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Geospheres and shell tool
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Geospheres and shell tool // Roundtable
Post by CdeB // Sep 5, 2007, 10:25pm
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CdeB
Total Posts: 160
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Hi,
I've been absent from trueSpace and forums for several months due to intense work pressure. Intense work pressure has now focussed on me trying to complete a model for work in the next 24 hours.
I would really like to create the geosphere with empty lattice structure as demonstrated using the shell tool in the tS6 manual page 212. After some trial and error I got it to work, but to get the regularity and uniformity I need to start with a solid geosphere. Does anybody know a source of a model that could be imported into trueSpace. I seem to vaguely remember that one of the old plug in suites had tbe ability to create this kind of shape, but I am unsure what...
picture of what I want is below.
8271
Thanks very much in anticipation
PS Roman and Dele will send you some news soon.. |
Post by Georg // Sep 6, 2007, 12:11am
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Georg
Total Posts: 270
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When you make a sphere you can decide on the number of faces. Just create one and immediately rightclick the sphere icon without touching anything else. It opens two rows of icons with which you can adjust the number of vertices etcetera. That way you can make any type of geosphere.
It works in model side, I am not sure about workspace.
Georg |
Post by CdeB // Sep 6, 2007, 1:05am
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CdeB
Total Posts: 160
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Great!,
Thanks Georg,
Chris |
Post by Jack Edwards // Sep 6, 2007, 2:00am
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Jack Edwards
Total Posts: 4062
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Hey guys, is this what you're looking to do?
-Jack.
Video attached (XVid Codec) |
Post by CdeB // Sep 6, 2007, 4:36am
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CdeB
Total Posts: 160
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Yes!
Thanks Jack. Its nice to see how you can do it in workspace as well as purely on the modeling side. A very useful video.
I am working with tS6.6 purely for speed reasons. I have a deadline and I still am not so familiar with workspace (though I have it).
So, now the boss want me to change half a dozen other parameters on the model I have built....but at least I have solved one issue.
Thanks again,
Chris |
Post by Jack Edwards // Sep 6, 2007, 6:26am
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Jack Edwards
Total Posts: 4062
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Glad I could help :D
The tricks to remember from the above example are:
1.) Holding down the ALT key when performing the bevel leaves the beveled areas selected.
2.) Holding down CTRL when using the Normal Extrude tool will extrude the selection as a single group.
Those may not have been apparent in the video.
-Jack. |
Post by RAYMAN // Sep 7, 2007, 3:12pm
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RAYMAN
Total Posts: 1496
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If you are deeply into geospheremodels and
other models of that kind you should look
into topmod... together with Truespace it does
unlimited kinds of these...
http://forums1.caligari.com/truespace/showthread.php?t=4012
Its a free aplication a little bit crashy but worth a try ! |
Post by CdeB // Sep 10, 2007, 2:42am
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CdeB
Total Posts: 160
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Hi,
Now back after weekend -Thanks all
-Rayman, an interesting link I am now looking into it.
The deadline is now extended as the text my diagram is supposed to support is still undergoing revision, and I am now thinking I might have time to model exactly what I wanted. The geosphere was, I thought, I quick way to get the basic impression of what I wanted, the actual thing being more complex.
Without a tablet at work, the sketch below is really, well 'sketchy'. It is a macromolecular complex called clathrin and as you can see it is constructed with both hexagons and pentagons. 6 hexagons round the middle and one at the top and bottom. Sandwiched between are two layers of 6 pentagons.
Unless rayman's linked program enables me to make this, I am planning to make it ´'long-hand' by modeling and linking pentagons and hexagons. Any other suggestions would be gladly welcome.
'Clathrin'
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But don't get me wrong I really appreciate the help so far.
Chris |
Post by Nez // Sep 10, 2007, 5:47am
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Nez
Total Posts: 1102
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Well there's probably a number of ways you could go about it, depnding on which tools you're happiest with (and which your version of TS has - I'm not too familiar with the newer versions).
One option would be to draw 6 and 7 sided polygons for your various 'lattitudes' (6 for the top, 6 again, two at 7 and two more at 6 for the underside) and just joint the vertices until you've formed all the edges. (Does that make sense?!) Fill out the faces and apply the technique (shell and strut?) shown in Jack's video.
Or you could just start with a low resolution sphere and manipulate the vertex positions, delete and replace a few faces, etc, and then apply the shell/strut method.
Probably other ways too; look forward to seeihng how it turns out... |
Post by RAYMAN // Sep 10, 2007, 5:53am
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RAYMAN
Total Posts: 1496
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. Any other suggestions would be gladly welcome.
Chris
Well the topmod does the cutting out by a press of two buttons !
And for the basic form it does not have exactly this included so
you will have to make it yourself.
This would be a good chance to expose yourself to Moi 3d !
