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.PLT 文件格式详解

HPGL

.PLT

文件格式

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HPGL .PLT 文件格式详细描述 This "HP-GL Reference Guide" is described only within the HP-GL command and parameter which are often used. The HP-GL sample has carried the result displayed by PloView.

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Returns to English HP

This "HP-GL Reference Guide" is described only within the HP-GL

command and parameter which are often used. The HP-GL sample has

carried the result displayed by PloView.

Table of contents

1. Grammar of HP-GL Command

2. Coordinate System

-Plotter coordinate system

-User coordinate system

3. Setup of Plotter

-IN(Initialize)

-DF(Defalt)

-IP(Input P1 and P2)

-SC(Scale)

4. Basic Plot Command

-SP(Select Pen)

-PU(Pen Up)

-PD(Pen Down)

-PA(Plot Absolute)

-PR(Plot Relative)

-LT(Line Type)

5. Plot of Circle, Arc, and Polygon

-CT(Chord Tolerance)

-CI(Circle)

-AA(Arc Absolute)

-AR(Arc Relative)

-FT(Fill Type)

-PT(Pen Thickness)

-WG(Fill Wedge)

-EW(Edge Wedge)

-RA(Fill Absolute)

-EA(Edge Rectangle Absolute)

-RR(Fill Rectangle Relative)

Page

GL Reference Guide

2012

http://www.isoplotec.co.jp/HPGL/eHPGL.htm

-ER(Edge Rectangle Relative)

-PM(Polygon Mode)

-EP(Edge Polygon)

-FP(Fill Polygon)

6. Character Plot Command

-LB(Label)

-DT(Define Terminator)

-SI(Absolute Character Size)

-SR(Relative Character Size)

-SU(User Unit Character Size)

-SL(Character Slant)

-DI(Absolute Direction)

-DR(Relative Direction)

-DU(User Unit Direction)

-DV(Vertical Label Direction)

-LO(Label origin)

-CP(Character Plot)

-ES(Extra Space)

-BL(Buffer Label)

-PB(Print Bufferd Label)

-CS(Designate Standard Character Set)

-CA(Designate Alternate Character Set)

-SS(Select Standard Character set)

-SA(Select Alternate Character Set)

7. Change of Plot Area

-IW(Input window)

-RO(Rotate Coodinate System)

8. Plotter Control

-PG(Page)

-AF(Advance Full Page)

-NR(Not Ready)

-PS(Paper Soze)

9. Contact us

1. Grammar of HP-GL Command

The command of HP-GL consists of the command section of the alphabet of two

characters, the parameter section, and the terminator section, as shown below.

To use plural parameters for the next of the command section, it is necessary

to divide each parameter with a separator.

Example :PA5000,1000;

Page

GL Reference Guide

2012

http://www.isoplotec.co.jp/HPGL/eHPGL.htm

(command) PA

(parameter) 5000

(separator) ,

(parameter) 1000

(terminator) ;

The default separator is comma and the default terminator is semicolon. In

addition, the terminator of LB and BL command is end-off text code ETX. That

is, it is 3 in an ASCII code decimal number.

Space, C/R, and L/F code are ignored except the label under LB and BL command.

The parameter which came out by the last command is remembered, and forward

parameter will be used if parameter is omitted.

Return to first

2. Coordinate System

Coordinate systems is 2-dimensional XY rectangular coordinate.

-Plotter coordinate system

XY unit of minimum plotter movement is 0.025mm. This is made into one unit and

indicated integrally. The possible range of drawing changes with plotter kinds.

-User coordinate system

Coordinates can be specified by user system of coordinates by setting up

beforehand scale and origin which are converted into plotter system of

coordinates from user system of coordinates combining IP command and SC

command. If this setup is not carried out, plotter system of coordinates will

be used. In addition to integer, X and Y of user system of coordinates can use

real number.

Return to first

3. Setup of Plotter

-IN(Initialize)

Plotter is changed into initial state.

IN;

-DF(Defalt)

Plotter is turned into normal condition.

DF;

DF command does not affect the next state. In addition, the next state also

changes IN command into initial state.

Position of P1 and P2

The present pen, its position, up/down

Page

GL Reference Guide

2012

http://www.isoplotec.co.jp/HPGL/eHPGL.htm

-IP(Input P1 and P2)

It is used together with SC command which is explained by the following clause

and which sets up scale and origin position of system of coordinates. Scaling

points P1(p1x, p1y) and P2(p2x, p2y) are set up.

IP p1x,p1y,p2x,p2y;

P1(p1x, p1y) and P2(p2x, p2y) are plotter coordinates.

IP; It returns to P1 and P2 of different initial state for each plotter kind.

-SC(Scale)

To scaling points P1(p1x, p1y) and P2(p2x, p2y) set up by IP command of

preceding clause, position of user coordinates is assigned and it changes to

user system of coordinates.

SC xmin,xmax,ymin,ymax;

(xmin, ymin) of user coordinates are to P1 (p1x, p1y) of plotter coordinates,

(xmax, ymax) of user coordinates assign P2 (p2x, p2y) of plotter coordinates.

The next command is used for returning to plotter system of coordinates from

user system of coordinates.

SC;

Example 1: left figure

User system of coordinates (X: 0..100, Y:0..100) are assigned to plotter

system of coordinates (X: 0..4000, Y:0..4000). User system of coordinates

become the same unit as mm.

Example 2: right figure

User system of coordinates (X:-75..300, Y:-75..225) are assigned to plotter

system of coordinates (X:-6000..24000, Y:-6000..18000). User system of

coordinates become twice mm.

Return to first

4. Basic Plot Command

Page

GL Reference Guide

2012

http://www.isoplotec.co.jp/HPGL/eHPGL.htm

-SP(Select Pen)

Pen is selected. Although the range of pen number changes with plotter kinds,

it is 0..255 at the maximum.

SP PenNumber;

SP0; It store pen which plotter has in pen plotter.

-PU(Pen Up)

Pen is raised.

PU;

Pen is raised and, next, it moves to position of coordinates (x, y). In

addition, absolute coordinate (PA command) or relative coordinate (PR command)

by which coordinates were used before is used. Initial value is absolute

coordinate.

PU x,y(,x,y...);

If plural(x, y) are continued, it will move to those positions at the order.

-PD(Pen Down)

Pen is lowered.

PD;

Pen is lowered and, next, it moves to position of coordinates (x, y). In

addition, absolute coordinate (PA command) or relative coordinate (PR command)

by which coordinates were used before is used. Initial value is absolute

coordinate.

PD x,y(,x,y...);

If plural(x, y) are continued, it will move to those positions at the order.

-PA(Plot Absolute)

Pen is moved to position of absolute coordinate (x, y).

PA x,y(,x,y...);

If plural(x, y) are continued, it will move to those positions at the order.

SamplePA.hgl: Draw rectangle.

IN;IP0,0,4000,4000;SC0,100,0,100;

SP1;

PA0,0;

PD;

PA100,0;

PA100,100;

PA0,100;

PA0,0;

PU;

Page

GL Reference Guide

2012

http://www.isoplotec.co.jp/HPGL/eHPGL.htm

剩余25页未读，继续阅读

mr_liyonghong

2019-08-08

还好吧，这个格式没人能够完全说明白

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