Texas Instruments TI-89 Titanium Short User Manual page 228

PtOn
CATALOG
x y
PtOn ,
xList yList
PtOn ,
Displays the Graph screen and turns on the screen
pixel nearest to window coordinates
( , ).
x y
ptTest()
CATALOG
) ⇒
x y
ptTest ( ,
xList
ptTest ( ,
Returns
screen pixel nearest to window coordinates (
is on.
PtText
CATALOG
string
PtText ,
Displays the Graph screen and places the
character string
nearest the specified (
is positioned with the upper-left corner of
string
its first character at the coordinates.
PxlChg
CATALOG
row col
PxlChg ,
rowList
PxlChg
Displays the Graph screen and reverses the pixel
at pixel coordinates (
Note: Regraphing erases all drawn items.
PxlCrcl
CATALOG
row col
PxlCrcl ,
Displays the Graph screen and draws a
circle centered at pixel coordinates (
) with a radius of
col
If
drawMode
(default).
If
drawMode
If
drawMode
circle.
Note: Regraphing erases all drawn items.
See also
PxlHorz
CATALOG
row
PxlHorz [,
Displays the Graph screen and draws a horizontal
line at pixel position
If
drawMode
If
drawMode
If
drawMode
off to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See
also
LineHorz
222
Boolean constant expression
) ⇒
yList Boolean constant expression
or . Returns
true false
x y
,
on the screen at the pixel
string
) window coordinates.
x, y
colList
,
, ).
row col
r drawMode
, [, ]
pixels.
r
= 1, draws the circle
= 0, turns off the circle.
= -1, inverts pixels along the
.
Circle
drawMode
]
.
row
= 1, draws the line (default).
= 0, turns off the line.
= -1, turns a line that is on to off or
.
PtOn 3,5 ¸
ptTest(3,5) ¸
only if the
true
, )
x y
PtText "sample",3,5 ¸
PxlChg 2,4 ¸
@
PxlCrcl 40,80,30,1 ¸
H
PxlCrcl 50,125,40,1 ¸
,
row
PxlHorz 25,1 ¸
Appendix A: Functions and Instructions
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