Archiu:VFPt charges plus minus thumb.svg
Tamany d'esta previsualisació PNG de l'archiu SVG: 220 × 165 píxels. Atres/s resolucions: 320 × 240 píxels | 640 × 480 píxels | 1024 × 768 píxels | 1280 × 960 píxels | 2560 × 1920 píxels.
Resolució completa. ((Image SVG, nominalment 220 × 165 pixels, tamany d'archiu: 18 kB))
Summary
| Description |
English: Field of a positive and a negative point charge. Thumbnail version |
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| Date | |||
| Source | Own work | ||
| Author | Geek3 | ||
| Other versions |
VFPt charges plus minus.svg (full size version) |
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| SVG development |
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| Source code | SVG code# paste this code at the end of VectorFieldPlot 2.5
doc = FieldplotDocument('VFPt_charges_plus_minus_thumb',
width=220, height=165, unit=30., commons=True)
field = Field([['monopole', {'x':-1, 'y':0, 'Q':1}],
['monopole', {'x':1, 'y':0, 'Q':-1}]])
doc.draw_charges(field, scale=11./14.)
n = 16
for i in range(n):
a = 2.0 * pi * (0.5 + i) / n
if abs(i - (n-1)/2.) > 6:
fix = {'start':False, 'leave_image':False, 'enter_image':False, 'end':False}
else:
fix = {'start':True, 'leave_image':False, 'enter_image':False, 'end':True}
line = FieldLine(field, [-1,0], start_v=[cos(a), sin(a)],
directions='forward')
doc.draw_line(line, linewidth=1.0, arrows_style={
'dist':1.6, 'min_arrows':1, 'offsets':
{'start':.65,'leave_image':.5,'enter_image':.5,'end':.65},
'fixed_ends':fix, 'scale':1.4})
doc.write()
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Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
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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. |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.
Historial de l'image
Puncha en la data/hora per a vore l'image tal i com es mostrava en eixe moment.
| Data/Hora | Miniatura | Dimensions | Usuari | Descripció | |
|---|---|---|---|---|---|
| actual | 19:12 14 març 2020 | | 220 × 165 (18 kB) | wikimediacommons>Geek3 | I appreciate the compression. However, 18kB savings in the source code are no relevant advantage. The original image has a clear internal structure for simple reusability. It contains useful meta information. The approximation of lines by straight segments is the most simple one, and it is more precise than the "simplified" version with Beziers. Note e.g. that the arrows should be centered on each line. |
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