File:Abaque wulff.png
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Abaque_wulff.png (610 × 461 pixels, file size: 8 KB, MIME type: image/png)
This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionAbaque wulff.png |
English: Wulff net (step of 10°) used to read pole figures. Made with : Scilab.
Français : Abaque de Wulff (pas de 10°) pour la lecture de figure de pôles. Réalisé avec : Scilab. |
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Date | ||||||
Source | Own work | |||||
Author | Christophe Dang Ngoc Chan (cdang) | |||||
Other versions |
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Scilab source
This media was created with Scilab, a free open-source software. Here is a listing of the Scilab source used to create this file. |
clear;clf;
pas=0.01;
// Cercle de base
y=[0:pas:1]';
NY=size(y); ny=NY(1,1);
for i=1:ny
x(i)=sqrt(1-y(i)^2);
end
// Cercles méridiens
for j=1:8
r1=cos(j*%pi/18); // décalage de 10°
r2=sin(j*%pi/18);
for i=1:ny
Xm(i,j)=x(i)*r1; // coordonnées des points du cercle incliné
Ym(i,j)=y(i);
Zm(i,j)=x(i)*r2;
end
end
// Cercles parallèles
for j=1:8
r1=cos(j*%pi/18); // décalage de 10°
r2=sin(j*%pi/18);
for i=1:ny
Xp(i,j)=y(i)*r2; // coordonnées des points du cercle parallèle
Yp(i,j)=r1;
Zp(i,j)=x(i)*r2;
end
end
// Projection stéréographique
// Pôle Sud S(0,0,-1), pôle P(X1,Y,Z)
// Droite : S + m*SP = (m*X1)i + (m*Y)j + (-1+m*(Z+1))k
for j=1:8
for i=1:ny
m = 1/(1+Zm(i,j)); // z=0
Xm1(i,j)=m*Xm(i,j);
Ym1(i,j)=m*Ym(i,j);
end
end
for j=1:8
for i=1:ny
m = 1/(1+Zp(i,j)); // z=0
Xp1(i,j)=m*Xp(i,j);
Yp1(i,j)=m*Yp(i,j);
end
end
// Tracé
angle=['10','20','30','40','50','60','70','80'];
for j=1:8
plot2d(Xm1(:,j),Ym1(:,j),style=2)
plot2d(-Xm1(:,j),Ym1(:,j),style=2)
plot2d(Xm1(:,j),-Ym1(:,j),style=2)
plot2d(-Xm1(:,j),-Ym1(:,j),style=2)
plot2d(Xp1(:,j),Yp1(:,j),style=2)
plot2d(-Xp1(:,j),Yp1(:,j),style=2)
plot2d(Xp1(:,j),-Yp1(:,j),style=2)
plot2d(-Xp1(:,j),-Yp1(:,j),style=2)
end
plot2d(x,y)
plot2d(-x,y)
plot2d(x,-y)
plot2d(-x,-y)
xpoly([0,0],[-1,1])
xpoly([-1,1],[0,0])
axe=get('current_axes');
axe.axes_visible=['off','off'];
axe.isoview='on';
axe.box='off';
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
| ||
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
You may select the license of your choice.
Items portrayed in this file
depicts
13 December 2005
image/png
4d45323d89a2a67d51bf8ab088cc7972f665b5cb
8,370 byte
461 pixel
610 pixel
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 08:23, 14 December 2005 | 610 × 461 (8 KB) | Cdang | meridian and parallels | |
14:22, 13 December 2005 | 610 × 461 (5 KB) | Cdang | X axis | ||
14:19, 13 December 2005 | 610 × 461 (5 KB) | Cdang | Abaque de Wulff (pas de 10°) pour la lecture de figure de pôles ---- Wulff net (step of 10°) used to read pole figures Auteur/author : Christophe Dang Ngoc Chan (user:cdang) Réalisé avec/made with : [http://www.scilab.org/ Scilab] [[category |
File usage
No pages on the English Wikipedia use this file (pages on other projects are not listed).
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
File change date and time | 08:25, 14 December 2005 |
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Horizontal resolution | 28.34 dpc |
Vertical resolution | 28.34 dpc |
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