Get Transformation Matrix

[beuzel]

Hello,

Maya provides transformation information of an object as Transform Attributes with Translate, Rotate and Scale vectors. What I need is the Matrix. Is there any way do display the transformation/rotation matrix for the selected object?

Any help welcome
Chris

[joojaa]

yes, the data can be querried with getattr and xform.

[beuzel]

Hi,
Thanks, this prints out a formatted output of the selected object(s):

global proc printMatrix()
{
	// get all selected objects
	string $sel[] = `ls -sl -l`;
 
	for($obj in $sel)
	{
		// get object matrix, alternatively use "xform -q -m"
		float  $matrix[] = `getAttr $obj.matrix`;
		print("matrix for '" + $obj + "':\n");
 
		// write matrix to script editor
		for ($i=0; $i<16; $i++)
		{
			// limit to 4 digits after comma
			$value = (int)($matrix[$i] * 10000.0) / 10000.0;
 
			// equalize string length
			string $valueStr = (string)$value;
			int $len = size($valueStr);
			do
			{
				$valueStr = " " + $valueStr;
			}
			while (size($valueStr) < 8);
			print($valueStr);			
			print(" ");
 
			// line break after 4 values
			if ($i % 4 == 3)
			{
				print("\n");
			}
		}		
	}
}

Chris