A program that does the buildup of this form with geometrical
precision and still is in beta and free ! 3d vis dude exposed us to this
and I cant do without it any more ! Its a fantastic nurbs modeler
with the easy use of Sketchup.When you export with it with obj.
form in your case use ngon from the pull down menue otherwise
you will get tris or quads.
http://www.moi3d.com/
Best regards
Peter |
Post by Steinie // Sep 10, 2007, 5:57am
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Steinie
Total Posts: 3667
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If you drew a horizontal line halfway down the object you would then only be using polygons, then mirror top and bottom. Remove the seam. |
Post by Jack Edwards // Sep 10, 2007, 6:33am
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Jack Edwards
Total Posts: 4062
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Mirror and mirror modeler tools would be very useful in creating this shape if you plan to do it by hand. If you use mirror modeler to orient the hexagon pieces though remember to flatten history so you can add the next part. ;)
Another easy way to consider for making the shapes is to create a cylinder in workspace side, set your number of faces and shell value. Make the height equal to the depth of your shell. You'll need to scale the inner face to match the angles of your object. Also don't forget to delete the interior faces before welding the connecting verts together.
About the video I made. I just used the Bevel too and held down ALT so that the new faces would be selected. I think deleted the selected faces. Selected the remaining faces, held CTRL and did a normal sweep.
At this point, since you have a deadline, I'd create it manually instead of trying to figure out the most accurate/easist method. If it's for graphical illustration and not cad/cam work then the angles and vert positions don't have to be perfect. Good luck! |
Post by RAYMAN // Sep 10, 2007, 8:05am
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RAYMAN
Total Posts: 1496
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Well here is how I did it.
I used moi but you can use next to every software
that lets you add edges....
1. make a hexagon with the tool copy it 3 times.
Use a hexagon as a guide like in the picture to
set them up in the 3 directions.
2. use another hexagon on the top and the botom
for filling in the rest of the points of the other hexagons.
3. then place 2 hexagons on top and on bottom...
4. join the edges...
Here are three pictures ... takes about 10 minutes
The rest is a job for topmod. . .
Peter |
Post by RAYMAN // Sep 10, 2007, 3:51pm
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RAYMAN
Total Posts: 1496
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Well in the end it was not that simple.
I just works to skin those hexes and pentas if
they are all flat ! But in the nurbs modeler and in topmod
together it was possible ..... so here is the .obj file for
the basic form and for the shelled form....
Peter |
Post by Nez // Sep 10, 2007, 11:01pm
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Nez
Total Posts: 1102
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Nice job Rayman! I managed to get to a similar looking stage in MOI, with a collection of polygons and straight lines, but wasn't too sure where to go from there (was my first time actually trying to use MOI properly). Tried to create surfaces but couldn't really get very far, wasn't sure if I needed to join lines or what... |
Post by CdeB // Sep 11, 2007, 12:15am
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CdeB
Total Posts: 160
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A very big thanks Peter,
Unfortunately I have got stuck in MOI at the same place as NEZ and with the clock ticking I realise I have hit another time consuming learning curve -though I am sure when I master it it will be very useful indeed. Documentation is sparce to say the least..
So...I wonder whether I could have permission to use your model if I come to a complete standstill trying my own. I think between you, you've placed some great new tools in my hands but, in the end it is all to do with learning curves and deadlines...
Thanks,
Chris |
Post by RAYMAN // Sep 11, 2007, 2:28am
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RAYMAN
Total Posts: 1496
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Chris !
I found out that its realy complicated myself
and the maker of moi helped me a little
where i got stuck myself. He even got stuck !
Its one of the not easy forms to do because
you want the hexs AND the pents to be 100% planar
otherwise no shelling that way. He showed me a way
to fold it from the base upward with 100% precision.
YES YOU CAN use it for whatever you like.... !
I made it for you...otherwise my efforts would have
been for nothing !:)
Please do consider using moi3d it is such a good compliment
to TS and topmod is perfect for shelling.....
Peter |
Post by CdeB // Sep 13, 2007, 3:06am
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CdeB
Total Posts: 160
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Heads up Dele and Roman please read your emails!
RAYMAN,
Unfortunately, I ran out of time and haven't succeeded with doing clathrin myself, so at your invitation I have used your model. It therefore seems only fair that you see what I used it for. So I have pasted it below. I combined Coreldraw and truespace to produce it (I normally only use coreldraw for my illustrations...but I thought it was time to make the break). I hope you are not disappointed and at least my boss was impressed.
I will not attempt to explain the science, (unless pressed:) ) so just see the text as some hyrogliphics....it is the inner workings of an insulin-secreting cell much stylized...
Thanks again,
Chris
8394 |
Post by RAYMAN // Sep 13, 2007, 8:43am
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RAYMAN
Total Posts: 1496
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I will not attempt to explain the science, (unless pressed:) ) so just see the text as some hyrogliphics....it is the inner workings of an insulin-secreting cell much stylized...
Thanks again,
Chris
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Chris !
Thank you very much for sharing the end result !
It looks very nice !:)
My father was an international well known diabethologist .. a Boston Joslin
fellow ........ and I studied medicine too so I understand your
hyrogliphics !
Peter |
Post by CdeB // Sep 13, 2007, 9:36pm
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CdeB
Total Posts: 160
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Glad you liked it Peter,
-and it was a bonus you could at least understand it as well. As you might guess I work in a Diabetes Research Center!
See your messages if you want to know more -I won't bore the rest of the community...
Chris |
Post by CdeB // Sep 17, 2007, 6:07am
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CdeB
Total Posts: 160
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Hi,
RAYMAN and others. Here is new scene in which Peters clathrin is more fully featured!
Chris
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