Maya Scripting

MEL

import importlib
import sys
import bt_rigging_utility
#importlib.reload(bt_rigging_utility)


ver = sys.version.split(" ")[0][0]
python2 = False


if ver == "2":
    python2 = True

if python2: 
    reload (bt_rigging_utility)
else:
    importlib.reload(bt_rigging_utility)

bt_rigging_utility.main()


$my_Values[] = {1,2,3,4,5,6};
// You can access individual elements by numbers (starts with zero) (i.e $my_Values[2])
matrix $m[3][5] = <<1,2,3,4,5;6,7,8,9,10;11,12,13,14,15>>

// If/Else Block

if ( $a == $b) {
    ...
} else if ($a > $b) {
    ...
} else {
    ...
}

//Compare $a with the result of whether $b is greater than 10. 
//If true, then $c is used. 
//If false, then $c is subtracted by 10.
$a = ($b > 10) ? $c : ($c - 10);

//Basic for loop
int $i;
for ($i = 10; $i > 0; $i--) {
    print($i+"...\n");
}
print("Blastoff!!!");
string $arry[3] = {"red","green","blue"};

//Iterate through each k variable in arry
for ($k in $arry) {
    ...
}

// Procedures or Functions

global proc <return type> <name>(<arg list>) {
    ...
    return <exp>;
}
global proc float squareAndAdd(float $x, float $y) {
    return $x * $x + $y;
}
square(5.0, 2.0);
27


setAttr("mySphere1.translateX",10); // Function syntax
setAttr mySphere1.translateX 10; // Command syntax

$a = getAttr("mySphere.translateX"); // Function syntax
$b = `getAttr mySphere.translateY`; // Command syntax
// Do something on selected objects
string $sel[] = `ls -sl`;
for ($each in $sel){
    $rescale = $rescale + 1;
    scale $rescale $rescale $rescale $each;
}

// Execute a MEL file inside a procedure

global proc savePose(){
rehash;
eval ("source savePoseUI_DT.mel");
}
savePose;
// Creating Stairs
float $stepH = 4;
float $stepW = 24;
float $stepD = 8;
int $numSteps = 6;

for ($i = 0 ; $i < $numSteps ; ++$i) {
polyCube -h $stepH -w $stepW -d $stepD;
move -r 0 ($i * $stepH) ($i * $stepD);
}
\\ By default, MEL commands are in creation mode. Need specify query or edit mode on existing objects

polySphere -name "Fred"
polySphere -query -radius
polySphere -edit -radius 5 "Fred"

PyMEL

for x in ls( type='transform'):
    # object oriented design
    print x.longName()

    # make and break some connections
    x.sx.connect(x.sy)
    x.sx.connect(x.sz)

x.sx.disconnect()

# add and set a string array attribute with the histor
x.setAttr('newAt', x.getShape().history(), force=1)

Quirks