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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">The book "An Introduction to Programming Using Alice 2.2 Second Edition" by Charles W. Herbert has a rather nice collision detection method in Chapter 10: "TUTORIAL 10B—DON'T SPLASH
THE PENGUIN!"<br>
<br>
I'll see if I can paste the relevent code here:<br>
<br>
<p></p>
<img style="WIDTH: 560px; HEIGHT: 205px" title="don't splash the penguin fig 10-11.png" src="cid:7f31b7cb-8e93-4dcc-95e5-14d80edf775e" originalWidth="567" originalHeight="208" rszImgCmd="fitToWindow">
<p></p>
<p><br>
This is a screenshot of what the playing field looks like. The goal is to manuever the penquin past the holes to the flag. The collison dectection code checks if the penguin is within 1.1 meter of the center of each hole in the list; within 1/2 meter of the
flag; or if trying to go through the snowbank surrounding the arena. </p>
<p> </p>
<p>It rather cleverly defines the snowBank as a donut with the center in the center of the playing field. so the check is to see if the penguin is 10.5 meters from the
<strong>center</strong> of the snowBank boundry </p>
<p> </p>
<p>We found that if one didn't use a "Do together" it was possible for the penguin to beat its way through the snowbank and disappear over the horizon.</p>
<p> </p>
<p>the check is invoked by a runtime event:</p>
<p> </p>
<p>
<table style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; WIDTH: 100%; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; mso-cellspacing: 0in; mso-border-alt: solid silver .75pt; mso-yfti-tbllook: 1184; mso-padding-alt: 1.5pt 1.5pt 1.5pt 1.5pt" class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" width="100%">
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<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">While the world is running</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
<o:p></o:p></span></p>
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<p style="TEXT-ALIGN: right; LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal" align="right">
<b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Begin:</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
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<td style="BORDER-BOTTOM: silver; BORDER-LEFT: silver; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 100%; PADDING-RIGHT: 1.5pt; BACKGROUND: #cbe7ec; BORDER-TOP: silver; BORDER-RIGHT: silver; PADDING-TOP: 1.5pt" width="100%">
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<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; BACKGROUND: #f0f0ff; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><None></span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<o:p></o:p></span></p>
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<td style="BORDER-BOTTOM: silver; BORDER-LEFT: silver; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cbe7ec; BORDER-TOP: silver; BORDER-RIGHT: silver; PADDING-TOP: 1.5pt">
<p style="TEXT-ALIGN: right; LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal" align="right">
<b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">During:</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
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<table style="WIDTH: 100%; mso-cellspacing: 0in; mso-yfti-tbllook: 1184; mso-padding-alt: 1.5pt 1.5pt 1.5pt 1.5pt" class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="100%">
<tbody>
<tr style="mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #ffe6b4; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-alt: solid silver .75pt">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">World.checkPenguinLocation</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
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<tr style="mso-yfti-irow: 3; mso-yfti-lastrow: yes">
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<p style="TEXT-ALIGN: right; LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal" align="right">
<b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">End:</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
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<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; BACKGROUND: #f0f0ff; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><None></span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
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</p>
<p> </p>
<p>The first check below: <b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">For all</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<b><span style="BACKGROUND: #f0f0ff">hole1.holes</span></b> <b>, every</b> <b>item_from_holes</b>
<b>together</b></span>" runs through the list of holes. If the penguin is less than 1.1 meter from the center of any of the holes it pops up a "splash" billboard that covers the screen.</p>
<p> </p>
<p>The second check <span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<strong>If</strong></span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"> (
<b><span style="BACKGROUND: #f0f0ff">penguin</span></b> <b>is at least <span style="BACKGROUND: #f0f0ff">
10.5 </span></b><span style="BACKGROUND: #f0f0ff">meters</span> <b>away from <span style="BACKGROUND: #f0f0ff">
snowBank</span></b> ) <font size="2" face="Tahoma">checks if the penguin is too far from the center of the snowbank donut (center of the playing field) and moves it back towards the center.</font></span></p>
<p><font face="Tahoma"><font size="2"><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"></span></font></font> </p>
<p><font face="Tahoma"><font size="2"><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">The third checks
<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<strong>If</strong></span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"> ( (
<b><span style="BACKGROUND: #f0f0ff">penguin</span></b> <b>distance to <span style="BACKGROUND: #f0f0ff">
flagpole</span></b> ) <b><</b> <b><span style="BACKGROUND: #f0f0ff">0.5</span></b> )
<font size="2" face="Tahoma">when the penguin is close enough to the goal. It then invokes another method to indicate "Victory"</font></span></span><br>
</p>
</font></font>
<p>
<table style="WIDTH: 100%; mso-cellspacing: 0in; mso-yfti-tbllook: 1184; mso-padding-alt: 1.5pt 1.5pt 1.5pt 1.5pt" class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="100%">
<tbody>
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<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #ffffd2; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-top-alt: solid silver .75pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="4">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">World.checkPenguinLocation</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
( ) <br>
<i>No variables</i><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 1">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #eeddff; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-top-alt: solid silver .75pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="4">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Do together</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 2">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #eeddff; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" rowspan="14" width="20">
</td>
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #f8ddff; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-top-alt: solid silver .75pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="3">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">For all</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<b><span style="BACKGROUND: #f0f0ff">hole1.holes</span></b> <b>, every</b> <b>item_from_holes</b>
<b>together</b><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 3">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #f8ddff; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" rowspan="5" width="20">
