Subject:
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Re: Problems with FindWorld() function
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Newsgroups:
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lugnet.robotics.spybotics
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Date:
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Wed, 8 Jun 2005 20:49:49 GMT
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Viewed:
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7363 times
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In lugnet.robotics.spybotics, Wolfgang Heinrich wrote:
> I'm checking out the function FindWorld() [with BrixC and nqc version 3.1 a1
> (built Mar 8 2005, 07:33:11)] and run into problems. The call
> int t = -1;
> ClearWorld();
> FindWorld(t, SPY_RANGE, REL_GT, RANGE_NOWHERE);
> seems to work quite well. However if I try to restrict the conditions for
> finding items I get bad results.
>
> FindWorld(t, SPY_RANGE, REL_EQ, ... )
> finds no items. I tried it out with last parameter = RANGE_HERE, RANGE_THERE and
> RANGE_ANYWHERE. None of them worked.
>
> If I try
> FindWorld(t, SPY_RANGE, REL_GT, ... )
> then FindWorld always finds an item regardless of the last parameter. E.g.
> FindWorld(t, SPY_RANGE, REL_GT, RANGE_THERE)
> finds items in the THERE range, too.
>
> I'm not sure if this is a bug in NQC (or in the firmware ?!?) or if I do
> something wrong. Can anybody help?
The code generated by NQC appears to be correct. I've had reports over the
years from lots of people who have had great success with using the world
relation table information in the Spybot so I doubt that the firmware is buggy
in this respect (i.e., find world). Possibly you are calling FindWorld too
quickly after calling ClearWorld. ClearWorld will remove all entries from the
world relation table. FindWorld just returns the first entry in the table that
matches the specified criteria so if the table is empty then it would not find
anything. There are at least two very good examples of using the FindWorld API
function in NQC in the Lugnet Newsgroups.
http://news.lugnet.com/robotics/spybotics/?n=269
http://news.lugnet.com/robotics/spybotics/?n=367
Unfortunately, neither of these exercise the FindWorld function with values
other than REL_GT and RANGE_NOWHERE. I will try to run some tests myself to
verify whether other parameters work correctly.
John Hansen
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 | | Problems with FindWorld() function
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| I'm checking out the function FindWorld() [with BrixC and nqc version 3.1 a1 (built Mar 8 2005, 07:33:11)] and run into problems. The call int t = -1; ClearWorld(); FindWorld(t, SPY_RANGE, REL_GT, RANGE_NOWHERE); seems to work quite well. However if (...) (19 years ago, 8-Jun-05, to lugnet.robotics.spybotics)
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