[metapost] MetaPost transformation

Troy Henderson thenders at gmail.com
Wed May 30 23:10:17 CEST 2012

I've encountered a MetaPost issue, and since many MetaPost users also use
ConTeXt (and vice-versa), I am posting this question on both lists.

The command

> show identity rotated 270 yscaled 0.5;



as expected, while the command

> show identity transformed (0,0,0,1,-0.5,0);

errors with

! Missing `)' has been inserted.
<to be read again>
l.26 ^^Ishow identity transformed (0,0,0,1,

I am using MetaPost 1.504, and the problem seems to be that MetaPost does
not like me using the sextuple (0,0,0,1,-0.5,0) directly, but this is the
most convenient method for me to describe my transformations.  Is this a
bug in MetaPost, or am I not allowed to use transformations directly with

Troy Henderson
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