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File:Moment of inertia disc.png

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Moment_of_inertia_disc.png (164 × 84 pixels, file size: 2 KB, MIME type: image/png)

Summary

Description MetaPost image of a disc, with dimensions and axes specified. Embedded in a TeX document, viewed with gv, rasterized via screenshot, saved as PNG with The Gimp, and compressed with optipng.
Date Unknown date
Source wiki.riteme.site
Author Grendelkhan
Permission
(Reusing this file)
Grendelkhan

MetaPost source of the image follows.

u=18mm;
textscale=u/12mm;
% this MetaPost script generates a PostScript file, which is then included in a
% TeX document. if you want to generate EPS from this, you'll have to uncomment
% the following line. (and probably do a couple more things, to boot.)
%prologues := 1;
def disc =
  begingroup;
  save pmax,persp,persp_nt,tens,arr;
  save rarrlft,rarrrt;
  save p;
  save axisprotrusion;
  save xax,yax,zax;
  pmax = 0;
  persp_nt = 0.3;
  tens = 2-persp_nt;
  persp = persp_nt*u;
  arr = 0.3u; % how far to offset the arrows from the diagram
  axisprotrusion = 1u;  % how far do the axes protrude?
  pair rarrlft,rarrrt; % endpoints for arrows
  path p[]; % just plain paths for now
  pair xax[],yax[],zax[]; % x,y,z are taken; these are for the axes
  % solid paths
  p0 = fullcircle scaled u xscaled 2 yscaled 2persp_nt;
  % endpoints of dimension arrows
  rarrlft = (0,0);
  rarrrt = (1u,0);
  % actually draw
  pickup pencircle scaled 1pt;
  for i=0 upto pmax:
    draw p[i];
  endfor;
  drawdblarrow (rarrlft..rarrrt);
  label.top(btex $r$ etex scaled textscale,.5[rarrlft,rarrrt]);
  % x axis
  xax1 = (1u,0);
  xax2 = (1u+axisprotrusion*0.5,0);
  drawarrow (xax1..xax2);
  label.rt(btex $x$ etex scaled textscale,xax2);
  % y axis
  yax0 = (0,0);
  yax1 = point 5 of p0;
  yax2 = (.6+axisprotrusion/u)[yax0,yax1];
  drawarrow (yax1..yax2);
  draw yax0..yax1 dashed evenly;
  label.ulft(btex $y$ etex scaled textscale,yax2);
  % z axis
  zax0 = (0,0);
  zax1 = (0,axisprotrusion);
  drawarrow (zax0..zax1);
  label.top(btex $z$ etex scaled textscale,zax1);
  endgroup;
enddef;
beginfig(1)
  disc;
endfig;

(Note that this source code doesn't fill the circle, and draws the x and y axes the wrong way round. The code provided with the SVG version of this image corrects these problems.)

Licensing

w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers.
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.
This licensing tag was added to this file as part of the GFDL licensing update.
GNU head 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. Subject to disclaimers.

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File history

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Date/TimeThumbnailDimensionsUserComment
current08:20, 28 October 2007Thumbnail for version as of 08:20, 28 October 2007164 × 84 (2 KB)Prince Max
16:10, 3 June 2006Thumbnail for version as of 16:10, 3 June 2006164 × 84 (948 bytes)Szwedzki== Summary == {{Information |Description=MetaPost image of a disc, with dimensions and axes specified. Embedded in a TeX document, viewed with gv, rasterized via screenshot, saved as PNG with The Gimp, and compressed with [

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