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;
outputs (0,0,0,1,-0.5,0) 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, -0.5,0); --- 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 sextuples? Troy Henderson
On 30-5-2012 23:10, Troy Henderson wrote:
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;
outputs
(0,0,0,1,-0.5,0)
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, -0.5,0); ---
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 sextuples?
It looks like sextuples are no basic datatype. I think that the show is just a way to output the internal representation. Of course it would make sense to have sixtuples (I can even think of a generic n-tuple). Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
Hello Troy, if you declare a transform variable (e.g., t), it works: transform t; t := identity rotated 270 yscaled 0.5; show identity transformed t;
(0,0,0,1,-0.5,0)
Greetings Albrecht On Wed, 30 May 2012, Troy Henderson wrote:
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;
outputs
(0,0,0,1,-0.5,0)
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, -0.5,0); ---
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 sextuples?
Troy Henderson
Albrecht, The issue was to be able to define the transform t using its six components. Troy
participants (3)
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Albrecht Kauffmann -
Hans Hagen -
Troy Henderson