HP 50G, User Manual

Page: 743 / 887

Page 22-28
ANIMATE is available by using
„°L
@)GROB
L
@ANIMA
). The animation
will be re-started. Press
$
to stop the animation once more. Notice that the
number 11 will still be listed in stack level 1. Press
ƒ
to drop it from the
stack.
Suppose that you want to keep the figures that compose this animation in a
variable. You can create a list of these figures, let’s call it WLIST, by using:
11 „°
@)TYPE@ @ LIST
³ ~~wlist~ K
Press
J
to recover your list of variables. The variable
@WLIST
should now be
listed in your soft-menu keys. To re-animate this list of variables you could use
the following program:
«
Start program
WLIST Place list WLIST in stack
OBJ Decompose list, stack level 1 = 11
ANIMATE Start animation
» End program
Save this program in a variable called RANIM (Re-ANIMate). To run it, press
@RANIM
.
The following program will animate the graphics in WLIST forward and
backwards:
« Start program
WLIST DUP Place list WLIST in stack, make extra copy
REVLIST + Reverse order, concatenate 2 lists
OBJ Decompose list in elements, level 1 = 22
ANIMATE Start animation
» End program
Save this program in a variable called RANI2 (Re-ANImate version 2). To run
it, press
@RANI2
. The animation now simulates a ripple in the surface of
otherwise quiescent water that gets reflected from the walls of a circular tank
back towards the center. Press
$
to stop the animation.