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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Tue Feb 06, 2007 1:53 pm Post subject: 


jotero wrote: 
very nice
1/10^1
1/10^0.1

To change the "thickness" (relative porosity) of the structure, change the last number just inside the function, 1.4, to a value between 1.47 (thick) and 1.47 (thin); change the other coefficient proportionally (0.51) otherwise you'll get square shaped struts.
ciao
Ruggero 

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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Tue Feb 06, 2007 1:58 pm Post subject: 


Thank you jotero, but I have the v0.6.1. The maximum grid resolution is 60 on this version. 

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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539

Posted: Tue Feb 06, 2007 4:04 pm Post subject: 


lopkiol wrote:  Thank you jotero, but I have the v0.6.1. The maximum grid resolution is 60 on this version. 
Hi all,
happy it works for you . For the "else" instruction, if the value of the fct =1, then it's a constant > 0 ==> the surface is not defined in this area.
If you're using windows version, then you can download
the more advanced version 0.6.1.3dev :
See here for more infos
You can also compile this version for Linux (go up to 120x120x120) : http://kdeapps.org/content/show.php?content=50062 _________________ Cheers,
Abderrahman 

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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539

Posted: Tue Feb 06, 2007 4:11 pm Post subject: 


jotero wrote:  my idea

Hi all,
Waw jotero, thats a vevy very beautiful shape!
I would be happy to see the formulas of how your imagination is working too _________________ Cheers,
Abderrahman 

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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539

Posted: Tue Feb 06, 2007 4:24 pm Post subject: 


lopkiol wrote: 
Jotero, your structure is beautiful .. 
You'll be surprisd to see what's he capable of at :
http://forum.jotero.com/index.php _________________ Cheers,
Abderrahman 

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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Tue Feb 06, 2007 6:17 pm Post subject: 


Very beautiful images, jotero. I was wondering if you can render this:
if((x<12*pi)&(x>0)&(abs(y)<4*pi)&(abs(z)<4*pi),1.0*(cos(x)*sin(y)+cos(y)*sin(z)+cos(z)*sin(x))0.0*(cos(2*x)*cos(2*y)+cos(2*y)*cos(2*z)+cos(2*z)*cos(2*x))1.46*(x6*pi)/(6*pi),1)
with x between 0 and 12*pi. y and z between 4*pi and 4*pi.
If you make something really catching, it will be the cover for this conference:
http://www.4mnet.org/conference 

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jotero
Joined: 27 Jan 2007 Posts: 153 Location: Germany Hannover

Posted: Wed Feb 07, 2007 3:39 pm Post subject: 


hello all
hi lophiol,
very interesting test ask times :*)
Grid=179
Code:  F():if((x<12*pi)&(x>0)&(abs(y)<4+2*pi)&(abs(z)<4+2*pi),0.83*(cos(x)*sin(y)+cos(y)*sin(z)+cos(z)*sin(x))0.0*(cos(2*x)*cos(2*y)+cos(2*y)*cos(2*z)+cos(2*z)*cos(2*x))1.46*(x6*pi)/(6*pi),0.83)
[x]:0, 12*pi
[y]:4*pi, 6*pi
[z]:4*pi, 6*pi 
and new pc
ciao
torolf _________________ Kontakte 

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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Wed Feb 07, 2007 11:35 pm Post subject: 


It's awesome!
But could you keep the rectangular shape it has and give it a bony aspect?
The point is that this file has already been distributed in three university in United Kingdom for a set of trials on Selective Laser Sintering. So the shape should not be changed. Additionally, the conference is about new materials and this part will be a bone substitute, so it will get more chances of beeing accepted if it is rendered like a rough, opaque white material.
Ruggero 

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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539

Posted: Thu Feb 08, 2007 5:14 am Post subject: 


jotero wrote: 
and new pc

Thanks jotero, colors and lightening are fantastic _________________ Cheers,
Abderrahman 

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jotero
Joined: 27 Jan 2007 Posts: 153 Location: Germany Hannover

