Happy new year 2013

 
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nextstep
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Joined: 06 Jan 2007
Posts: 538

PostPosted: Tue Jan 01, 2013 1:28 am    Post subject: Happy new year 2013 Reply with quote

Hi all,
Happy new year 2013 to all of you. K3DSurf is now working under Qt4 but some features are still missing...so patience Smile
First screenshot of the MathMod project:


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Abderrahman
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inode



Joined: 27 Jan 2007
Posts: 127
Location: Austria

PostPosted: Sun Jan 06, 2013 12:16 pm    Post subject: Reply with quote

Hi Taha

Oh that's a suprise that you continue working on K3DSurf.
If there is a beta version for testing, please let me know it.
Hopefully you do NOT rename K3dSurf to MathMod. This name is still used for other projects and I like K3dSurf as an unambiguous name.

wish all of you also a successful year 2013 Wink

ps. May I propose some changes for the next release?
- can you add an undo-function when pressing the Clear button.
- there should be much more space for displaying the dropdown list for the example name selection, because it is also used to select loaded example names.
- Automatic loading of ALL configuration values and a default button for reseting all values.
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jotero



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

PostPosted: Wed Jan 09, 2013 1:16 pm    Post subject: Reply with quote

Hi all,

Happy new year 2013 Smile

interesting Taha. I'm looking forward to the new version of the software.

ciao
torolf
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abdelhamid belaid



Joined: 13 Aug 2009
Posts: 170

PostPosted: Wed Jan 16, 2013 9:55 am    Post subject: Reply with quote

Happy new year 2013 Smile

great Taha.
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Last edited by abdelhamid belaid on Mon Mar 18, 2013 6:19 am; edited 1 time in total
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Furan



Joined: 05 Oct 2010
Posts: 64
Location: Prague, Czech Republic

PostPosted: Fri Feb 15, 2013 7:13 pm    Post subject: New Year's Object Reply with quote

There is no recent topic on parametric surfaces, so for a good start you can try the Trifold Knot. I suggest you try different crossection, inner twist etc. by adjusting functions xp, yp, zp.

Parametric curve:
Code:
x=2*sin(t)+4*sin(2*t)
y=2*cos(t)-4*cos(2*t)
z=-2*sin(3*t)
t=0..2*pi

Parametric surface:
Tangent vector u; orthogonal vectors v= u x [0 0 1]; w= u x v
Two parameters: u (rotation along main axis), v (rotation along the knot curve)
Code:
u1(u)=2*cos(u)+8*cos(2*u)
u2(u)=-2*sin(u)+8*sin(2*u)
u3(u)=-6*cos(3*u)
v1(u)=u2(u)
v2(u)=-u1(u)
v3(u)=0
w1(u)=-12*cos(3*u)*(cos(u)+4*cos(2*u))
w2(u)=12*cos(3*u)*(sin(u)-4*sin(2*u))
w3(u)=-68-32*cos(3*u)
normv(u)=sqrt(32*cos(3*u)+68)
normw(u)=sqrt(8)*sqrt(795+36*cos(9*u)+217*cos(6*u)+652*cos(3*u))
xp(u,v)=v1(u)*cos(v)/normv(u)+w1(u)*sin(v)/normw(u)
yp(u,v)=v2(u)*cos(v)/normv(u)+w2(u)*sin(v)/normw(u)
zp(u,v)=w3(u)*sin(v)/normw(u)

x=2*sin(u)+4*sin(2*u)+xp(u,v)
y=2*cos(u)-4*cos(2*u)+yp(u,v)
z=-2*sin(3*u)+zp(u,v)
u=0..2*pi
v=0..2*pi   
[/code]
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jotero



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

PostPosted: Tue Jun 04, 2013 12:40 pm    Post subject: Reply with quote

Dear Taha, there is something new from your MathMod project Wink

cu
Torolf
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