Passing arrays from one function to the other

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TheComet

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Posted: 9th May 2009 20:00

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Hey guys!

How would I get this to work:

+ Code Snippet

rem setup screen
sync on
sync rate 60
backdrop on

rem program
setup()
run()

rem functions --------------------------------

function setup()

   rem arrays
   dim x(10)
   dim y(10)
   dim z(10)

endfunction

function run()

   rem main loop
   do

      rem print arrays to screen
      print x(4)
      print y(3)
      print z(7)

      rem refresh screen
      sync

   rem end of main loop
   loop

endfunction

TheComet

Peachy, and the Chaos of the Gems

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Latch

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Posted: 10th May 2009 00:24

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Arrays declared inside of functions are local to that function and can't be seen by the rest of the program. You'd have to declare your arrays in the main program - not within a function:

+ Code Snippet

rem setup screen
sync on
sync rate 60
backdrop on

rem arrays
dim x(10)
dim y(10)
dim z(10)

rem program
run()

rem functions --------------------------------

function run()

   rem main loop
   do

      rem print arrays to screen
      print x(4)
      print y(3)
      print z(7)

      rem refresh screen
      sync

   rem end of main loop
   loop

endfunction

The layout of your porgram suggests something to me - though I could be completely off base - that you are trying to make a DB program that can create it's own exe by perhaps saving functions from within the program and then using #include to execute them. In case that is what you are trying, it won't work. When the DB program is first compiled, all includes are imported from the start. The compiler won't import any additional code once it is running. It only steps through what it was built with.
If I'm wrong about what you were trying, I apologize for assuming and you can just ignore this.

Enjoy your day.

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That1Smart Guy

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Posted: 10th May 2009 02:08

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not sure exactly wat ur askin but if ur sayin take the data from a local array and pass it into another array, to get a size 3 array from one to the other u could exit/endfunction with a value made with rgb(array(1),array(2),array(3)) then turn it back into the values with rgbr, rgbg, rgbb

sorry if thats useless

There are only 10 kinds of people in the world, those who understand binary and those who dont

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TheComet

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Posted: 10th May 2009 10:20

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Quote: "If I'm wrong about what you were trying, I apologize for assuming and you can just ignore this."

You are not that far, I am making a waypoint plugin. I want all of my commands in a nice dba file, so you can #include it into your main program and use simple commands like "load waypoints(file,object)" or "get waypoint angle x()". But for that to happen, the arrays have to be in all of the functions...

Quote: "not sure exactly wat ur askin but if ur sayin take the data from a local array and pass it into another array, to get a size 3 array from one to the other u could exit/endfunction with a value made with rgb(array(1),array(2),array(3)) then turn it back into the values with rgbr, rgbg, rgbb

sorry if thats useless"

That would be a good idea, but I am using values greater than 255 and smaller than 0, so I couldn't pass them with the rgb() command...

TheComet

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Libervurto

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Posted: 10th May 2009 16:00

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What is stored in the array?
You could do Smartguys idea by making your own stacked variable.

Riddle: The more you take, the more you leave behind. What are they? Answer

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TheComet

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Posted: 10th May 2009 17:42 Edited at: 10th May 2009 18:52

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I have 4 arrays (the only 4 in my plugin), and I store the x,y and z positions of the waypoints in 3 arrays as floats and the array data (values between 1 and infinite) in the other array as longs(I think).

TheComet

EDIT : They are stored in ram somewhere, right? Is there a way to access them directly? Or how about writing them to a memblock? How would I do that?

Peachy, and the Chaos of the Gems

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Libervurto

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Posted: 11th May 2009 01:37

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@TheComet
Have you used memblocks with bitmaps etc before?
You'd do it like that but write your own header...
In the header we need to store how many waypoints there are.
I'll write this as a DWORD so we can have thousands!
We could also define the memory required for each waypoint in the header to allow for differently scaled worlds but I'm just going to use DWORDS for that too. So that's 3 DWORDS for x, y and z (12 bytes).

+ Code Snippet

rem memblock header
max_waypoints = 20

rem make memblock using header (we add 4 bytes to include the header)
make memblock 1, 4 + max_waypoints*12

Ok that's the memblock set up. Now to read and write it we just use our references...

+ Code Snippet

n=5

rem reading waypoint n
way_x = memblock dword 1, 4 + n*12
way_y = memblock dword 1, 4 + n*12 + 4
way_z = memblock dword 1, 4 + n*12 + 8

I hope that works I haven't tested it.

Riddle: The more you take, the more you leave behind. What are they? Answer

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TheComet

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Posted: 14th May 2009 20:56

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Thanks obese! I'll try it out and let you know if it works!

TheComet

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DarkBASIC Discussion / Passing arrays from one function to the other