Global Variables Declared Within Procedures

[atilla99]

I am not sure I understood the way global variables work. When I define a global variable in the scope of a procedure I can't access it from other procedures even though It's global. Let's say;

global proc test()
{
global float $testx = 1.2;
}

global proc test2()
{
print $testx;
}

Maya says $testx is an undeclared variable. Where did I make mistake really? Or that's how it works? Should I define global variables only in the root scope?

[gmask]

CODE
global float $testx;

global proc test()
    {
    $testx = 1.2;
    }

global proc test2()
    {
    print $testx;
    }

anythigninside brackets will be contained within it's scope unless you declare the variable outside of it first

[joojaa]

Well you can do that but should not. This si kindof important.

first

global float $testx = 1.2;

is not a assignment its a initialization. It will never ever get run a second time no maya how often you call test() just once if you wish to do it every time calling test you must do:

CODE
global proc test()
{
    global float $testx;
    $testx = 1.2;
}

if you were to do:

CODE
global float $testx = 1.2;
global float $testx = 1.4;

then maya would just consider the value 1.2. Unless ofcourse $testx was declared elsewhere allready in wich cas eit would have that value.

Second globals do not pierce automatically into all functions. The file or scope you use must declare it. Gmasks way works but only within the same file. Its a protection mechanism so that using global $veryCommonVarName doesnet automatically penetrate into all functions as a global causing ulntold damage. Preferably you'd always call it inside your scope just to be sure you get what you want.

[atilla99]

Thank you guys.

QUOTE(gmask @ 06/11/09, 07:37 AM) [snapback]309320[/snapback]
CODE
global float $testx;

global proc test()
    {
    $testx = 1.2;
    }

global proc test2()
    {
    print $testx;
    }

anythigninside brackets will be contained within it's scope unless you declare the variable outside of it first

Hmm. Your code also gives the error "$testx is an undeclared variable" though.

[gmask]

oh yeah.. it has to be like this..

CODE
global float $testx;

global proc test()
    {global float $testx;
    $testx = 1.2;
    }

global proc test2()
    {
global float $testx;
    print  $testx;
    }

test();
test2();