Say I have a line drawn with several edges using Shape.graphics' moveTo() and lineTo() methods. Can I modify one of these edges later? so for example:
var line:Shape = new Shape();
line.graphics.lineStyle(2, 0x000000, .75);
line.graphics.moveTo(10,10);
line.graphics.lineTo(50,50); // Can I modify coordinates of the edge created on this line?
NO, you can't. Once drawn there is no reference to the lines, so you can't modify them. You need to clear the graphics and redraw again.