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Subject: Re: Metapost and graphics
Date: Mon, 24 Apr 2000 07:22:41 +0200
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>Hello,
>
>I'm new to ConTeXt and interested in including graphs in my
documents. Since
>PSTricks doesn't appear to be supported I've turned to
METAPOST. I have some
>questions about the code below.

You can say: \usemodule[m-pstric] but indeed that does not work
with pdf. 

>1. I've tried some of the examples from the MP docs and
occasionally, the
>"test" graphic fails when the beginfig(1)/endfig pair is
included.

That is because your beginfig overloads the automatic ones. So,
no beginfig etc is needed.

>2. Which is the preferred way to call the "test" image, (1) or
(2) (see
>below)?
>
>3. What is the purpose of the pair
\startMPgraphic...\stopMPgraphic? It
>doesn't seem to do anything.

I bet it does. Add \runMPgraphicstrue (can also go in
cont-sys.tex) and enable write18 in texmf.cnf and you will see
that context generates the graphics runtime (otherwise they are
generated between runs)

>In the docs that I've found, there doesn't seem to be much on
METAPOST info.
>For example, the "graph" package isn't supported. Is there a
more extensive
>discussion of ConTeXt support of METAPOST somewhere?

As far as I know the graph package should work. You can always
make external figures and include them with \externalfigure. 

>\startuseMPgraphic{test}
#### this wone is not needed >beginfig(1);
>	u=1cm;
>	draw (2u,2u)--(0,0)--(0,3u)--(3u,0)--(0,0);
>	pickup pencircle scaled 4pt;
>	for i=0 upto 2:
>	  for j=0 upto 2:
>		 draw (i*u,j*u);
>	  endfor
>	endfor
#### nor is this one >endfig;
>\stopuseMPgraphic
>%1
>\useMPgraphic{test}

ok, should work now

>%2
>\externalfigure[mpgraph.1]

no, but when you make a graphic outside context you can say: 

\externalfigure[somefile.123]

>%3
>\startMPgraphic
>	%same mp code as above.
>\stopMPgraphic

You need to provide a name like {test}

Remark: when color is disables, contextwill automatically
convert color in MP files into weighted grayscales. \

Hans