Assignment for Tue 10/6:
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(1) Read the introduction and Chapters 1-2 from Asimov's _I, Robot_ collection.

Consider the questions below, and be prepared to discuss the stories.  Everyone will
be expected to partiticipate and will receive a score based on their contribution to
our in-class discussion.

-What kind of groups or organizations might be opposed to Robots?
-Why does Robbie always want Gloria to tell him the story of Cinderella?
-What would you guess is Asimov's position on humanity and its future?
-Describe the relationship between robots and humans as portrayed in the stories.  What
sorts of details support your hypothesis?

Think of other interesting questions as you are reading.

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-We talked a little more about the lejos API
-We talked about how variables and object variables work (how they differ):

 // variables with a fundamental data type are simply like a box which stores a value
 int x = 2; // create variable x and store binary representation of "2" in it
 boolean b = true; // create variable b and store binary representation of "true" in it

 // object variables don't quite work the same way
 TouchSensor ts; // create a variable which will eventually hold a reference to an object
 ts = new TouchSensor(SensorPort.S1); // actually create a TouchSensor object and store reference to it

 The variable ts does not actually contain the TouchSensor object created by "new," but rather it
 stores a reference to it.  The analogy is that if you get a package, your post office box will not
 contain the actual packge, but a reference to it (e.g. a note telling you where you may pick it up).

-We finished our USTest program, which tests the ultrasonic sensor
-It turned out that displaying a simple continuous reading of the US sensor
 is nontrivial, and we encountered several hurdles
 -The first hurdle was that the US only works properly on ports 1-3; port 4 is special
 -The second was that we saw something like the following on the LCD:

  255
  205
  195
  325

  The numbers were much larger than we expected (and always ended in 5)
 -It turned out that the last "5" from the 255 wasn't being erased, so that 20 showed up as 205
  -We fixed this by using the LCD.clear() method
 -Next we barely saw anything but brief flashes on the screen
  -It turned out the numbers were being displayed too quickly, so we added a delay:

   drawInt(dist, 0, 3); // draw value of dist on line 3
   LCD.clear(); // clear display
   Thread.sleep(200) // wait 200 ms = 1/5 second

 -Next we saw nothing; it turned out that we added our delay in the wrong place

  drawInt(dist, 0, 3); // draw value of dist on line 3
  Thread.sleep(200) // wait 200 ms = 1/5 second
  LCD.clear(); // clear display

  We need to pause before we clear the display, so we have time to see the value of dist.

-Finally we broke up into groups of 2 and had a quiz.