Adobe Extending Flash Professional CS5 - Manual (Page 361)

339 EXTENDING FLASH PROFESSIONAL
Math object
Last updated 5/2/2011
Math.invertMatrix()
Availability
Flash MX 2004.
Usage
Math.invertMatrix(mat)
Parameters
mat Indicates the Matrix object to invert (see Matrix object ). It must have the following fields: a , b , c , d , tx , and ty .
Returns
A Matrix object that is the inverse of the original matrix.
Description
Method; returns the inverse of the specified matrix.
Example
The following example stores the currently selected object in the
elt variable, assigns that matrix to the mat variable,
and stores the inverse of the matrix in the inv variable:
var elt = fl.getDocumentDOM().selection[0];
var mat = elt.matrix;
var inv = fl.Math.invertMatrix( mat );
Math.pointDistance()
Availability
Flash MX 2004.
Usage
Math.pointDistance(pt1, pt2)
Parameters
pt1, pt2 Specify the points between which distance is measured.
Returns
A floating-point value that represents the distance between the points.
Description
Method; computes the distance between two points.