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2 Examples 3 References and External Links |
Availability, usage
MetaPost is distributed with many current distributions of the TeX and Metafont framework. In particular, it is included in teTeX distribution, common on Linux and Unix (including Mac OS X) platforms.
The encapsulated postscript produced by Metapost is easily included in TeX and LaTeX documents either via standard eps-inclusion commands. Particularly useful is the ability to include this output in the PDFTeX dialect of TeX, thus giving Portable Document Format output from TeX in a single step. This ability is implemented in the LaTeX graphics package, and can be used from plain TeX via the supp-pdf.tex macro file.
Examples
This is a single file example.mp which when processed by the MetaPost interpreter (via the command mpost on Linux) produces three eps files example.1, example.2, example.3. These are pictured on the right.
transform pagecoords;
pagecoords:=identity scaled 10mm shifted (100mm,150mm);
beginfig(1)
fill ((0,0)--(2,0)--(2,1)--(1,1)--(1,2)--(0,2)--cycle)
transformed pagecoords withcolor green;
draw ((2,0)..(2,1)..(1,1)..(1,2)..(0,2))
transformed pagecoords;
drawarrow ((0,0)--(2,2)) transformed pagecoords;
endfig;
beginfig(2)
draw (for i=0 upto 7: dir(135i)-- endfor cycle)
transformed pagecoords;
endfig;
pagecoords:=identity scaled 15mm shifted (100mm,150mm);
beginfig(3);
% declare paths to be used
path p[],p[]t;
% set up points by defining relationships
z1=(0,0); z2=z1+2up;
z3=z1+whatever*dir(60)=z2+whatever*dir(-50);
z4=z3+(-1.5,-.5);
z5=z1+dir(135);
z0=whatever[z1,z2]=whatever[z3,z4];
% set up paths
p0=fullcircle yscaled .5 rotated 45 shifted z0 ;
p1=z2--z4..z0..z3---z1;
p2=p1 cutbefore p0 cutafter p0;
p3=p0 cutbefore p1 cutafter p1;
p4=p2--p3--cycle;
% define transformed versions of paths and points
for i=0 upto 4: p[i]t=p[i] transformed pagecoords; endfor
for i=0 upto 5: z[i]t=z[i] transformed pagecoords; endfor
% do some drawing
fill p4t withcolor (1,1,0.2);
draw z1t--z2t withcolor .5white;
draw z3t--z4t withcolor .5white;
pickup pencircle;
draw p0t dashed withdots scaled .3;
draw p1t dashed evenly;
draw p2t withcolor blue;
draw p3t withcolor red;
label.lrt(btex $z_0$ etex, z0t);
label.llft(btex $z_1$ etex, z1t);
label.top(btex $z_2$ etex, z2t);
label.rt(btex $z_3$ etex, z3t);
label.llft(btex $z_4$ etex, z4t);
for i=0 upto 4:
drawdot z[i]t withpen pencircle scaled 2;
endfor
endfig;
bye
The resulting three eps files can be used in TeX via LaTeX's \\includegraphics command, Plain TeX's \\epsfbox command, or (in Plain pdftex) the \\convertMPtoPDF command from supp-pdf.tex. To view or print the third diagram, this inclusion is necessary, as the TeX fonts are not included in the eps files produced by MetaPost.
References and External Links