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Plan 9 - man page for aplot (plan9 section 9)

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APLOT(9.1)									       APLOT(9.1)

       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

	      s    short
	      i    int
	      l    long
	      f    float
	      d    double
	      c    char
	      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
	      brightness 1.

       ambient brightness
	      specifies  the  brightness of then ambient (non-directional) light.  The default is

       diff reflectance
	      sets the amount of diffuse reflection from the surface.  The default is 0.98.

       spec reflectance
	      sets the amount of specular reflection from the surface.	The default is 0.

       bump height
	      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.


       picfile(9.6), filters(9.1)

       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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