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abdelhamid belaid
Joined: 13 Aug 2009
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jotero
Joined: 27 Jan 2007
Posts: 153
Location: Germany Hannover
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 Posted: Mon Aug 17, 2009 5:24 am Post subject: |
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hello all 
hi abdelhamid,
very interesting work from you! You are welcome
ciao
torolf
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nextstep
Site Admin
Joined: 06 Jan 2007
Posts: 539
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| Posted: Wed Aug 19, 2009 8:14 pm Post subject: |
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Hi all;
Welcome Abdelhamid and keep up the good work 
Sorry for my late response.
I was also impressed by the work of Abdelhamid he sent me by email and asked him to subscribe in the forum to share it with others.
You can use the language of your choice Abdelhamid and I'll try to translate if you choose the Arabic
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Abderrahman |
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inode
Joined: 27 Jan 2007
Posts: 127
Location: Austria
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| Posted: Thu Oct 22, 2009 11:43 am Post subject: |
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Hi abdelhamid
As I see your surface collection is growing and growing...
Really nice work!
The 2 helix surfaces are some basics.
Please can you publish the formulars of this Helix and the Double Helix. |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Thu Oct 22, 2009 6:29 pm Post subject: The Helix |
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hi all , hi my friend inode
the Helix :
| Code: | F(x,y,z)=(sqrt(x^2+y^2)-3)^2 +(atan2((y*cos(2*z)-x*sin(2*z)),(x*cos(2*z)+y*sin(2*z)))/2 )^2 -1
x:[-4,4] and y:[-4,4] and z:[-6,6] |
the Double Helix :
| Code: | F(x,y,z)=(sqrt(x^2+y^2) - 3)^2+ ( atan((y*cos(z)-x*sin(z))/(x*cos(z)+y*sin(z))) )^2 -1
x:[-4,4] and y:[-4,4] and z:[-6,6] |
Generally
u = x * cos (n * z) + y * sin (n * z) and v = y * cos (n * z)-x * sin (n * z)
and
(sqrt (x^ 2 + y^ 2)-a) ^ 2 + (atan2 (v, u)/n) ^ 2-R ^ 2 = 0
a, n : real numbers
More generally Writing :
f( sqrt (x^ 2 + y^ 2)-a , atan2(v,u)/n )=0
For example :
abs( sqrt(x^2+y^2)-a )+abs( atan2(v,u)/n )-b=0 or
( (sqrt(x^2+y^2)-a)/b )^100+( atan2(v,u)/(n*b) )^100-1=0 .....Etc
Last edited by abdelhamid belaid on Mon May 03, 2010 10:06 pm; edited 6 times in total |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Mon Mar 15, 2010 8:57 pm Post subject: |
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Hello my dear friends
I hope you like:
Last edited by abdelhamid belaid on Thu Mar 31, 2011 1:39 am; edited 4 times in total |
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nextstep
Site Admin
Joined: 06 Jan 2007
Posts: 539
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| Posted: Wed Mar 17, 2010 8:40 am Post subject: |
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Hi Abdelhamid,
That's a wonderful structure and you are a master of the CSG (Constructive Solid Geometry) . For those who don't know it, Abdelhamid has a lot of great realisation with K3DSurf and a solid background in mathematics (university degree). We hope you all the best in your carrier and thank you again or sharing with us some of your work.
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Abderrahman |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Sat Mar 20, 2010 5:29 pm Post subject: |
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hi all
Sometimes I can not believe myself:
I would say k3dsurf is not just a computer program and is not just for drawing but it is a new part of mathematics, it is amazing thank you very much Taha.
Last edited by abdelhamid belaid on Sun May 19, 2013 4:15 pm; edited 4 times in total |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Tue Mar 23, 2010 5:21 pm Post subject: |
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hi all
Last edited by abdelhamid belaid on Sun May 19, 2013 4:16 pm; edited 2 times in total |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Thu Mar 25, 2010 11:44 am Post subject: |
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hi all,
a gesture to nature with k3DSurf...
Last edited by abdelhamid belaid on Sun May 19, 2013 4:22 pm; edited 2 times in total |
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nextstep
Site Admin
Joined: 06 Jan 2007
Posts: 539
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| Posted: Fri Mar 26, 2010 7:09 pm Post subject: |
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Hi abdelhamid,
That's a very original and exciting idea: a "dead nature" 3D painting with K3DSurf . It still need only some good apples to make it real...
Here is a good starting point for an apple looking isosurface (still need some work on the shape and the leaf )
| Quote: |
Name: IsoApple
F(): (sqrt((x*x+y*y)/((z+6)/5))-1.3)^2 + z*z/4 -1.7
[x]: -3 , 3
[y]: -3 , 3
[z]: -3 , 3
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Keep up the good work
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Cheers,
Abderrahman |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Sun Mar 28, 2010 2:59 pm Post subject: |
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Hi all, and thank you Taha
just a bush 
Last edited by abdelhamid belaid on Sun May 19, 2013 4:23 pm; edited 5 times in total |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Mon Mar 29, 2010 10:41 am Post subject: |
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hi all,
I think this is the best 
Last edited by abdelhamid belaid on Sun May 19, 2013 4:24 pm; edited 2 times in total |
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abdelhamid belaid
Joined: 13 Aug 2009
Posts: 170
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| Posted: Thu Apr 01, 2010 10:17 pm Post subject: |
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hi all
Hunting is not allowed of course
Last edited by abdelhamid belaid on Fri Apr 15, 2011 10:41 am; edited 2 times in total |
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nextstep
Site Admin
Joined: 06 Jan 2007
Posts: 539
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| Posted: Fri Apr 02, 2010 7:37 am Post subject: |
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Hi Abdelhamid,
Congratulation Abdelhamid, your work is really stunning
You've already the building blocks for much more complicated mathematical scene and we are eager to see what's next .
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Abderrahman |
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