CGTalk - help a MEL newbee

dan1el

06-22-2007, 06:09 AM

I want to make a function an if/else function.

I wrote this but it doesn't work

//Inputs
float $a=GearTrain_Driver_1.rotateX*(Spur_GearMain_GrpN_1.RotateSpeed*.5)-108.5;

//Function
{
String $b;

if (big_lever.Engaged==0)
$b=$a
else
$b=0;
return $b;
}

//Result
Spur_GearMain_GrpN_2.rotateX=$b;

the input and the result part works by itself, there is something wrong with my function part, but what it's rather simple I would say.

nier

06-22-2007, 04:50 PM

Don't know if you really typed this way, or if this was just some parts of your code, but this would never work this way... the syntax is all wrong...

correct way would be:
//Function
proc string find_b(string $a){
string $b;
if (big_lever.Engaged==0){
$b=$a;
}else{
$b=0;
}
return $b;
}

//Inputs
float $a=GearTrain_Driver_1.rotateX*(Spur_GearMain_GrpN_ 1.RotateSpeed*.5)-108.5;
//Result
string $b = find_b($a);
//then you can use in your setAttr function the value of $b...
setAttr -e Spur_GearMain_GrpN_2.rotateX $b;

try it out....

Daniel

trancor

06-22-2007, 05:45 PM

Don't know if what nier said worked, but this line -

float $a=GearTrain_Driver_1.rotateX*(Spur_GearMain_GrpN_ 1.RotateSpeed*.5)-108.5;

is probably causing your problems, you need to get attr before you can just call it up in code.

$geartrainRotateX=`getAttr GearTrain_Driver_1.rotateX`;
$spurRotateSpd=`getAttr Spur_GearMain_GrpN_ 1.RotateSpeed`;
float $a=$geartrainRotateX*($spurRotateSpd*.5)-108.5;

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