[Dprglist] LF intersection angle rule

[Doug Paradis]

John,
    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
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>
If you have any additional questions, let me know. I would love to see your
work on the tests that you are developing.

Regards,
Doug P.

On Sat, Dec 9, 2017 at 12:36 AM, John Swindle <swindle at compuserve.com>
wrote:

> 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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