Redim an Array?

BlitzMax Forums/BlitzMax Beginners Area/Redim an Array?

Saxon1974

(Posted 2008) [#1]

Is there a way to redim an array in blitzmax? I have used it in other languages but Im not finding it here.

Basically I define this array when the program loads.

Global tiles:Int[GadgetWidth(MainCanvas.Tgad)/TILESIZE,GadgetHeight(MainCanvas.Tgad)/TILESIZE]

When the window gets resized it needs rerun or the array is the wrong size. Basically it just needs rerun after the resize of the window.

How would I do that?

Dreamora

(Posted 2008) [#2]

Check the documentation on Slicing

Perturbatio

(Posted 2008) [#3]

slices can only be done on single dimension arrays, however you can change it to be an array of arrays and then you can slice them.

*EDIT*
but you *should* be able to reassign the array variable to a new array:

Global TILESIZE:Int = 20
Global Height:Int = 100
Global Width:Int = 100

Global tiles:Int[Width/TILESIZE,Height/TILESIZE]
Print tiles[(width/TILESIZE)-1, (Height/TileSize)-1]
Height = 200
Width = 200
tiles = New Int[Width/TILESIZE,Height/TILESIZE]
Print tiles[(width/TILESIZE)-1, (Height/TileSize)-1]

Czar Flavius

(Posted 2008) [#4]

Something:Blah = New Blah[size, size] ?

ImaginaryHuman

(Posted 2008) [#5]

Local MyArray:Int[10]
Local MyArray2:Int[]=MyArray[..9]

To do multidimensional you have make a single dimensional array containing arrays and then slice each array.

TomToad

(Posted 2008) [#6]

If you don't need to retain the old data, you can use the New command

Global tiles:Int[GadgetWidth(MainCanvas.Tgad)/TILESIZE,GadgetHeight(MainCanvas.Tgad)/TILESIZE]
...
Select EventID()
   Case EVENT_WINDOWSIZE
      'This will destroy the old data, so the array needs to be reloaded or reinitialized
      tiles = New Int[GadgetWidth(MainCanvas.Tgad)/TILESIZE,GadgetHeight(MainCanvas.Tgad)/TILESIZE]
End Select

...

Perturbatio

(Posted 2008) [#7]

Hmmm... I think I might have posted in invisible ink...

tonyg

(Posted 2008) [#8]

Sorry to double-guess but if this is some sort of tilemap can't you have the array the maximum height/width you will allow and display the tiles with a loop from a start_xpos for how many tiles will fit in the window.
If I have jumped the gun I apologise.

Perturbatio

(Posted 2008) [#9]

Sorry to double-guess

I assumed it was for that too, but posited that it could also be for a tilemap editor that doesn't necessarily know the minimums and maximums.

Czar Flavius

(Posted 2008) [#10]

Perturbatio, use constansts instead of globals, faster :)

Perturbatio

(Posted 2008) [#11]

I know that already, but if tilesize needs to change, then constants are no use.