Metapost and graphics

["Richard Hensh" <hensh@math.msu.edu>]

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.

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.

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.

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?

thanks in advance
ricky

+++++++++++++++++++++++++++++++++++++++++++++
\startuseMPgraphic{test}
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
endfig;
\stopuseMPgraphic
%1
\useMPgraphic{test}
%2
\externalfigure[mpgraph.1]
%3
\startMPgraphic
	%same mp code as above.
\stopMPgraphic
+++++++++++++++++++++++++++++++++++++++++++++++++