[Vzome-users] Strut length in vZome

[Ezra Bradford]

Perusing a random vZome file, the model seems to be saved as an edit  
history. A point is saved in the form Aphi+B. A dragged strut is  
saved as a point and a length, a joined strut is saved as two points.  
Presumably one can calculate the length of a joined strut from those.  
Just open the vZome file in your favorite text/xml editor and have  
at. (However I imagine Symmetry struts are a bit harder to find!)  
Also the translation into rZome could be tricky without a table of  
rZome lengths in terms of taus on hand.

Mr. Vorthmann seems to have beaten me to the description of the math,  
but the vZome is still relevant.

Ezra


On May 9, 2007, at 1:24 PM, Jack Levy wrote:

> Oops, I meant to send this to the list and hit the wrong button.
>
> Jack.
>
>
> Begin forwarded message:
>
>> From: Jack Levy <j.levy at ucl.ac.uk>
>> Date: 9 May 2007 9:20:45 pm BDT
>> To: "Stephen Wilson" <maqtoh2 at hotmail.com>
>> Subject: Re: [Vzome-users] Strut length in vZome
>>
>> Yes, it would be nice if vZome had some sort of "show properties"
>> facility that shows how long a selected strut is, in particular one
>> that has been created using "join nodes".  The direction is shown
>> by the colour, but you have to guess the length by trying struts of
>> various scales and sizes until one fits.  I don't know if vZome
>> remembers node positions in algebraic terms, as expressions
>> involving Tau and trig functions, or as real-valued approximations,
>> so I'm not sure if this would be easy or not.
>>
>> Jack.
>>
>> On 9 May 2007, at 8:39 pm, Stephen Wilson wrote:
>>
>>> Scott,
>>>
>>> I am wondering just how to determine the length of a strut. That
>>> is, I am trying to figure out just how to identify which strut is
>>> the long, and how to get it. I am tryihg to build something in
>>> rZome, and need to figure out how to build it from a particular
>>> point, while bulding structures which, in rZome, like to spring
>>> apart. And I need to start from either a y3 or a b3, or at least a
>>> b2. Can you advise on how to make this determination? Thanks.
>>>
>>> maqtoH
>>>
>>> _________________________________________________________________
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>>
>> Jack Levy,                                  e-mail: j.levy at ucl.ac.uk
>> Applications and Academic Support Group,    phone: +44 (0)20 7679  
>> 2799
>> Information Systems,                               (internal: 32799)
>> University College London,                  fax: +44 (0)20 7388 5406
>> Gower Street,
>> London WC1E 6BT.
>>
>>
>>
>
> Jack Levy,                                  e-mail: j.levy at ucl.ac.uk
> Applications and Academic Support Group,    phone: +44 (0)20 7679 2799
> Information Systems,                               (internal: 32799)
> University College London,                  fax: +44 (0)20 7388 5406
> Gower Street,
> London WC1E 6BT.
>
>
>
>
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