What does it mean?

Minstrel

Hello so i've already had a question answered and that worked fine but now... It's saying this: bad argument #1 to '?' (TextureBase or TextureRegion expected, got no value)
stack traceback:
main.lua:89: in function

This all happen when I press the fire key Z
Sorry I can't provide more info than this, but I really don't know what else to say.

Here is the entire code:

local sound = Sound.new("MakoBeamNCSGiderosCompRemix(-32Db).wav") local channel = sound:play()   application:setBackgroundColor(0x0)   width = application:getContentWidth()   local username = ""   local textInputDialog = TextInputDialog.new("Player1", "Enter Name Player1", username, "Cancel", "Save")   backgroundtexture = Texture.new("BGComp.png") backgroundtexture = Bitmap.new(backgroundtexture) stage:addChild(backgroundtexture) backgroundtexture:setAnchorPoint(0.5,0.5) backgroundtexture:setRotation(90) backgroundtexture:setPosition(239,160) backgroundtexture:setScaleX(1.75) backgroundtexture:setScaleY(1.75)   local retrofont = TTFont.new("8-BIT WONDER.TTF", 20, true) local text = TextField.new(retrofont,username) text:setPosition(0, 20) stage:addChild(text) text:setTextColor(0xfffffff) text:setScale(1.0) text:setPosition(10,20)   bullet = Texture.new("bullet.png") bullet = Bitmap.new(bullet) stage:addChild(bullet) bullet:setScale(0.3) bullet:setPosition(0,0) bullet:setRotation(-90)   playership1 = Texture.new("ship.png") playership1 = Bitmap.new(playership1) stage:addChild(playership1) playership1:setAnchorPoint(0.5,0.5) playership1:setPosition(245,300) playership1:setScale(1.0) --playership1:setColorTransform(0.1,0.9,0.3)   local function onComplete(e) --if e.buttonIndex then username = e.text text:setText(username) --end end   textInputDialog:addEventListener(Event.COMPLETE, onComplete) textInputDialog:show() left = false right = false   shipX=width/2 playerDir=0 bDir=0 by= 1   bullets = {} counter = 1   Pool = Core.class(Sprite)   function Pool:init() self.pool = {} end   function Pool:createObject() local b --if there is anything in pool take it if #self.pool > 0 then b = table.remove(self.pool) else b = Bitmap.new(Texture.new("bullet.png", true)) end stage:addChild(b) return b end   function Pool:destroyObject(b) b:removeFromParent() table.insert(#self.pool, b) end     function gameloop(e) shipX=shipX + (playerDir* 5)   if shipX<20 then shipX = 20 elseif shipX>(width-20) then shipX = width - 20 end   playership1:setX(shipX)   by=by+(bDir*5) bullet:setY(by)   end   stage:addEventListener(Event.ENTER_FRAME,gameloop)   stage:addEventListener(Event.KEY_DOWN,function(e) if e.keyCode==KeyCode.LEFT then left=true playerDir=-1 elseif e.keyCode==KeyCode.RIGHT then right=true playerDir=1 elseif e.keyCode==KeyCode.Z then   print("fire") bx,by=playership1:getPosition() bullets[counter] = bullet.new() stage:addChild(bullets[counter]) bullets[counter]:setPosition(bx,by) bDir=-1   counter = counter+1   end   end)   stage:addEventListener(Event.KEY_UP,function(e) if e.keyCode==KeyCode.LEFT then left=false if right then playerDir=1 else playerDir=0 end   elseif e.keyCode==KeyCode.RIGHT then right=false if left then playerDir=-1 else playerDir=0 end end end)

I would use the internet for this but I've no idea how to search this problem so I thought I'd ask the forums.
Thank's for your time.

SinisterSoft

Which line is line 89 in your editor?

hgy29

Let me guess:
bullets[counter] = bullet.new()
Right ?

talis

@Minstrel just fyi. To make you code post readable, next time highlight your code in your post.

