Area Fills; Selecting An Area Fill Pattern - HP 262SA Reference Manual

Graphics
AREA FILLS
The terminal has two types of area fill specifications--rectangular and polygonal. An area can
be filled with one of a variety ofpredefined patterns or with a user-defined pattern. The pattern
can also be used to provide line patterns for horizontal or vertical lines when the area pattern
is selected as the line type. (Refer to (tUsing Area Fills As Line Types".)
When an area fill pattern is selected, the entire screen is divided into 8x8 cells. Each location is
mapped to the corresponding bit in the pattern. When an area fill operation is performed, the
area fill pattern is duplicated to fill the area. The pattern starts at screen coordinates 0,0 (see
Figure D-7 below).
511,389
Sample
Area
Pattern
•
-N-N-N-III-N-N-II-
I
=-:.:K:.:K:•••
iilll
z
NZII-
•
I
::K:.::KN::K.ii.iilll-N
z
. -
I
I
'::K
:z
~
::K ::K
-
-
-
I
••••
_II
•
• til
.N
-=-.
Iii. i·
t
II
• ••
.111
I
-.
z .
t
III
.11
••
II II I
t
:.:.
_II
!II!II
til
-.::.:
I
:z. :z.::.:
I
•
II II II
-
--
8,8
0,0
Figure D-7. How The Area Fill Pattern Is Mapped
Selecting An Area Fill Pattern
The default pattern for area fill is a user-defined pattern. To select the type of area fill pattern
to be used, use the following escape sequence:
Ec .. m <area pat tern>
9
where
<area pat tern>
is selected from:
1
Solid area fill
2
User defined area fill pattern (default)
3
Pattern #0 (short dashed hatching)
4
Pattern #1 (long dashed hatching)
5
Pattern #2 (hatching)
6
Pattern #3 (cross hatching)
7
Pattern #4 (fine cross hatching)
8
Pattern #5 (medium checkerboard)
9
Pattern #6 (fine checkerboard, 1:1 blend)
1 0
Pattern #7 (3: 1 blend)
D-17