Newsgroup: it.comp.grafica
Titolo: errori di esportazione

ho corel draw 10, mi sono accorto che, disegnando dei cerchi ed esportandoli
in formato HPGL, ovvero con estensione PLT il cerchio mi viene aperto in un
punto, per gli oggetti più+ complessi, nell'esportazione mi deforma
addirittura l'immagine, con ovvi disagi in fase di stampa...
nessuno di voi ha avuto lo stesso problema e/o sa come risolverlo?
può darsi sia un errore nel filtro di esportazione e ne sia stata rilasciata
una nuova release ?
aiutatemi 

Collegandomi al sito Corel mi sono imbattuto in questa pagina che ti
riporto pari pari, spero ti possa aiutare:
HPGL Plotter file (PLT) Technical Notes
  Details
  This document contains some technical notes about CorelDRAW® Graphics
Suite 12's HPGL Plotter file (PLT) filter.
  Answer
  The PLT file format, developed by Hewlett Packard is vector-based. It
is used in programs, such as AutoCAD, for printing drawings on plotters.
Other Corel applications can interpret a SUBSET of the HPGL and HPGL/2
command set. A scaling factor of 1016 plotter units = 1 inch is used.
Importing a PLT file
Corel applications support versions 1 and 2 of PLT file formats although
some features of version 2 are not supported.
You can import images larger than the Corel application's maximum page
size by enabling the Scale option in the HPGL options dialog box, which
lets you resize the imported image.
The curve resolution factor can be set to a value between 0.0 and 1.0
inches. The value can be very precise; up to eight decimal places are
accepted. A setting of 0.0 results in the highest resolution, but it
also greatly increases file size. A curve resolution of 0.004 inches is
recommended.
The PLT file format does not contain color information. Instead, the
various objects in a PLT file have certain pen numbers associated with
them. When imported into a Corel application, each pen number is
assigned a specific color. You can specify the color assigned to a
particular pen, so that you can match the original colors of the
graphic.
The Pen selection list contains 256 pens although not all of the pens
may be assigned. You can change the color assignments by choosing the
pen and then choosing a new color for that pen from the Pen color list
box. Choosing Custom colors brings up a color definition dialog box that
allows you to define a custom color using RGB values.
You can change the pen width assignments by choosing the pen and then
choosing a new width for that pen from the Pen width list box.
You can change the pen velocity by choosing the pen and then choosing a
new velocity for that pen from the Pen velocity list box. This is only
useful for exporting PLT files.
You can set a defined pen to the Unused option. You can also reset the
current Pen Library pen settings to the previously saved settings.
Corel applications support numerous dotted, dashed, and solid line types
of the PLT file format. The pattern number of a line in a PLT file is
translated to a line type pattern.
If the PLT file contains a font that is not on the user's computer, the
PANOSE font matching dialog box will let the user replace the font with
an available one.
Exporting a PLT file
Only the outlines of objects are exported to the PLT file format.
Dotted lines, dashed lines, and arrowheads are mapped to standard line
types of the PLT file format.
Bézier curves are converted to line segments.
Outline thickness and calligraphic settings are lost.
Outline colors are limited to eight: black, blue, red, green, magenta,
yellow, cyan, and brown.
-- 
Ciao Zakka
www.adrianozakka.it