</td>
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-top-alt: solid silver .75pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="2">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">If</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
( ( <b><span style="BACKGROUND: #f0f0ff">penguin</span></b> <b>distance to <span style="BACKGROUND: #f0f0ff">
item_from_holes</span></b> ) <b><</b> <b><span style="BACKGROUND: #f0f0ff">1.1</span></b> )
<o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 4">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt" rowspan="2" width="20">
</td>
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 100%; PADDING-RIGHT: 1.5pt; BACKGROUND: #ffe6b4; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-alt: solid silver .75pt" width="100%">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; BACKGROUND: #f0f0ff; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">penguin</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<b>move <span style="BACKGROUND: #f0f0ff">down</span></b> <b><span style="BACKGROUND: #f0f0ff">5
</span></b><span style="BACKGROUND: #f0f0ff">meters</span> <span style="BACKGROUND: #f0f0ff">
duration = <b>0.25 </b>seconds</span><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 5">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 100%; PADDING-RIGHT: 1.5pt; BACKGROUND: #ffe6b4; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-alt: solid silver .75pt" width="100%">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; BACKGROUND: #f0f0ff; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">splash</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<b>set opacity</b> <b>to <span style="BACKGROUND: #f0f0ff">1 (100%)</span></b><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 6">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="2">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Else</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 7">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" width="20">
</td>
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-right-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><i><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Do Nothing
</span></i><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 8">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-top-alt: solid silver .75pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="3">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">If</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
( <b><span style="BACKGROUND: #f0f0ff">penguin</span></b> <b>is at least <span style="BACKGROUND: #f0f0ff">
10.5 </span></b><span style="BACKGROUND: #f0f0ff">meters</span> <b>away from <span style="BACKGROUND: #f0f0ff">
snowBank</span></b> ) <o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 9">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt" width="20">
</td>
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 100%; PADDING-RIGHT: 1.5pt; BACKGROUND: #ffe6b4; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-alt: solid silver .75pt" width="100%" colspan="2">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; BACKGROUND: #f0f0ff; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">penguin</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
<b>move </b><span style="BACKGROUND: #f0f0ff">amount = <b>1 </b>meter</span> <b>toward
</b><span style="BACKGROUND: #f0f0ff">target = <b>snowBank</b></span> <span style="BACKGROUND: #f0f0ff">
duration = <b>0 </b>seconds</span> <span style="BACKGROUND: #f0f0ff">style = <b>abruptly</b></span><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 10">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="3">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Else</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 11">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" width="20">
</td>
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-right-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" colspan="2">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><i><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Do Nothing
</span></i><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 12">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-top-alt: solid silver .75pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="3">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">If</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">
( ( <b><span style="BACKGROUND: #f0f0ff">penguin</span></b> <b>distance to <span style="BACKGROUND: #f0f0ff">
flagpole</span></b> ) <b><</b> <b><span style="BACKGROUND: #f0f0ff">0.5</span></b> )
<o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 13">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt" width="20">
</td>
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 100%; PADDING-RIGHT: 1.5pt; BACKGROUND: #ffe6b4; BORDER-TOP: silver 1pt solid; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-alt: solid silver .75pt" width="100%" colspan="2">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">World.reachedFlagpole</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 14">
<td style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-right-alt: solid silver .75pt" colspan="3">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Else</span></b><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
<tr style="mso-yfti-irow: 15; mso-yfti-lastrow: yes">
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: silver 1pt solid; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; WIDTH: 15pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0; PADDING-TOP: 1.5pt; mso-border-left-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" width="20">
</td>
<td style="BORDER-BOTTOM: silver 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-RIGHT: 1.5pt; BACKGROUND: #cceedd; BORDER-TOP: #f0f0f0; BORDER-RIGHT: silver 1pt solid; PADDING-TOP: 1.5pt; mso-border-right-alt: solid silver .75pt; mso-border-bottom-alt: solid silver .75pt" colspan="2">
<p style="LINE-HEIGHT: normal; MARGIN: 0in 0in 0pt" class="MsoNormal"><i><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'">Do Nothing
</span></i><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<br>
________________________________________<br>
From: alice-teachers-bounces+robert.durtschi=gcsu.edu@lists.andrew.cmu.edu [alice-teachers-bounces+robert.durtschi=gcsu.edu@lists.andrew.cmu.edu] on behalf of alice-teachers-request@lists.andrew.cmu.edu [alice-teachers-request@lists.andrew.cmu.edu]<br>
Sent: Thursday, September 05, 2013 12:00 PM<br>
To: alice-teachers@lists.andrew.cmu.edu<br>
Subject: alice-teachers Digest, Vol 38, Issue 2<br>
<br>
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Today's Topics:<br>
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1. Collision and walking speed questions (Lori Fuller)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Wed, 04 Sep 2013 13:46:25 -0400<br>
From: "Lori Fuller" <lori.fuller@browardschools.com><br>
Subject: alice-teacher Collision and walking speed questions<br>
To: alice-teachers@lists.andrew.cmu.edu<br>
Message-ID:<br>
<fc.0119ec0746d675b63b9aca00e8ed6537.46d6890f@browardschools.com><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
I have an advanced student among all of my beginners... and he is working<br>
on a maze game.<br>
2 questions:<br>
1. In Alice 2.3, is it possible to set up a collision indication method?<br>
If so, where do I find information on this?<br>
2. Is there a way to slow down the person object walking while using the<br>
arrow keys as controllers?<br>
<br>
<br>
<br>
thanks,<br>
<br>
Lori Fuller, M.Ed.<br>
Monarch High School<br>
Career Technology Department Head<br>
Technology Coordinator<br>
Asst. Athletic Director<br>
<br>
"A posse ad esse", from possibility to actuality...<br>
<br>
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