PixelSearch

[LuisGA]

Hello.

I have this little script, in which i use pixelsearch to search for a pixel that is changing constantly.

What im trying to do is to click on a certain spot of the screen when $greycoord[0] (coordinate X) is at the X coordinate 478 but i got this error.

C:\user\?????\?????\?????\test.au3 (30) : ==> Subscript used with non-Array variable.:

if $greycoord[0] = 478 Then

if $greycoord^ ERROR

Here is the script so far.

HotKeySet("{ESC}", "Terminate")

Func Terminate()

Exit 0

EndFunc

While (1)

$greycoord = PixelSearch( 295, 476, 785, 490, 0xB6B6B6, 0)

if $greycoord[0] = 478 Then

Sleep (1500)

MouseClick("left", 240, 484, 10, 0)

EndIf

WEnd

What can i do?.

[PsaltyDS]

Add some error handling. When PixeSearch() fails to find the color, it sets @error and doesn't return an array.

Try this:

If IsArray($greycoord) And ($greycoord[0] = 478) Then

Or this:

If (@error = 0) And ($greycoord[0] = 478) Then

Since the logic is tested left-to-right (outside of parens), when $greycoord is not an array (or error is set) the "And" is already false so no attempt is made to access $greycoord[0].

[LuisGA]

Add some error handling. When PixeSearch() fails to find the color, it sets @error and doesn't return an array.

Try this:

If IsArray($greycoord) And ($greycoord[0] = 478) Then

Or this:

If (@error = 0) And ($greycoord[0] = 478) Then

Since the logic is tested left-to-right (outside of parens), when $greycoord is not an array (or error is set) the "And" is already false so no attempt is made to access $greycoord[0].

I understand now thanks for the help, my script works now that i understand a little more about it.