Graphic Commands - HP 39gs User Manual

Graphic commands

DISPLAY→
→
DISPLAY
→GROB
GROBNOT
GROBOR
Programming
Example
TLINE 0;0;3;3:
Erases previously drawn 45 degree line from (0,0) to
(3,3), or draws that line if it doesn't already exist.
The graphic commands use the graphics variables G0
through G9—or the Page variable from Sketch—as
graphicname arguments. The position argument takes the
form (x,y). Position coordinates depend on the current
aplet's scale, which is specified by Xmin, Xmax, Ymin,
and Ymax. The upper left corner of the target graphic
(graphic2) is at (Xmin,Ymax).
You can capture the current display and store it in G0 by
simultaneously pressing
Stores the current display in graphicname.
DISPLAY→ graphicname:
Displays graphic from graphicname in the display.
→DISPLAY graphicname:
Creates a graphic from expression, using font_size, and
stores the resulting graphic in graphicname. Font sizes
are 1, 2, or 3. If the fontsize argument is 0, the HP 39gs
creates a graphic display like that created by the SHOW
operation.
→GROB graphicname;expression; fontsize:
Replaces graphic in graphicname with bitwise-inverted
graphic.
GROBNOT graphicname:
Using the logical OR, superimposes graphicname2 onto
graphicname1. The upper left corner of graphicname2 is
placed at position.
GROBOR graphicname1;(position);graphicname2:
Example
GROBOR G0; (1,1); G1:
+ .
18-21