Transform Matrix and BitmapData

programming flash
1

I’m trying to take a snapshot from a picture and this snapshot will depends of a movie clip that represents a digital camera display.

I use the Draw method with a matrix to apply the modifications to the final image.

But I don’t seem to be able to find the exact values I should put, because the movie clip is a movable one, and translation will change depending on it’s _x and _y coordinates.

Any help ?

[AS]
snapshot = new BitmapData(follow._width, follow._height); // Creating a new BitmapData with the digital camera display height and width
var m:Matrix = photo1_mc.transform.matrix; // Taking the transform matrix from the photo that I wish to manipulate

	m.tx =- follow._x+x1; // I don't know the exact value to put here. What amount of translation ?
	m.ty = -follow._y+x2;
	


snapshot.draw(photo1_mc, m); // Drawing the image using the m matrix
capture_mc.attachBitmap(snapshot, 1);

[/AS]
I could find some values by trial and error but this sounds too desperate to me.