
helo_01:setCenter( 0.0, 0.0 )
helo_01:moveTo(281, 27)
helo_01:add()

local helo_02 = playdate.graphics.sprite.new()
local helo_02_img = playdate.graphics.image.new("images/helo_02.png")
helo_02:setImage(helo_02_img)
helo_02:setCenter( 0.0, 0.0 )
helo_02:moveTo(281, 27)
helo_02:add()


delay -= 1
if delay < 0 then 
	delay = 30
	helo_frame +=1
	if helo_frame > 2 then
		helo_frame = 1
	end	
end

if helo_frame == 1 then
	helo_01:setVisible(true)
	helo_02:setVisible(false)	
elseif helo_frame == 2 then
	helo_01:setVisible(false)
	helo_02:setVisible(true)
end

end

2

Is this all of your code?

You need the playdate.update() function and put the playdate.graphics.sprite.update() call in there

3

Source.zip (17.3 KB)

That's just my function, here's the whole thing, the call is in there.

Brian

4

OK, you're defining the sprites in your AnimateHelo() function, so with each call you're adding more and more sprites each time - and with the current flow they all end up being visible.

So, move the 12 lines that define your two sprites to myGameSetUp() (and helo_01 and helo_02 will no longer be able to be local) and things will run as you intended!

I tested this changed code: TEST.zip (18.1 KB)