Confused about some syntax

Akuma no Houkon · Post by **Akuma no Houkon** » Fri Dec 05, 2003 10:51 pm

Why doesnt the following work, is it not supported or am I doing something wrong.

Structure Bob
   One.b
   Two.b
   Three.b
   Four.b
EndStructure

Structure Fred
   AllBobs(10,10).Bob
EndStructure

I am still not used to some of the syntax that PureBasic uses

Saboteur · Post by **Saboteur** » Fri Dec 05, 2003 11:12 pm

You can't declare an array into a structure. Arrays are global, and must be declared with Dim.

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Dim AllBobs.Bob(10,10)

Pupil · Post by **Pupil** » Fri Dec 05, 2003 11:29 pm

arrays inside structures are static, so you can't redim them later and as far as i know only one-dimensional arrays are supported. so your stucture would translate to something like this:

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Structure Bob
   One.b
   Two.b
   Three.b
   Four.b
EndStructure

Structure InterMidiateFred
   Bob2.Bob[10]
EndStructure

Structure Fred
  Bob1.InterMidiateFred[10]
EndStructure

a.Fred
a[1]\Bob2[1]\One ; example of accessing one item in structure

Oh, and in structures you actually get the amount of items you set inside the brackets not the set value plus one, like you do when using 'Dim'.

Akuma no Houkon · Post by **Akuma no Houkon** » Mon Dec 08, 2003 9:59 pm

Well what I have is the following:

I have an array of 2d arrays...images would be the easiest reference. say I have a 32x32 icon, I have 50 of these, and I want to store the pixel information so I can access it via:

Icon(#)\Pixel(x,y)\Red

What would be the easiest way to accomplish this within the PureBasic structure?

The "images" are always a fixed size, and always the same size.

I "might" be able to restructure my system to use a 1d array of longs rather than a 2d array of bytes, but that would not be the ideal situation given the choice.

freedimension · Post by **freedimension** » Mon Dec 08, 2003 11:52 pm

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Structure Rows
  Y.l[50]
EndStructure

Structure Icon
  X.Rows[50]
EndStructure

a.Icon

a\X[20]\Y[30] = $FF00FF

If it's not speed you're interested in (i.e. it doesn't matter) you can sort of simplify it by simply creating procedures. This enhances human readability a little bit.

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Procedure GetIconPixel(*a.Icon, x, y)
  ProcedureReturn *a\X[x]\Y[x]
EndProcedure
Procedure SetIconPixel(*a.Icon, x, y, value)
  *a\X[x]\Y[y] = value
EndProcedure

SetIconPixel(*a, 20, 30, $FF00FF)
GetIconPixel(*a, 20, 20) ; would return $FF00FF