PureBasic Forums - English

Posted: **Sat Apr 16, 2005 11:51 pm**

how do i pass an array to a procedure? i want to access all the float numbers i got in an array how can i pass the array to the procedure? i tried with @value at the procedure values but it gave me an error when trying to compile

Posted: **Sun Apr 17, 2005 12:06 am**

Is this to a dll? Because otherwise, all arrays are global in PB. You can just access it like normal within your procedure. No need to pass anything.

Posted: **Sun Apr 17, 2005 12:09 am**

i have an array with 4 values, they are color values (r,g,b etc). floats.

i have a procedure which needs the array to be passed because inside the procedure i call a dll which needs the array info (the colors).

i cant seem to pass the array correctly. my color is taken as green although what im sending is red.. and even if i have 0,0,0 its green anyway, i think im sending the pointer or something. how can i work arround this? is it even possible? how can i "fake" the array to the dll if not?

thanks!!!!

Posted: **Sun Apr 17, 2005 12:22 am**

I did it !!!

thanks anyway !

Posted: **Sun Apr 17, 2005 12:23 am**

I don't know if I got your question right but maybe this helps (?)

Code: Select all

Procedure showArray(*array.l)
  For i=0 To 10
    Debug PeekB(*array) ; PeekW(), PeekL(), PeekF()
    *array+1  ; +2, +4
  Next 
EndProcedure

Dim myArray.b(10)
For i=0 To 10
  myArray(i) = Random($FF)
Next

For i=0 To 10
  Debug myArray(i) 
Next

showArray(@myArray())

I guess there will be more elegant ways for sure...

EDIT: Ah... too late again... didn't see your last response.

Posted: **Sun Apr 17, 2005 12:31 am**

but if I use a for then I must call the dll function many times? this wont work!

and i managed to make it work but somehow it might be sending integers or something because i cant seem to mix the values, if i send 1,0,0 i get full red, thats ok ! but if i send 0.1,0,0 i still get full red! weird!!! if i send 0.1,0.1,0.5 i dont get a blueish color at all, its white!.

this is like what im doing:

Code: Select all

;my array
Dim Color.f(4)
  Color(0) = R.f
  Color(1) = G.f
  Color(2) = b.f
  Color(3) = 0.0
  

;this is my function
Procedure MyFunction(*value.f )
  Dim TempArray.f(4)
  TempArray() = *value.f
  CallFunctionFast(*thefunction,  TempArray() )

EndProcedure

;now im calling my function
MyFunction(  Color() )

Posted: **Sun Apr 17, 2005 12:37 am**

Now that I see what you're up to, why don't you simply pass the pointer on?
I mean, an array is nothing else than an "easy to handle memoryarea".

BTW: You're working with pointers here, a pointer can't be a float.
It should be MyFunction(*value.l).

Posted: **Sun Apr 17, 2005 12:37 am**

looks like the dll function is not recieving the floats or something (yes im saying this again because i think its happening). does anyone know what could be causing this mess?? the values dont get "mixed"

(the colors are plain colors, even if I call 0.5,0.0,0.1 I dont get the desired color).

Posted: **Sun Apr 17, 2005 12:38 am**

oh didnt see your post.
if i do that will the values remain floats and be passed like floats and everyone will be happy? (ill go test).

edit: no it doesnt work still

Posted: **Sun Apr 17, 2005 2:12 am**

can someone help me with this?

Posted: **Sun Apr 17, 2005 10:48 pm**

Are you sure the colour array you are using should be 'float' types?

I only ask because colours are normally represented by 'long' datatypes.

I'm probably barking up the wrong tree completely!

Posted: **Sun Apr 17, 2005 11:05 pm**

doodlemunch:

What DLL is that you're using?
Does it work outside your procedure, like

Code: Select all

CallFunctionFast(*thefunction,  @yourArray())

?

If it does, it should also work like this from your procedure:

Code: Select all

Procedure MyFunction(*colorArray.l )
  CallFunctionFast(*thefunction,  *colorArray)
EndProcedure

There's no need to copy the values to a new array.

srod wrote:I only ask because colours are normally represented by 'long' datatypes.

Hmm... last time I checked, OpenGL and DirectX were considered 'normal'.
Both are using floats as color-values

SCNR

Posted: **Sun Apr 17, 2005 11:22 pm**

Ah, not a great one for graphics me! Was talking with experience of PB and basic GDI only. Just making sure the problem was nothing obvious; usually is in my case!

I second your comments about the arrays and their being no need to copy the elements across to a new array etc.

Posted: **Sun Apr 17, 2005 11:25 pm**

srod wrote:Just making sure the problem was nothing obvious; usually is in my case!

You know I justed wanted to banter you about this

Posted: **Sun Apr 17, 2005 11:35 pm**

I consider myself well and truly 'bantered' on that score!