[Dprglist] LF intersection angle rule

[John Swindle]

Doug,


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.


Doing it "that's just wrong" way,
John Swindle



-----Original Message-----
From: Doug Paradis <paradug at gmail.com>
To: John Swindle <swindle at compuserve.com>
Cc: DPRG <dprglist at lists.dprg.org>
Sent: Fri, Dec 8, 2017 11:52 pm
Subject: Re: LF intersection angle rule



John,
    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.  
if you saw an intersection that was like this:
           |   /
           | /
           /
         / |
        /  |
       /   |


What angle would you say the intersection was? 


Regards,
Doug P.



On Fri, Dec 8, 2017 at 9:03 PM, John Swindle <swindle at compuserve.com> wrote:


Doug,
 
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?
 
Thanks,
John Swindle
 







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