Posted: Thu Feb 08, 2007 6:45 am Post subject: 


lopkiol wrote:  It's awesome!
But could you keep the rectangular shape it has and give it a bony aspect?
The point is that this file has already been distributed in three university in United Kingdom for a set of trials on Selective Laser Sintering. So the shape should not be changed. Additionally, the conference is about new materials and this part will be a bone substitute, so it will get more chances of beeing accepted if it is rendered like a rough, opaque white material.
Ruggero 
very interesting.
http://staff.bath.ac.uk/ensmns/Seminars/200607/20061122.htm
Work also on it. Bone replacement
ciao
torolf _________________ Kontakte 

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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Fri Feb 09, 2007 12:24 pm Post subject: 


You caught me!
Yeah, I am actually try to characterize mechanical properties of porous matter dependence on geometricaltopological factors. One of the biggest problem of bone substitutes nowadays is that they have low strength.
Calcium phosphate is the material (better tricalcium phosphate and hydroxyapatite). I also would like to sinter this material via SLS and I notice you have a section in your forum on RP techniques. Have you ever tried to laser sinter your shapes?
ciao
Ruggero 

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jotero
Joined: 27 Jan 2007 Posts: 153 Location: Germany Hannover

Posted: Fri Feb 09, 2007 1:23 pm Post subject: 


lopkiol wrote: 
You caught me!
Yeah, I am actually try to characterize mechanical properties of porous matter dependence on geometricaltopological factors. One of the biggest problem of bone substitutes nowadays is that they have low strength.
Calcium phosphate is the material (better tricalcium phosphate and hydroxyapatite). I also would like to sinter this material via SLS and I notice you have a section in your forum on RP techniques. Have you ever tried to laser sinter your shapes?
ciao
Ruggero 
I can not give you an answer about your question because of some secrecy agreements. sorry
ciao
torolf _________________ Kontakte 

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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Thu Feb 15, 2007 5:31 pm Post subject: 


What a pity. This literally kills the forum...
Anyway, here is my new structure made with a periodic lattice.
if((x^2+y^2<900)&(abs(z)<8 ),
cos(sqrt(x^2+y^2))*sin(24*atan(y/x))+cos(24*atan(y/x))*sin(z)+cos(z)*sin(sqrt(x^2+y^2))
+0.08*(cos(2*sqrt(x^2+y^2))*cos(48*atan(y/x))+cos(48*atan(y/x))*cos(2*z)+cos(2*z)*cos(2*sqrt(x^2+y^2)))
+2*(1.2(x^2+y^2)/450),1)
x and y 30 to 30, z 8 to 8.
Hope you all enjoy it!
tcshüss
Ruggero 

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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539

Posted: Thu Feb 15, 2007 11:51 pm Post subject: 


lopkiol wrote:  What a pity. This literally kills the forum...

Hi all,
I disagrea with that, jotero has the right to say or not what he want and we are grateful to him for what he already showing as. Also, if he choose to not talk about his work and if this kill the forum, then this is not his fault but ours: He already did more than most of us.
Anyway, great structure... _________________ Cheers,
Abderrahman 

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lopkiol
Joined: 26 Jan 2007 Posts: 20 Location: United Kingdom

Posted: Fri Feb 16, 2007 6:18 pm Post subject: 


nextstep wrote:  lopkiol wrote:  What a pity. This literally kills the forum...
 jotero has the right to say or not what he want 
I didn't say he has not the right to say what he wants. He can do what he likes. And I reckon he's great (just have a look to his forum... ). But sometimes work agreements can limit freedom. I worked 1 year for General Electric and I well know what Jotero is talking about.
For the same reason I am now in the academic sector, where sharing ideas is almost compulsory.
Here is a bone wedge.
if((x^2+y^2<900)&(abs(z)<30)&(x+z>0)&(xz>0),
cos(24*log(sqrt(x^2+y^2)))*sin(24*atan(y/x))+cos(24*atan(y/x))*sin(z)+cos(z)*sin(24*log(sqrt(x^2+y^2)))
+0.08*(cos(2*sqrt(x^2+y^2))*cos(2*24*atan(y/x))+cos(2*24*atan(y/x))*cos(2*z)+cos(2*z)*cos(2*sqrt(x^2+y^2)))
+2*(1.2(x^2+y^2)/450),1)
Enjoy!
tschüss
Ruggero 

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