Get X,Y of a symbol inside another! (harder than it seems)

@tiagosaad 

Hi,

If you interested to get the coordinates of the inner element, you need to use matrix multiplication in order to take in consideration all random transformations over the outer containers. (rotation, scale, skew, etc). In the example below:

if you want to calculate the position of the red cross ( the registration point of the symbol at third level ), you should use the following:

var A = fl.getDocumentDOM().selection[0];                       // the element of the stage (selected)
var B = A.libraryItem.timeline.layers[0].frames[0].elements[0]; // element at the second level (hard coded)
var C = B.libraryItem.timeline.layers[0].frames[0].elements[0]; // element at the third level (hard coded)

var compMatrix = fl.Math.concatMatrix( C.matrix, B.matrix );
    compMatrix = fl.Math.concatMatrix( compMatrix, A.matrix );

fl.trace( "x:" + compMatrix.tx + ", y:" + compMatrix.ty  );

Try this code with the example file. Select the element on the stage and run the command - you should see printed out the coordinates of the red cross, translated to screen coordinates as they displayed in the "info" palette.

Here is the sample .FLA file

Cheers!