whirlygig -- zooming chains of sinusoidal spots
.SH SYNOPSIS
.B whirlygig
-[\-display \fIhost:display.screen\fP] [\-window] [\-root] [\-background] [\-foreground] [\-xspeed] [\-yspeed] [\-whirlies] [\-nlines]
+[\-display \fIhost:display.screen\fP] [\-window] [\-root] [\-mono]
+[\-install] [\-noinstall] [\-visual arg] [\-window-id arg]
+[\-xspeed arg] [\-yspeed arg] [\-whirlies arg] [\-nlines arg]
+[\-xmode arg] [\-ymode arg] [\-speed arg] [\-trail 1|0]
+[\-color_modifier arg] [\-start_time arg] [\-explain 1|0]
+[\-wrap 1|0] [\-db] [\-no-db]
+
.SH DESCRIPTION
The \flwhirlygig\fP program draws a series of circles on your screen.
They then move about in a cyclic pattern
.TP 8
.B \-xspeed \flspeed\fP
Specify how fast the dots should cycle horizontally.
-Try out values from .01 to 4000
+Try out values from .01 to 4000. Random by default.
.TP 8
.B \-yspeed \flspeed\fP
Specify how fast the dots should cycle vertically.
-Try out values from .01 to 4000
+Try out values from .01 to 4000. Random by default.
+.TP 8
+.B \-xamplitude \flfactor\fP
+Specify the horizonatal amplitude.
+Try out values from .01 to 10. Defaults to 1.0.
+.TP 8
+.B \-yamplitude \flfactor\fP
+Specify the horizonatal amplitude.
+Try out values from .01 to 10. Defaults to 1.0.
.TP 8
.B \-whirlies \fla number\fP
-Specify how many whilrlies you want
+Specify how many whirlies you want (per line). Defaults
+to a random number.
.TP 8
.B \-nlines \flnumber of lines\fP
-Specify how many lines of whirlies you want
+Specify how many lines of whirlies you want. Defaults to a
+random number.
+.TP 8
+.B \-xmode \flmode\fP
+.TP 8
+.B \-ymode \flmode\fP
+Specify which mode to use for calculating the x and y positions of the
+whirlies. Can be any of spin, funky, circle, linear, test, fun, innie
+or lissajous. Defaults to 'change' mode, which randomly selects a new
+mode for x and y every now an then. Unrecognized options default to spin.
+.TP 8
+.B \-explain
+Prints some strings to the window explaining what the initially
+selected modes are, before displaying the whirlies. Off by default.
+.TP 8
+.B \-trail \fl1 or 0\fP
+Trail mode fails to erase the whirlies as they move, so they leave a
+multicoloured trail behind. Doesn't work if the doubled buffered mode
+is using the X server's double buffer extension, and the useDBEclear
+resource is true (which it is by default).
+.TP 8
+.B \-speed \flint\fP
+Specifies how fast to cycle through the internal time. Values 1,2 and
+3 look ok, up to 10 is not too bad, but beyond ends up
+flickery. Adjust xspeed and yspeed instead.
+.TP 8
+.B \-start_time \flint\fP
+Where in the internal time cycle to start. Ranges from 1 to 429496729,
+Defaults to a random value.
+.TP 8
+.B \-xoffset \flfactor\fP
+Tell the whirlies to be offset by this factor of a sin.
+Defaults to 1.0
+.TP 8
+.B \-yoffset \flfactor\fP
+Tell the whirlies to be offset by this factor of a cos.
+Defaults to 1.0
+.TP 8
+.B \-offset_period \flfactor\fP
+Change the period of an offset cycle
+Defaults to 1
+.TP 8
+.B \-color_modifier \flint\fP
+How many colors away from the current should the next whirly be?
+.TP 8
+.B \-wrap \fl1|0\fP
+Causes whirlies that fall off the edge of the screen to wrap over to
+the other end of the screen. Otherwise they disappear and new ones
+to materialize on the other side of the screen. The difference is
+subtle, but it is different. Try it. On by default.
+.TP 8
+.B \-db
+.TP 8
+.B \-no-db
+Use double buffering to reduce flicker. This uses the double buffering
+extension if your X server supports it, otherwise it draws to it's own
+pixmap buffer and copies that to the window, which works almost as
+well. If the resource 'useDBEClear' is true, whirlies are not
+individually erased, so the -trail option won't work, and running
+multiple instances on the root window will flicker.
+
.SH ENVIRONMENT
.PP
.TP 8
projects / xscreensaver / blobdiff