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<p>It may help if you visualize how a clock works. For the run method:</p>
<p><br>
</p>
<p> The minutes counts from zero to 60 (increment clock.minutes by 1)</p>
<p> When minutes reach 60 (if clock.minutes >= 60)</p>
<p> minutes are reset to zero (clock.minutes set value to 0)</p>
<p> increment clock.hours by 1</p>
<p> when hours reach 12 (if clock.hours >=12)</p>
<p> hours are reset to zero (clock.hours set value to zero)</p>
<p><br>
</p>
<p>That's the model of a clock. All you need to do for the view part is add a <br>
</p>
<p> "clock.minuteHand roll left 1/60" after the <span>increment clock.minutes by 1</span></p>
<p>and a "clock.hourHand roll left 1/12" after the <span>increment clock.hours by 1</span></p>
<p><span><br>
</span></p>
<p><span>finally add a "wait (waitTime seconds)" at the bottom of the clock.run edit window</span></p>
<p><span>where the waitTime variable is set to 60 for normal speed, 1 for 60 times normal speed, and 1/60 for 3600 times normal speed</span><br>
</p>
<p><br>
</p>
<p>All three variables should be created in the clock <b>properties </b>tab.</p>
<p>otherwise seconds is reset to zero every time clock.run is invoked.</p>
<p>(How do I know this? "you learn from mistakes")</p>
<p><br>
</p>
<p>The best way to have the clock "run" continuously is to</p>
<p>"create new event" "when the world starts" in the Alice 2 event area. <br>
</p>
<p>right-click change to "while the world is running"</p>
<p>then drag the clock "run" method onto the "during" part<br>
</p>
<p><br>
</p>
<p>The other methods and functions you mentioned would interact with the hours, minutes, and
<span>waitTime </span>variables as described in the requirements</p>
<p><br>
</p>
<p>I can make suggestions about them if you need help. Just email me at</p>
<p>robert.durtschi@gcsu.edu</p>
<p><br>
</p>
<p>Best</p>
<p>Bob Durtschi<br>
</p>
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<br>
Message: 1<br>
Date: Mon, 24 Oct 2016 15:50:08 -0400<br>
From: "Nichols, Denise" <dnichols@yorkcatholic.org><br>
To: alice-teachers@lists.andrew.cmu.edu<br>
Subject: alice-teacher Help Needed: Alice 2.4 Clock Project<br>
<br>
I am using the *Alice in Action* textbook written by Joel Adams. In<br>
Chapter 4 Flow Control, there is a programming project that my class and I<br>
just cannot figure out. I have the solution file, but we are not sure how<br>
it was coded. Does anyone have any suggestions?<br>
<br>
Here is the directions from the textbook:<br>
<br>
Programming Project 4.10<br>
>From the Alice Gallery, choose a clock class that has subparts for the<br>
minute and hour hands.<br>
<br>
a. Build a clock method named *run ( )* that moves the minute and hour<br>
hands realistically (that is, each time the minute hand compeltes a<br>
rotation, the hour hand should advance 1 hour). Define a parameter named<br>
*speedUp* that controls the duration of the hand movements, such that* run<br>
(0) *will make the clock run at normal speed, *run (60)* will make the<br>
clock run at 60 times its normal speed, run* (3600) *will make the clock<br>
run at 3600 its normal speed, and so on.<br>
<br>
b. Build a clock method *setTime(h, m)* that sets the clock's time to *h:m*<br>
(*m* minutes after hour *h*).<br>
<br>
c. Build three functions for your clock: one that returns its current time<br>
(as a *String*), one that returns its current hours value (as a *Number*),<br>
and one that returns its current minutes value (as a *Number*).<br>
<br>
d. Build a clock method *setAlarm (h, m) *that lets you set the clock's<br>
alarm to *h:m.* Then modify your *run( ) *method so that when the clock's<br>
current time is equal to *m* minutes after hour *h*, the clock plays a<br>
sound.<br>
<br>
Any ideas or suggestions would be appreciated. Thanks so much!<br>
<br>
Denise Nichols<br>
*Computer Teacher*<br>
*York Catholic High School*<br>
*dnichols@yorkcatholic.org <dnichols@yorkcatholic.org>*<br>
*717-846-8871*<br>
<br>
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