Game with separate files tryout

[SynfigMaster91]

I said "or even".
You either call square.speed or call speed and declare the variable.

But I did so!

local square = {}
speed = 40

And changed this!

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = square.x + speed * dt
end
if love.keyboard.isDown("left") then
square.x = square.x - speed * dt
end
if love.keyboard.isDown("up") then
square.y = square.y - speed * dt
end
if love.keyboard.isDown("down") then
square.y = square.y + speed * dt
end
end

But nothing!

[xNick1]

square.x = square.x + 40 * dt

Step by step.
Then you're gonna investigate why your code didn't work.
It won't work anyway cause you're using an empty table now.
square.x doesn't exist anymore.
You needed it.
If you don't wanna use a table you have at least to declare a variable called x and use that one

[SynfigMaster91]

I said "or even".
You either use square.speed or use speed and declare the variable.

Please consider using some Lua tutorial:
http://tylerneylon.com/a/learn-lua/

You won't have such issues anymore!

Nah man, love is user friendly.
It's just picky about who his friends are

I did this:

Code: Select all

local square = {x = 10, y = 10, speed = 50}

function square.update( dt )
   if love.keyboard.isDown("right") then
      square.x = square.x + speed * dt
   end
   if love.keyboard.isDown("left") then
      square.x = square.x - speed * dt
   end   
   if love.keyboard.isDown("up") then
      square.y = square.y - speed * dt
   end
   if love.keyboard.isDown("down") then
      square.y = square.y + speed * dt
   end  
end

function square.draw()
   love.graphics.rectangle( 'fill', x, y, 50, 50 )
end

-- return the square local so we can access it outside of this file
return square

But now...

Error

square.lua:19: bad argument #2 to 'rectangle' (number expected, got nil)

Traceback

[C]: in function 'rectangle'
square.lua:19: in function 'draw'
main.lua:12: in function 'draw'
[C]: in function 'xpcall'

[xNick1]

Now you're using the table again, so it's square.x in your draw callback etc

Please consider following a tutorial about variables and tables

[SynfigMaster91]

Now you're using the table again, so it's square.x in your draw callback etc

Please consider following a tutorial about variables and tables

I know about variables, but I'm doing this.

local square

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = 10 + 40 * dt
end
if love.keyboard.isDown("left") then
square.x = 10 - 40 * dt
end
if love.keyboard.isDown("up") then
square.y = 10 - 40 * dt
end
if love.keyboard.isDown("down") then
square.y = 10 + 40 * dt
end
end

function square.draw()
love.draw.rectangle('fill', 10, 10, 50, 50)
end

-- return the square local so we can access it outside of this file
return square

[MadByte]

...

local square = {}
speed = 40

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = square.x + speed * dt
end
if love.keyboard.isDown("left") then
square.x = square.x - speed * dt
end
if love.keyboard.isDown("up") then
square.y = square.y - speed * dt
end
if love.keyboard.isDown("down") then
square.y = square.y + speed * dt
end
end

...

This one seems to be alright. Maybe the error now is somewhere else?
I thought it might help you to see a similar example to identify the problem you have in your code so I attached the moving square example.
Hope it helps.

To see the lua files, unpack it with any file archiver (7-zip, winrar, etc).

[xNick1]

Now you're using the table again, so it's square.x in your draw callback etc

Please consider following a tutorial about variables and tables

I know about variables, but I'm doing this.

local square

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = 10 + 40 * dt
end
if love.keyboard.isDown("left") then
square.x = 10 - 40 * dt
end
if love.keyboard.isDown("up") then
square.y = 10 - 40 * dt
end
if love.keyboard.isDown("down") then
square.y = 10 + 40 * dt
end
end

function square.draw()
love.draw.rectangle('fill', 10, 10, 50, 50)
end

-- return the square local so we can access it outside of this file
return square

This way, square.x doesn't exist
And square wouldn't have any value, so you don't need it.
Please read the error messages, they're saying what's wrong with your code!

[SynfigMaster91]

...

local square = {}
speed = 40

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = square.x + speed * dt
end
if love.keyboard.isDown("left") then
square.x = square.x - speed * dt
end
if love.keyboard.isDown("up") then
square.y = square.y - speed * dt
end
if love.keyboard.isDown("down") then
square.y = square.y + speed * dt
end
end

...

This one seems to be alright. Maybe the error now is somewhere else?
I thought it might help you to see a similar example to identify the problem you have in your code so I attached the moving square example.
Hope it helps.

To see the lua files, unpack it with any file archiver (7-zip, winrar, etc).

I did as you said, but...

Error: Syntax error: square.lua:11: unexpected symbol near '10'

stack traceback:
[C]: at 0x68d0f9a0
[C]: in function 'require'
main.lua:2: in main chunk
[C]: in function 'require'
[string "boot.lua"]:429: in function <[string "boot.lua"]:275>
[C]: in function 'xpcall'

I'm more desperate than ever!

[xNick1]

...

local square = {}
speed = 40

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = square.x + speed * dt
end
if love.keyboard.isDown("left") then
square.x = square.x - speed * dt
end
if love.keyboard.isDown("up") then
square.y = square.y - speed * dt
end
if love.keyboard.isDown("down") then
square.y = square.y + speed * dt
end
end

...

This one seems to be alright. Maybe the error now is somewhere else?
I thought it might help you to see a similar example to identify the problem you have in your code so I attached the moving square example.
Hope it helps.

To see the lua files, unpack it with any file archiver (7-zip, winrar, etc).

He deleted the variables in the table. It was crashing cause there were no square.x etc

[SynfigMaster91]

...

local square = {}
speed = 40

function square.update( dt )
if love.keyboard.isDown("right") then
square.x = square.x + speed * dt
end
if love.keyboard.isDown("left") then
square.x = square.x - speed * dt
end
if love.keyboard.isDown("up") then
square.y = square.y - speed * dt
end
if love.keyboard.isDown("down") then
square.y = square.y + speed * dt
end
end

...

This one seems to be alright. Maybe the error now is somewhere else?
I thought it might help you to see a similar example to identify the problem you have in your code so I attached the moving square example.
Hope it helps.

To see the lua files, unpack it with any file archiver (7-zip, winrar, etc).

He deleted the variables in the table. It was crashing cause there were no square.x etc

Then this doesn't help...

One more strike and I leave LÖVE and Lua forever!