[texhax] About draw lens

Darío darioslc at gmail.com
Wed Jun 6 21:27:28 CEST 2012

Hi list, I need insert lens in a article. I tried as example, the code
shown in the fie:
and could not insert the lens and ray, many errors. I just need a lens
and two point, only, but is really complicated.
The packages I used are:


Any suggestions?

Thanks all

Por favor, no utilice formatos de archivo propietarios para el intercambio
de documentos, como ser DOC, XLS, BMP, PPT, RAR, MP3, DWG,
MOV, FLV, WMV, etc.  sino  ODT, ODS, DJVU, PDF, TXT,
CSV, PNG, FLAC, OGV, GZ o cualquier otro que no obligue a utilizar
un programa de un fabricante concreto.
Info: http://www.gnu.org/philosophy/no-word-attachments.es.html
 ,              ,
/                \
 `-_---' `---_-'
  `--|o` 'o|--'
     \  `  /
      ): :(

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