Plan 9 - man page for aplot (plan9 section 9)
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aplot - isometric plots of data arrays
fb/aplot [ -a ] [ -llightfile ] [ -ttype ] [ -rrange ] [ -w x0 y0 x1 y1 ] file
Aplot draws an anti-aliased isometric perspective plot of the square array of elevations
that it reads from file. The output is a picture file, written on standard output.
Option -t specifies the type of the data in the binary file. Possible types are
u unsigned char
The default is -t f.
Option -w sets the WINDOW= attribute of the output image. By default, the image is drawn
in a 640x512 window.
Normally, the data is scaled to make the plot fill the window. This default scaling can
be overridden by option -r, in which case the data is scaled so that range is the magni-
tude of data values that would make a plot that just fills the window vertically.
Option -l gives the name of a file describing how to shade the surface and how shiny the
surface is. By default, a not-at-all shiny surface is lit from above by a single light
source. The lightfile contains lines of the following forms:
light x y z brightness
specifies light source of the given brightness shining in direction (x,y,z). There
can be up to 16 light sources. The default light is in direction (2,3,9) and has
specifies the brightness of then ambient (non-directional) light. The default is
sets the amount of diffuse reflection from the surface. The default is 0.98.
sets the amount of specular reflection from the surface. The default is 0.
sets the width of the specular reflection bump. Larger numbers produce tighter
(less diffuse) bumps. The default is 80.
Option -a suppresses writing an alpha channel into the output file. By default, the out-
put has CHAN=ma.
Input files are assumed to use native byte order and floating point format, and so are not
transportable, except under option -t u.
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