![](https://secure.gravatar.com/avatar/44ca9eda7aaa681c0e3b3e90125c56b0.jpg?s=120&d=mm&r=g)
Oliver Buerschaper schrieb:
Hi there,
maths can sometimes be weird and even more so the kinds of formulas one needs to typeset occasionally ;-)
So here I need to typeset triangles and a variety of other polygons right in the middle of a display formula. What I've been able to come up with so far is something like this:
--- \starttext
\startuseMPgraphic{tetrahedral} u := 10pt; draw (0,0)--(2u,0)--(u,sqrt(3)*u)--cycle; \stopuseMPgraphic
The bounding box of the graphic is set on the base line. So you have to add some artificial depth to the graphic. \starttext \startreusableMPgraphic{tetrahedral} begingroup u := 10pt; draw (0,0)--(2u,0)--(u,sqrt(3)*u)--cycle; draw boundingbox currentpicture withpen pensquare scaled .1; endgroup; \stopreusableMPgraphic \def\Tetrahedral{\lower5pt\hbox{\reuseMPgraphic{tetrahedral}}}% needs some fiddling :) \startformula \Phi(\Tetrahedral)=F_{kln}^{ijm}\,v_iv_jv_kv_l\, \delta_{j^*nk^*}\,\delta_{l^*n^*i^*}\,\Phi(\emptyset) \stopformula \stoptext Best wishes, Peter
\startformula \Phi(\useMPgraphic{tetrahedral})=F_{kln}^{ijm}\,v_iv_jv_kv_l\, \delta_{j^*nk^*}\,\delta_{l^*n^*i^*}\,\Phi(\emptyset) \stopformula
\stoptext ---
Now if I only knew how to properly align my MetaPost figure with the rest of the formula … any ideas?
Cheerio, Oliver ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________