Here is how to do it:
Remove the whitespace in below example.

< pre lang="lua">
here goes your code to highlight...
< /pre>

And for your question:
1-Are you sure the name of the file is bullet.png (in android capital letter matters do not forget)
2-Check the file format also can it be opened by image viewer.

pie

Hi, knowing which one is line 89 would help

At a first glance, there are some things I would change:

I can see the Pool class but I can't see it initialized:
I think it's better if you copy Pool class at the beginning of the file, to be sure you have it available when you create its instance.

You create a Pool instance with

bpool = Pool.new()

(I named it bpool, but you can name it as you like)

I suppose you don't need to add bpool to stage, since it's just a "repository"

In Pool:createobject()

--if there is anything in pool take it if #self.pool > 0 then b = table.remove(self.pool) else b = Bitmap.new(Texture.new("bullet.png", true)) --i think you want to add these: b:setScale(0.3) b:setPosition(0,0) b:setRotation(-90) end --stage:addChild(b) remove this line return b

I can't see a bullet class, but you create a new bitmap instance in the pool if the pool is empty, so, instead of bullet.new, ask the pool to create your bullet:

bullets[counter] = bpool:createobject()

I didn't test anything, this may contain errors :-\"

Minstrel

function gameloop(e)
is line 89

Minstrel

well it was before I added what pie said so now it's: function Pool:destroyObject(b)

Minstrel

Btw Talis Do where do I put what you said? Inside the pool function or elsewhere?

Minstrel

Ok now it says for the error:
main.lua:68: unexpected symbol near '='
main.lua 68 = a = {{"one", "two"}, 3}
and is part of this:

< pre lang="lua">
a = {{"one", "two"}, 3}
b = {k = a[1]}
< /pre>

Again... Very confused I've done exactly as directed by Talis.
Thank's for your support

pie

@Ministrel I think that @talis was just making an example on how to highlight code, I can't see how that code could be used in your project

If your error was in #89, and it was "TextureBase or TextureRegion expected, got no value" there is something wrong with some "texture object" you're calling in gameloop.


I think it's where you setX on playership1.

so I noticed one thing you're messing up: naming

playership1 = Texture.new("ship.png") playership1 = Bitmap.new(playership1)

when you state something with the = sign, you're "overwriting" what comes before the sign with anything you have after: in this case playership1.
You say it is a texture first, then you say that the same object is a Bitmap. This could be a good reason to have that texture related error.

try with

playership_txture = Texture.new("ship.png") playership1 = Bitmap.new(playership_txture) --OR --playership1 = Bitmap.new(Texture.new("ship.png")) --which is the same as the two lines above

Minstrel

Ok so I was a bit of an idiot thinking that was code... So I did as you recommended the TextureBase error is gone... but now we have this:

< pre lang="lua">
a = {{"one", "two"}, 3}
b = {k = a[1]}
< /pre>
[string "property.lua"]:39: bad argument #2 to 'setmetatable' (nil or table expected)
stack traceback:
[string "property.lua"]:39: in function 'class'
main.lua:65: in main chunk

So I'm going to make a new discussion on that because my question on this discussion has been answered.
Once again, Thank you for your continuing help and support.

Minstrel

Ok so I've done what you said and I can now start the game (WooHoo)
So now were back to my first problem... It's giving me an error when I press the fire key Z.
But do not fear it's a different one so we're definitely getting there.

The Error is:

main.lua:122: attempt to call method 'createobject' (a nil value) stack traceback: main.lua:122: in function <main.lua:111>

and line 122 is:

bullets[counter] = bpool:createobject()

Once again thank you for your continued support help and time and I know we're getting there, I can feel it!

keszegh

try createObject, with capital O

talis

@minstrel it was an example how to highlight your code on this forum. It is nothing related with your question

So as a result do not add this code that i posted no where in your main.lu please . It was just an example.

Note: I edited my post and deleted the code sample

Minstrel

Ok thanks. No worries about it though and thanks for the tip.