Quaternions

Stoatstail50 · Post by **Stoatstail50** » Wed Mar 02, 2011 2:30 pm

OK Frank....you got me....I have never heard of quaternions and I cant begin to tell you how much I am looking forward to you telling me how they fit into your casting model...

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 2:36 pm

Well it doesn't Mark that's the whole point, as it's scalar as it relates to a straight line or 180 it has no vector component. If it were an odd multiple of 90 degrees it would. Look it up. I did. Actually I was surprised to see it staring me right in the face.

Stoatstail50 · Post by **Stoatstail50** » Wed Mar 02, 2011 2:42 pm

Look it up

I did...

....what was it about transformational mathematics that was staring you in the face, I barely understand a word of it... :oh:

VoodooChild · Post by **VoodooChild** » Wed Mar 02, 2011 2:43 pm

quaternion

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 2:45 pm

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 3:05 pm

Stoatstail50 wrote:
Look it up
I did...

....what was it about transformational mathematics that was staring you in the face, I barely understand a word of it... :oh:

Keep looking then Mark because if I can find it you can to. I have no mastery over the subject nor do I claim to. But a quaternion in physics consists of a scalar and a vector. It says that it is the angle that determines whether or not a force is a scalar or a vector. If the angle is an even multiple of 90 degrees as in 180 degrees the force is scalar, if the number is odd it is considered a vector. Which makes simple sense. beyond that it's all greek to me.

Aitor · Post by **Aitor** » Wed Mar 02, 2011 3:07 pm

Casting angle?

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 3:16 pm

Aitor,

If you have nothing constructive to offer, and only little smiles and a word or two, sarcasm, hyperbole, and whatever else it is you think your adding to the mix, please refrain from posting at all as it serves no purpose. That or I'll simply ask Paul to remove this entire forum from the board. If that works for you it works for me no problem.

Frank

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 3:24 pm

Stoatstail50 · Post by **Stoatstail50** » Wed Mar 02, 2011 3:27 pm

Right OK, what does that mean with respect to casting then ?

Marc LaMouche · Post by **Marc LaMouche** » Wed Mar 02, 2011 3:46 pm

Frank LoPresti wrote:please refrain from posting at all as it serves no purpose.

you're ok with onions but not casting angles ?
good going Frank...

Stoatstail50 · Post by **Stoatstail50** » Wed Mar 02, 2011 3:54 pm

OK, nailed it now, there is a good explanation of what they are here and I think its pretty obvious that this is what we have been missing all along... :closedeyes:

Aitor · Post by **Aitor** » Wed Mar 02, 2011 3:57 pm

Frank LoPresti wrote:Aitor,

If you have nothing constructive to offer, and only little smiles and a word or two, sarcasm, hyperbole, and whatever else it is you think your adding to the mix, please refrain from posting at all as it serves no purpose. That or I'll simply ask Paul to remove this entire forum from the board. If that works for you it works for me no problem.

Frank

No problem. Actually it is what I should have done years ago.

Bye.

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 4:04 pm

I understand Marc, but there has been a pattern here that has nothing to do with humor. I'm okay with humor. What I'm not okay with is someone who drops emoticons as if they were terse exclamations of something to the contrary or questioning something without explaining themselves as to the nature of whatever point they are trying to make as if to question the integrity of a statement without even answering it as to it's validity or lack thereof. That becomes a problem after a while that serves no purpose but that persons own self interest. That and a few other comments made by the same individual go directly to the the same issue.

So while I agree that it is unfortunate that I have to make such a request I would urge anyone to post, but do so with a sense of advancing the dialogue, not distracting from it as that serves no purpose and it is not my purpose to moderate that type of dialogue.

Frank

Frank LoPresti · Post by **Frank LoPresti** » Wed Mar 02, 2011 4:20 pm

Stoatstail50 wrote:OK, nailed it now, there is a good explanation of what they are here and I think its pretty obvious that this is what we have been missing all along... :closedeyes:

I don't know Mark. What I do know is that I find less evidence to support the idea that translation alone has a direct bearing on tip path as it relates to loop formation. I'd love the underdog to win out at this point, I'd have no problem with that, I'm actually hoping that would be the case, if you can believe that. But that has not happened yet.

So whether or not the quaternion aspect of physics applies or not as to translation being scalar only, by analogy or directly, it seems to impose a threshold for what might and might not have an effect on tip path as it goes to loop formation :closedeyes:

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