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Jens · Guest

Hello,

I have a problem defining a HPGL coordinate system with "normal" orientation
and all 4 axes so
I can use negative coordinates as well. I have uploaded a jpg-picture which
explains in more
detail what it is that I want to do:

See here:
http://img245.imageshack.us/img245/2360/hpglml7.jpg

The following is the relevant part of my HPGL/PCL code:

*c0T
&f32760Y
&f0X
&u600D
%1B
IN;
SP1;
SC0,1.6933,0,-1.6933,2;
IR0,100,0,100;
PU 50,50;
PD -50,50;
PD -50,-50;
PD 50,-50;
PD 50,50;
%1A
&f1X&f9X&f32760y3X

Can anybody tell me how I configure a HPGL coordinate system which makes it
possible
to use negative coordinates. The origin of the coordinate system must always
be the
latest PCL cursor position. And the coordinate system must have "normal
orientation" where
up is the positive y-direction and right is the positive x-direction.

I hope I have expressed myself in a clear way.

In advance, I would like to say thank you for your answers.