Periodic lattices
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lopkiol



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

PostPosted: Tue Feb 06, 2007 1:53 pm    Post subject: Reply with quote

jotero wrote:

very nice Smile
-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
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Location: United Kingdom

PostPosted: Tue Feb 06, 2007 1:58 pm    Post subject: Reply with quote

Thank you jotero, but I have the v0.6.1. The maximum grid resolution is 60 on this version. Sad
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nextstep
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Joined: 06 Jan 2007
Posts: 538

PostPosted: Tue Feb 06, 2007 4:04 pm    Post subject: Reply with quote

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

Hi all,
happy it works for you Smile . 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 0.6.1.3-dev :
See here for more infos
You can also compile this version for Linux (go up to 120x120x120) : http://kde-apps.org/content/show.php?content=50062
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Abderrahman
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nextstep
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PostPosted: Tue Feb 06, 2007 4:11 pm    Post subject: Reply with quote

jotero wrote:
my idea Wink

Hi all,
Waw jotero, thats a vevy very beautiful shape! Smile
I would be happy to see the formulas of how your imagination is working too Very Happy
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nextstep
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PostPosted: Tue Feb 06, 2007 4:24 pm    Post subject: Reply with quote

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 Very Happy
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lopkiol



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

PostPosted: Tue Feb 06, 2007 6:17 pm    Post subject: Reply with quote

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*(x-6*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.4m-net.org/conference
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jotero



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

PostPosted: Wed Feb 07, 2007 3:39 pm    Post subject: Reply with quote

hello all Smile

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*(x-6*pi)/(6*pi),0.83)
[x]:-0,  12*pi
[y]:-4*pi,  6*pi
[z]:-4*pi,  6*pi


and new pc Smile


ciao
torolf
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lopkiol



Joined: 26 Jan 2007
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PostPosted: Wed Feb 07, 2007 11:35 pm    Post subject: Reply with quote

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
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PostPosted: Thu Feb 08, 2007 5:14 am    Post subject: Reply with quote

jotero wrote:

and new pc Smile

Thanks jotero, colors and lightening are fantastic Shocked
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jotero



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PostPosted: Thu Feb 08, 2007 6:45 am    Post subject: Reply with quote

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/2006-07/20061122.htm

Work also on it. Bone replacement Wink

ciao
torolf
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lopkiol



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PostPosted: Fri Feb 09, 2007 12:24 pm    Post subject: Reply with quote

jotero wrote:


very interesting.
http://staff.bath.ac.uk/ensmns/Seminars/2006-07/20061122.htm

Work also on it. Bone replacement Wink


Very Happy
You caught me!
Yeah, I am actually try to characterize mechanical properties of porous matter dependence on geometrical-topological 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
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PostPosted: Fri Feb 09, 2007 1:23 pm    Post subject: Reply with quote

lopkiol wrote:
jotero wrote:


very interesting.
http://staff.bath.ac.uk/ensmns/Seminars/2006-07/20061122.htm

Work also on it. Bone replacement Wink


Very Happy
You caught me!
Yeah, I am actually try to characterize mechanical properties of porous matter dependence on geometrical-topological 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
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lopkiol



Joined: 26 Jan 2007
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PostPosted: Thu Feb 15, 2007 5:31 pm    Post subject: Reply with quote

What a pity. Crying or Very sad 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! Smile

tcshüss
Ruggero
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nextstep
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PostPosted: Thu Feb 15, 2007 11:51 pm    Post subject: Reply with quote

lopkiol wrote:
What a pity. Crying or Very sad 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...
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Abderrahman
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lopkiol



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PostPosted: Fri Feb 16, 2007 6:18 pm    Post subject: Reply with quote

nextstep wrote:
lopkiol wrote:
What a pity. Crying or Very sad 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... Very Happy). 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. Smile
Here is a bone wedge.

if((x^2+y^2<900)&(abs(z)<30)&(x+z>0)&(x-z>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! Cool

tschüss
Ruggero
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