NQC ("Not Quite C") : 1279


Robotics / RCX / NQC / 1279	1278 \| 1280

Subject:	Re: How to read the touch sensors on the Scout in NQC?
Newsgroups:	lugnet.robotics.rcx.nqc, lugnet.robotics.scout
Date:	Sun, 16 Dec 2001 18:49:16 GMT
Viewed:	5447 times

Hi Chris, Chris Barker <chris@superfami.com> writes: > > #1 if ((SensorValueRaw(1) & SensorValueRaw(0)) != 255) this is a bit crazy, unless your sensor value is a bit pattern. > #2 if ((SensorValueRaw(1) != 255) || (SensorValueRaw(0) != 255)) This is sensible, but are you sure it's ok to use equality and not inequalities like SensorValueRaw(1) < 240? > Number two is obvious but rather verbose, number one is just wierd! but it's equivalent, also in C, where & is bitwise and. > Since I'm accustomed to Perl which allows extreme lazyness I would have > thought that I could just do this: > > if ((SensorValueRaw(1) || SensorValueRaw(0) != 255)) > > But that does not work. Is this normal in NQC? Fortunately. Jürgen "who thinks Perl is an abomination" -- Jürgen Stuber <stuber@loria.fr> http://www.loria.fr/~stuber/

Message has 1 Reply:

		Re: How to read the touch sensors on the Scout in NQC?
(...) That is what I thought, but it will determine if the touch sensor is pressed. (...) Dunno, I'll try. Then again, if !=255 works... (...) If it were not for Perl I'd never write a line of code ^_^ (23 years ago, 17-Dec-01, to lugnet.robotics.rcx.nqc, lugnet.robotics.scout)

Message is in Reply To:

		Re: How to read the touch sensors on the Scout in NQC?
I've sort of solved my problem, but not in a way which really makes total sense. Both of the below fragments work as expectd: #1 if ((SensorValueRaw(1) & SensorValueRaw(0)) != 255) #2 if ((SensorValueRaw(1) != 255) \|\| (SensorValueRaw(0) != 255)) (...) (23 years ago, 16-Dec-01, to lugnet.robotics.rcx.nqc, lugnet.robotics.scout)

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