» Fri Jun 22, 2012 9:38 pm
I didn't say you NEED full arm movement. Just, when you look at the basics, it provides the most control.
I'm sorry if I'm boring you with a dead topic, but I think we're talking about two different things.
With a mouse, your fingers ( mostly ) don't control the movement of the mouse, the mouse is moved over a large area with your arm and it is usually at an effective ( hardware dpi * in game sensitivity ) lower DPI.
With a trackball, at least 3 of your fingers move independently over the balls surface to control its movement, the trackball moves by a small amount while your hand and arm remain fixed and you are usually at the highest effective DPI.
So, if we are to compare we should break the subject of aiming with an appendage down to its basic level : degrees of freedom.
With a controller you have 4 degrees of freedom from the main thumb joint, and 1 other from the remaining joint on the thumb for a total of 5 degrees of freedom.
With a mouse you have 4 degrees of freedom for your shoulder, 1 for the elbow, and 4 for your wrist for a total of 9.
With a trackball, assuming you don't use your arm at all, you have 4 degrees of freedom for your wrist, and assuming for the moment you use only 1 finger, 4 degrees of freedom for your knuckle joint plus 2 others for the remaining joints for a total of 10.
Now, I'm not saying that the mouse or trackball are any better than each other, just that when one uses each well, they're of equal precision. Obviously the controller has much less precision with only 5 degrees of freedom.
jdb2