Flat Circles
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Flat Circles

 
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Tony Nichols
Guest
Posted: Thu Dec 02, 2004 12:50 am    Post subject: Flat Circles Reply with quote
I am having a problem creating HPGL/2 (.PLT) files that have smooth (non flat) circles. I have a VBA routine that captures the plotting area and issues a plot command using a PC3 file to generate the PLT file. When I review the PLT file the circles have flat spots.

I have made sure the VIEWRES is set to 10000 before sending the plot but I still get flat segments. I also have made sure that WHIPARC is set to 0 (off).

The bizarre issue is when the same PC3 is used to send the data to a printer the circles are not printed with flat segments. This is being tested through the same VBA program that sends the file to the printer instead of creating a PLT file. All the settings are the same except send the data to the printer instead of creating a PLT file.

The problem is occurring on a machine running Mechanical Desktop/AutoCAD 2000i. The same file is checked on a machine running AutoCAD 2002 and the flat segments are not generated on the AutoCAD 2002 machine.

If anyone has suggestions of setting changes I have not mentioned I would appreciate the feedback.

Regards,
Tony Nichols

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Dean Saadallah
Guest
Posted: Thu Dec 02, 2004 1:02 am    Post subject: Re: Flat Circles Reply with quote
Since the circles plot fine regardless, I would suspect the utility you
don't mention that "When I review the PLT file the circles have flat spots".

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--
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John Schmidt
Guest
Posted: Thu Dec 02, 2004 2:11 am    Post subject: Re: Flat Circles Reply with quote
Are you possible plotting a non-wireframe view. Try setting the view to
2D-wireframe.

John

"Tony Nichols" <nospam@address.withheld> wrote in message
news:28442729.1101930688735.JavaMail.jive@jiveforum1.autodesk.com...
Quote:
I am having a problem creating HPGL/2 (.PLT) files that have smooth (non
flat) circles. I have a VBA routine that captures the plotting area and

issues a plot command using a PC3 file to generate the PLT file. When I
review the PLT file the circles have flat spots.
Quote:

I have made sure the VIEWRES is set to 10000 before sending the plot but I
still get flat segments. I also have made sure that WHIPARC is set to 0

(off).
Quote:

The bizarre issue is when the same PC3 is used to send the data to a
printer the circles are not printed with flat segments. This is being

tested through the same VBA program that sends the file to the printer
instead of creating a PLT file. All the settings are the same except send
the data to the printer instead of creating a PLT file.
Quote:

The problem is occurring on a machine running Mechanical Desktop/AutoCAD
2000i. The same file is checked on a machine running AutoCAD 2002 and the

flat segments are not generated on the AutoCAD 2002 machine.
Quote:

If anyone has suggestions of setting changes I have not mentioned I would
appreciate the feedback.

Regards,
Tony Nichols


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Govert J. Knopper
Guest
Posted: Thu Dec 02, 2004 12:52 pm    Post subject: Re: Flat Circles Reply with quote
Almost all AutoCAD HPGL(2) plotter drivers produce "circles" that are
actually regular polygons, built from a series of very short straight
line segments (they only look like circles when printed on paper). I
have found only one HPGL(2) driver that produces real circles, the "Oce
9600 NGC 1.x 2.x" HDI driver.

Govert

Tony Nichols wrote:
Quote:
I am having a problem creating HPGL/2 (.PLT) files that have smooth (non flat) circles. I have a VBA routine that captures the plotting area and issues a plot command using a PC3 file to generate the PLT file. When I review the PLT file the circles have flat spots.

I have made sure the VIEWRES is set to 10000 before sending the plot but I still get flat segments. I also have made sure that WHIPARC is set to 0 (off).

The bizarre issue is when the same PC3 is used to send the data to a printer the circles are not printed with flat segments. This is being tested through the same VBA program that sends the file to the printer instead of creating a PLT file. All the settings are the same except send the data to the printer instead of creating a PLT file.

The problem is occurring on a machine running Mechanical Desktop/AutoCAD 2000i. The same file is checked on a machine running AutoCAD 2002 and the flat segments are not generated on the AutoCAD 2002 machine.

If anyone has suggestions of setting changes I have not mentioned I would appreciate the feedback.

Regards,
Tony Nichols
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Tony Nichols
Guest
Posted: Fri Dec 03, 2004 12:52 am    Post subject: Re: Flat Circles Reply with quote
Dean,

I failed to mentioned when the PLT file is actually plotted the circles are not smooth.

Thanks for the input.

Tony
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Dean Saadallah
Guest
Posted: Fri Dec 03, 2004 12:57 am    Post subject: Re: Flat Circles Reply with quote
See John's reply then, sound like his idea may be it.

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--
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Tony Nichols
Guest
Posted: Fri Dec 03, 2004 1:33 am    Post subject: Re: Flat Circles Reply with quote
Govert,

Thanks for the tip. I tried setting up an PC3 file based on the Oce 9600 and the PLT file was much better than the HP5si produced PLT file.

Regards,
Tony
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