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inode
Joined: 27 Jan 2007 Posts: 127 Location: Austria
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Posted: Sun Dec 02, 2007 10:33 pm Post subject: Xmas competition |
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Hi all
Because of chrismas is coming I have an idea.
Lets make a little Xmas competition!
Everbody who has some formulas which looks approximately like a tree should publish it - here in this forum!
So please if YOU have a "tree formula" let us know about it...
Gerd |
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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539
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Posted: Mon Dec 03, 2007 1:54 pm Post subject: |
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Hi all,
Very good idea Gerd...and I like the competition's name
Hope we will have some Xifts before chrismas _________________ Cheers,
Abderrahman |
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François LE COAT
Joined: 03 Feb 2007 Posts: 28 Location: France
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Posted: Mon Dec 03, 2007 5:19 pm Post subject: |
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Within Eureka 2.12, I invented the formula of this kind of tree
that gives this kind of animation http://eureka.atari.org/walking.mov
That's designed for cylindrical coordinates described by
Code: | R^1 = mod(4-z)*(4-z)*sin(5*u+pi/2)^2
With U[ 0, 2*pi] And V[ 0, 4] |
But it gives me a syntax error, and I can't explain ?
Any idea ? _________________ -- archimedium
http://eureka.atari.org/ |
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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539
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Posted: Mon Dec 03, 2007 6:09 pm Post subject: |
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Hi all,
Waw..that's a beautiful chrismas tree François
For the formulas, the error message is for the function "mod". You can use the operator "%" to define the modulo function (ex : 5 % 2 = 1 ) but I'm not sure this is the function you're using since I cant reproduce the same shape you have... _________________ Cheers,
Abderrahman |
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François LE COAT
Joined: 03 Feb 2007 Posts: 28 Location: France
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Posted: Mon Dec 03, 2007 6:42 pm Post subject: |
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Quote: | Waw..that's a beautiful chrismas tree François |
You're kind Taha
Quote: | For the formulas, the error message is for the function "mod". You can use the operator "%" to define the modulo function (ex : 5 % 2 = 1 ) |
That's strange, because mod() is given on http://k3dsurf.sf.net. Is it a mistake ?
Quote: | but I'm not sure this is the function you're using since I can't reproduce the same shape you have ... |
I got Christmas Tree !
Code: | R^1 = ((4-z)%1)*(4-z)*sin(5*u+pi/2)^2
With U[ 0, 2*pi] And V[ 0, 4] |
Many thanks _________________ -- archimedium
http://eureka.atari.org/ |
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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539
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Posted: Tue Dec 04, 2007 8:51 pm Post subject: |
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Hi all,
Yes it's a mistake! I'll correct that in the next release.
Also, many thanks for your beautiful chrismas tree _________________ Cheers,
Abderrahman |
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inode
Joined: 27 Jan 2007 Posts: 127 Location: Austria
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Posted: Sat Dec 08, 2007 2:51 pm Post subject: PG_Xmas_Tree_1 |
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my first tree - looks more like a corel - however here it is...
Code: | Name: PG_Xmas_Tree_1
/* Name: PG_Xmas_Tree_1 12/2007 Gerd Platl */
F(): 2-(x^2+y^2)/55-0.135*z-cos(sqrt(x^2+y^2))*sin(12*atan(y/x)) -cos(12*atan(y/x))*sin(z) -cos(z)*sin(sqrt(x^2+y^2))-0.3*(cos(sqrt(x^2+y^2))*cos(15*atan(y/x)) -cos(15*atan(y/x))*cos(z) -cos(z)*cos(sqrt(x^2+y^2)))
[x]: -20 , 20
[y]: -20 , 20
[z]: -30 , 23.5
; |
Gerd
Last edited by inode on Sat Dec 08, 2007 4:38 pm; edited 1 time in total |
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inode
Joined: 27 Jan 2007 Posts: 127 Location: Austria
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Posted: Sat Dec 08, 2007 4:01 pm Post subject: PG_Xmas_Tree_2 |
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hohoho - much work - but I've got it!
<-k3dsurf | PovRay ->
missing only some glitter spheres Gerd |
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nextstep Site Admin
Joined: 06 Jan 2007 Posts: 539
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Posted: Sat Dec 08, 2007 10:32 pm Post subject: |
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Hi all,
Ouuuuuups...you're a genius Gerd
That's trully the most beautiful mathematical Christmas tree I have ever seen. Congratulations _________________ Cheers,
Abderrahman |
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