摘要
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.)
许可协议
|
本文件采用知识共享署名-相同方式共享 3.0 未本地化版本许可协议授权。 受免責聲明的約束。
|
|
|
- 您可以自由地:
- 共享 – 复制、发行并传播本作品
- 修改 – 改编作品
- 惟须遵守下列条件:
- 署名 – 您必须对作品进行署名,提供授权条款的链接,并说明是否对原始内容进行了更改。您可以用任何合理的方式来署名,但不得以任何方式表明许可人认可您或您的使用。
- 相同方式共享 – 如果您再混合、转换或者基于本作品进行创作,您必须以与原先许可协议相同或相兼容的许可协议分发您贡献的作品。
|
本许可协议标签作为GFDL许可协议更新的组成部分被添加至本文件。http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue
|