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XMOUNTAINS(1) XMOUNTAINS(1)
NAME
xmountains - A fractal landscape generator.
SYNOPSIS
xmountains [ bqgPdEmMrBnZIASTWFGCapcevfRltxsXYH ]
DESCRIPTION
xmountains is a X11 based fractal landscape generator. It generates
random fractal surfaces and displays them in a window. While the pro-
gram is running the fractal is continuously extended on the right and
the image is scrolled from right to left to expose the newly generated
area.
Flags:
-b
Use the root window.
-q
Reset the root window when the program exits. This option is
ignored unless the program is using the root window.
-g [string]
Set the geometry of the window.
-P [filename]
Write the PID to the specified file.
-d [string]
Set the display.
-E
Toggle the way that window repainting is done. By default the
image pixmap is installed as the background pixmap of the window
and window repainting should be performed automatically by the X
server. If this does not work on a particular system then this
flag can be used to enable explicit expose event processing. In
the default mode root window images will remain in place after
the program exits.
-m
Display a map of the surface rather than a perspective view.
-M
Produce reflections in the water. This may be a little slower.
-r [20]
To reduce the load on the X server the program generates several
columns of pixels before scrolling the image. This flag sets the
number of columns. A negative value reverses the direction of
scrolling. A value of zero makes the program scan across the
window without scrolling at all.
-B [80]
Set the number of shades of each colour that the program allo-
cates.
-n [245]
Set a maximum number of colours to use. This is just a different
way of setting the number of shades of each colour.
-Z [10]
Set the number of seconds that the program sleeps after
scrolling the screen.
-I [40.0]
Set the vertical angle of illumination.
-A [0.0]
Set the horizontal angle of illumination.
-S [0.6]
Set the vertical stretch of the surface.
-T [0.5]
Set the vertical shift of the surface.
-W [0.5]
Set the height where the water occurs.
-F [1]
Reduce the variation in the foreground height to ensure a good
view of the surface. This flag sets the number of iterations for
which the foreground height is constrained to a constant value.
-G [-1.0]
Mean altitude for the for foreground.
-C [0.3]
Set the contour parameter. The base colour of a point depends on
its height and how flat the surface is. This parameter controls
the relative importance of these factors.
-a [2.5]
Set the Altitude of the viewpoint.
-p [4.0]
Set the distance of the viewpoint from the front of the surface.
-c [1.0]
Set the contrast parameter. Values too far from 1.0 will give
strange results
-e [0.3]
Set the ambient light level. This is a fractional value that
sets how bright shaded areas will be compared to fully illumi-
nated ground.
-v [0.6]
Set the vertical light level. The program also implements a sec-
ondary light source shining from directly above the surface.
This flag sets how bright this light source is relative to the
main light source.
-f [0.65]
Set the fractal dimension of the surface. This should be in the
range 0.5-1.0.
-R [0]
Set the seed for the random number generator. A value of 0
causes the seed to be set from the clock.
-l [10]
Set the width of the surface. Increasing this value by one dou-
bles the width of the surface.
-t [2]
Set the number of non-fractal iterations. Increasing this value
by one doubles the average number of mountains across the width
of the surface.
-x
Use cross updates (see under -H)
-s [1]
Control the regeneration steps used to reduce creasing. There
are three possible regeneration steps controlled by the first 3
bits of this flag value. (see under -H)
-X [0.0]
regeneration step parameter (see under -H)
-Y [0.0]
regeneration step parameter (see under -H)
-H
Print a short description of the algorithm explaining the -x -s
-X and -Y parameters.
IDENTIFICATION
Author: S.Booth@ed.ac.uk
XMOUNTAINS(1)
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This page was generated on Tue Feb 13 02:16:31 GMT 2007
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