ff-hopalong.1

.Dd 2024-05-08
.Dt FF-HOPALONG 1
.Os farbfeld-utils
.Sh NAME
.Nm ff-hopalong
.Nd farbfeld program that draws a picture using HOPALONG attractors
.Sh SYNOPSIS
.Nm
<width> <height> <count> <xmin> <xmax> <ymin> <ymax> <A> <B> <C> <X> <Y>
.Sh DESCRIPTION
.Nm
generates a
.Xr farbfeld 5
image using HOPALONG attractors and writes the result to stdout.
.Pp
This program does not read from standard in.
.Pp
In case of an error
.Nm
writes a diagnostic message to stderr.
.Sh EXIT STATUS
.Bl -tag -width Ds
.It 0
Image processed successfully.
.It 1
An error occurred.
.El
.Sh OPTIONS
The filter takes exactly 12 arguments:
   width
   height
   count
   xmin
   xmax
   ymin
   ymax
   A
   B
   C
   X
   Y

The above arguments affects the algorithm and have no clear description. All
of the arguments from xmin to Y can be float values.
.Sh EXAMPLES
$
.Nm
640 480 33360 0 640 0 480 43 12 19 320 240 < image.ff > image-hopalong.ff
.Sh SEE ALSO
.Xr farbfeld 5 ,
.Xr farbfeld-utils 7