Subject:
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Re: Seeking Strategies on Humanoid Robots/Walkers
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 31 Dec 1998 21:49:31 GMT
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Original-From:
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L. M. Lloyd <LEE@ihatespamADVFILMS.COM>
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Viewed:
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1455 times
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Andrew Phelps wrote:
> To do this, and many other things, I am trying to write a parser to grab
> motion information from high-end animation packages (Alias|Wavefront's Maya
> and Side Effects Houdini) and use the Not Quite C (NQC) and stripped C++
> versions of RCX programming to carry out a subset of that information
> assuming a model that is in scale with the computer generated geometry.
> This will likely be tremendously difficult and take a LOOOOONG time because
> typically these packages store the current positions of the data as absolute
> co-ordinates rather than relative to the last known position :( If I can
> strip everything but the rotation elements of the modelled joints I think I
> can get further along with that information and allowing the robot to
> perform the joint rotations (have to work up a scale where x amount of motor
> time on multiplied by y speed = z rotation along whatever axis...) Promises
> to keep me out of trouble for a long time <G>
I am playing with a similar project in my spare time, I have found that your
first step should probably be to write a MEL script that outputs a text file
with all of your rotational data (this is easier if you are not using IK, but
can be done with IK). What I am currently working on is trying to get Technic
parts out of Ldraw and into Maya so that I can build my LEGO creation there,
then animate it doing what I want it to, output a text file (through my MEL
script), and figure out some way to get that to work with the RCX. I would be
curious to hear how you are looking at doing it.
--
__________________
L. M. Lloyd
lee@advfilms.com
SGI Animator
ADV Films USA
__________________
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | RE: Seeking Strategies on Humanoid Robots/Walkers
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| Interesting !! Nice to have someone else tackling the problem, I guess if your on the Internet your never alone :) That is a good idea about using MEL, it should be possible to construct a file, perhaps even standardize a format to it and then read (...) (25 years ago, 31-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | RE: Seeking Strategies on Humanoid Robots/Walkers
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| Greetings Lego Fans - I am seeking tips/tricks/hints on building humanoid characters with the RCX designed for movement (2 legs, 2 arms, 1 torso, and 1 head). Ideally, it would be capable of mimicking at least 2 joints per limb (say, elbow and wrist (...) (25 years ago, 31-Dec-98, to lugnet.robotics)
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