Subject:
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Re: and the sine & cosine functions for the NXT
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 22 Dec 2006 23:13:41 GMT
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Viewed:
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2687 times
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In lugnet.robotics, Claude Baumann wrote:
> who is going to draw the first sine and cosine waves on the NXT display?
Well, I've already done that, as well as a nifty display meter, and some other
stuff that depends on trig functions... but I did it all in NXT-G, without the
toolbox:
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1898079
I'm looking forward to trying your custom stuff, however, as my NXT-G trig
functions (particularly atan()) were getting ugly... How did you implement the
trig functions (Taylor, lookup, or other)? I didn't use Taylor because of the
inaccuracy around 90°, but under LV, it might be easier to just push the the
approximation to better levels.
--
Brian Davis
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Message has 2 Replies:
 | | Re: and the sine & cosine functions for the NXT
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| (...) As explained on our pages, I am using CORDIC algorithm. This assures best accuracy and converges much more rapidly than Taylor. There is one trade-off though, because there is no bit shifting operation in the toolkit, I must do division (...) (18 years ago, 23-Dec-06, to lugnet.robotics)
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Message is in Reply To:
| | and the sine & cosine functions for the NXT
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| now we have a complete integer trig-function package. Challenge : who is going to draw the first sine and cosine waves on the NXT display? Please report any bugs. www.convict.lu/Jeune...sIntro.htm Claude (18 years ago, 22-Dec-06, to lugnet.robotics)
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