Specifications

Revision C 16/01/96
Chapter 8 "HP-GL2" 41
SV - Screened Vectors
SV [ s [, option _1[, option _2]]] [;]
s : screen type
option_1 and option_2: dependent on the screen type
• This command selects the type of screening that will be applied to vectors, arcs, circles and edges of
polygons, rectangles and wedges.
• The screen type must have the value 0, 1, 2, 21, 22 or 130. 0 = no screen, 1 = shaded fill ( one of eight
gray scales ), 2 = raster fill as defined by the RF command, 21 = a pre-defined PCL cross-hatch pattern and
130 = shaded fill ( one of sixty-four gray scales ).
• With screen type 1 option_1 specifies the percentage of shading (0-100): option_2 is ignored.
• With screen type 2 option_1 is used to specify the index number of the fill pattern created using the RF
command. Option_2 is set to either 0 or 1: 0 means that the fill will appear in the colour of pen number 1,
1 means it should appear in the current pen's colour.
• With screen type 21 option 1 specifies one of six predefined PCL cross-hatch patterns (patterns 1 - 6).
option 2 is ignored.
• With screen type 22, option 1 specifies the ID number of PCL user-defined pattern which is defined by the
ESC*c#W command. option 2 is ignored.
• With fill screen type 130 option 1 specifies the percentage of shading ( 0 - 100 ): option 2 is ignored.
• If option 1 and option 2 are omitted, the most recently specified values for these parameters, for the
specified screen type, are used.
• All screening patterns use the current anchor corner.
• Invoking the command with no parameter turns screening off. This is equivalent to SV0;
10 '-Screened Vectors-
20 WIDTH "LPT1:", 255
30 LPRINT CHR$(27); "E";
40 LPRINT CHR$(27); "%0B";
50 LPRINT "IN;SP1;";
60 LPRINT "SV1,15;PA4000,5000;CI500;"
70 LPRINT "SV1,50;PA5000,4000;CI400;"
80 LPRINT "SV1,100;PA6000,6000;CI300;"
90 LPRINT "PW10;SV21,5;PA2000,1000;PD;AA0,0,90;PC;"
100 LPRINT "PW5;SV21,3;PA6000,6000;CI500;"
110 LPRINT "PW7;SV21,6;PA2000,8000;PDPA5000,8000;PU;"
120 LPRINT "PW7;SV21,6;PA2000,8000;PDPA5000,8000;PU;"
130 LPRINT "1,1,0,0,0,0,0,0,1,1,";
140 LPRINT "0,0,1,1,0,0,1,1,0,0,";
150 LPRINT "0,0,0,0,1,1,0,0,0,0,";
160 LPRINT "0,0,1,1,0,0,1,1,0,0,";
170 LPRINT "1,1,0,0,0,0,0,0,1,1;";
180 LPRINT
"PW15;SV2,3;PA4000,2000;PM0;PD6000,2000,6000,4000,4000,4000;PM1;PM2;EP;
"
190 LPRINT CHR$(27); "%0A";
200 LPRINT CHR$(27); "E";
210 END
<Sample 44>