Subject:
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Re: global output control
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Newsgroups:
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lugnet.robotics.rcx.nqc
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Date:
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Thu, 22 Jun 2000 23:13:42 GMT
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Viewed:
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1778 times
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In article <000b01bfdc59$47ea4a00$0100a8c0@pro150>, "Ralph Hempel"
<rhempel@bmts.com> wrote:
> ReverseOutput(const int outs); // global reverse
> ForwardOutput(const int outs); // global fwd
>
> Reverse kind of implies invert, but I don't think
> that will matter to many folks...
The problem I have with ForwardOutput() and ReverseOutput() is that the
terms 'forward' and 'reverse' already have a meaning - specifically they
refer to motor directions...
Fwd(OUT_A);
Rev(OUT_B);
If you then 'reverse' the global direction...
ReverseOutput(OUT_A, OUT_B);
one might expect A and B to both be spining in the 'reverse' direction,
however you'll find that both have been flipped and A is going 'reverse'
and B is going 'forward'.
I agree Invert isn't much better since a second call doesn't undo the
effects of the first call.
---
Whenever I run into this big of a naming problem I tend to question
whether the thing being named is at fault. Those global bytecodes are
very poorly thought out...not only do they work in a non-obvious way,
but they also aren't very useful.
Another alternative for me is to ditch the whole
Enable/Disable/Invert/??? thing and just leave it at
SetGlobalOutput(outputs, mode)
SetGlobalDirection(outputs, dir)
where mode is one of OUT_ON, OUT_OFF, etc.
and dir is one of OUT_FWD, OUT_REV, etc.
and let the user beware of the strageness.
Dave
--
reply to: dbaum at enteract dot com
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Message has 1 Reply:
 | | Re: global output control
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| (...) I thought about this for a while, when I was thinking about "obvert". In one sense, "invert" does imply that inversing again will revert (*grin*), but I don't believe that this meaning is implicit. There is another sense which simply means "to (...) (24 years ago, 22-Jun-00, to lugnet.robotics.rcx.nqc)
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Message is in Reply To:
| | RE: global output control
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| (...) Ummm, how about... ReverseOutput(const int outs); // global reverse ForwardOutput(const int outs); // global fwd Reverse kind of implies invert, but I don't think that will matter to many folks... Cheers, Ralph Hempel - P.Eng ---...--- Check (...) (24 years ago, 22-Jun-00, to lugnet.robotics.rcx.nqc)
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