I inherited a two-week-old touch-screen computer, after my dad decided he didn't like the shininess of the screen. I agree that the screen is annoying, acting like a mirror, instead of the normal matte finish of other monitors.
No matter. I put up with it, because it's a 23" Acer touchscreen all-in-one computer running the awful Windows 8. I figured I could put it to use for my writing work; it gets added to other computers I have purchased solely for writing about software, such as the Apple Mac Mini.
(This new Acer has a secondary HDMI input, meaning I can use its screen for the Mac Mini that sits next to it.)
First software I installed was AutoCAD, for I was curious to see what it would be like with a touch screen. My understanding is that Windows 8 interprets my touches on the screen as if there were mouse inputs (but I could be wrong); this lets any program react to touches. In particular, I was curious about what kinds of touches were necessary to make AutoCAD work.
I started the Line command, and found...
...tap once to indicate the start of the line segment
...and then tap a second time to show the end of the line segment.
As on Android and other tablets, the (relatively) fat pointing finger gets in the way of seeing what's going on in the drawing precisely where I am working. But it works.
Same for the Circle command: one tap to indicate the center, a second tap to indicate the radius -- always vaguely, because I couldn't see under my finger.
Selection works when no command is active. I tap once in a blank area to start rectangular selection, and then again to define the rectangular area.
Tapping an object selects the object.
I then tried my hand at grips editing, but this barely worked. The problem I had was accurately selecting any blue grip to make it hot (red), which then would allow me to manipulate it. But it took me repeated taps to get a grip to turn red, and soon I tired of the exercise. I suppose one solution is to increase the size of grips.
By this time, my arm was getting sore from holding it in the air.
Before giving up, though, I did want to try panning and zooming...
...pinch two fingers to zoom in, and spread the fingers to zoom back out.
...drag two fingers to pan the drawing.
Right-clicking is not available, at least not that I was able to find. I tried double-tapping; no do. I tried a long-press (the standard for right-clicking on Android touch screens); no go. So I was unable to access shortcut menus.
I was unable to rotate the drawing in 3D, even using up to four fingers at a time. (The Asus screen supports up to ten fingers at a time, as do most touch screens today).
I was wondering why Autodesk was not trumpeting AutoCAD working with Windows 8 and touchscreens at Autodesk University, and now I know why. The problems are the pain (holding up the arm in the air) and the lack of accuracy (can't see what's happening in the most important part of the drawing, under my finger).
A touch screen is fine for closing dialog boxes or panning the drawing. But that's not enough of a reason to get such a screen for CAD.