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Great meeting today. <br>
<br>
Doug, I have a question based on Ron and Carl's presentations,
perhaps it has already been answered, to wit:<br>
<br>
As I understand, the line following course consists of an assembly
of square tiles, each of which has an entry and exit point.<br>
<br>
Is it sufficient for the robot to just identify the entry and exit
points, and drive directly from one to the other?<br>
<br>
That is, it would not follow the line per se, though with
sufficiently large robot the differences would probably be pretty
negligible, but it would follow the course.<br>
<br>
thanks,<br>
dpa<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/09/2017 08:18 AM, Doug Paradis
wrote:<br>
</div>
<blockquote
cite="mid:CAOdUW+ZWfu90FrpFwTy-0dxOP+PNMWKhdYkdr9Pv4FSYHa-6+w@mail.gmail.com"
type="cite">
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charset=windows-1252">
<div dir="ltr">John,
<div> Currently, the intersecting lines are always straight
and all intersections are 90 degrees. Curves lines at an
intersection would be a possible addition to further challenge
courses (interesting idea). The link to the course layout is
at </div>
<div><a moz-do-not-send="true"
href="https://www.dprg.org/wp-content/uploads/2017/11/DPRG-Roborama-2011b-Challenge-Level-LF-Course.pdf">https://www.dprg.org/wp-content/uploads/2017/11/DPRG-Roborama-2011b-Challenge-Level-LF-Course.pdf </a>
If you have any additional questions, let me know. I would
love to see your work on the tests that you are developing.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Dec 9, 2017 at 12:36 AM, John
Swindle <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:swindle@compuserve.com" target="_blank">swindle@compuserve.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><font
face="Arial, Helvetica, sans-serif" size="2" color="black">Doug,
<div><br>
</div>
<div>I'd say the crossing in your drawing was about either
30 degrees or 150 degrees, and since it could come in on
either side, I'd have to look for both. I am not asking
that the rules state which side the angle is measured
from. My issue is that I am developing a two-step test
that covers all the conditions in the Challenge, but in
the steps I need to include something that rejects the
intersections. I am OK with rejecting any line that is
70 degrees to 110 degrees on either side. If the
intersecting line is straight, the test is a bit more
robust. If each side is 70 to 110 degrees (a bent
intersecting line), my two-step test might fail.</div>
<div><br>
</div>
<div>Doing it "that's just wrong" way,</div>
<div>John Swindle</div>
<div>
<div class="h5">
<div><br>
<br>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: Doug Paradis <<a moz-do-not-send="true"
href="mailto:paradug@gmail.com" target="_blank">paradug@gmail.com</a>><br>
To: John Swindle <<a moz-do-not-send="true"
href="mailto:swindle@compuserve.com"
target="_blank">swindle@compuserve.com</a>><br>
Cc: DPRG <<a moz-do-not-send="true"
href="mailto:dprglist@lists.dprg.org"
target="_blank">dprglist@lists.dprg.org</a>><br>
Sent: Fri, Dec 8, 2017 11:52 pm<br>
Subject: Re: LF intersection angle rule<br>
<br>
<div
id="m_-2867064402782409486AOLMsgPart_2_81c7d011-0908-4c74-95cc-d249b881afbf">
<div
class="m_-2867064402782409486aolReplacedBody">
<div dir="ltr">John,
<div> In the challenge course, all the
intersections are 90 degrees. The rule was
written to allow crossing variations in
the future. I'm thinking that 70-90
degrees would represent the smallest angle
of the intersection. I not sure that is
right, just the way I would interpret the
angle. </div>
<div>if you saw an intersection that was
like this:</div>
<div> | /</div>
<div> | /</div>
<div> /</div>
<div> / |</div>
<div> / |</div>
<div> / |</div>
<div><br>
</div>
<div>What angle would you say the
intersection was? </div>
<div><br>
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
<div
class="m_-2867064402782409486aolmail_gmail_extra"><br>
<div
class="m_-2867064402782409486aolmail_gmail_quote">On
Fri, Dec 8, 2017 at 9:03 PM, John Swindle
<span dir="ltr"><<a
moz-do-not-send="true" rel="noopener
noreferrer"
href="mailto:swindle@compuserve.com"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:swindle@compuserve.com">swindle@compuserve.com</a></a>></span>
wrote:<br>
<blockquote
class="m_-2867064402782409486aolmail_gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex"><font
face="Arial, Helvetica, sans-serif"
size="2" color="black">
<div>
<div>Doug,</div>
<div> </div>
<div>The Line Following Challenge
rules say "Intersections may cross
with angles of 70 - 90 degrees."
Doesn't that really mean 70 to 110
degrees? Is the intersecting line
straight, or can it bend at the
intersection?</div>
<div> </div>
<div>Thanks,</div>
<div>John Swindle</div>
<div> </div>
<div
style="color:black;font-family:arial,helvetica;font-size:10pt"><br>
</div>
</div>
</font></blockquote>
</div>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
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</font></blockquote>
</div>
<br>
</div>
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