.TH APLOT 9.1.SH NAMEaplot \- isometric plots of data arrays.SH SYNOPSIS.B fb/aplot[.B -a][.BI -l lightfile] [.BI -t type] [.BI -r range] [.B -w.I x0 y0 x1 y1].I file.SH DESCRIPTION.I Aplotdraws an anti-aliased isometric perspective plot of the square array of elevations that itreads from.IR file .The output is a picture file, written on standard output..PPOption.B -tspecifies the type of the data in the binary file.  Possible.I typesare.IP.EXs	shorti	intl	longf	floatd	doublec	charu	unsigned char.EE.PPThe default is.BR "-t f" ..PPOption.B -wsets the.B WINDOW=attribute of the output image.By default, the image is drawn in a 640\(mu512 window..PPNormally, the data is scaled to make the plot fill the window.This default scaling can be overridden by option.BR -r ,in which case the data is scaled so that.I rangeis the magnitude of data values that would make a plot that justfills the window vertically..PPOption.B -lgives the name of a file describing how to shade the surface and howshiny the surface is.By default, a not-at-all shiny surface is lit from above by a single light source.The.I lightfilecontains lines of the following forms:.TP.BI light " x y z brightnessspecifies light source of the given brightness shining in direction.RI ( x , y , z\f1).There can be up to 16 light sources.The default light is in direction (2,3,9) and has brightness 1..TP.BI ambient " brightnessspecifies the brightness of then ambient (non-directional) light.The default is 0.02..TP.BI diff " reflectancesets the amount of diffuse reflection from the surface.The default is 0.98..TP.BI spec " reflectancesets the amount of specular reflection from the surface.The default is 0..TP.BI bump " heightsets the width of the specular reflection bump.  Larger numbersproduce tighter (less diffuse) bumps.  The default is 80..PPOption.B -asuppresses writing an.I alphachannel into the output file.By default, the output has.BR CHAN=ma ..SH SOURCE.B /sys/src/fb/aplot.c.SH "SEE ALSO.IR picfile (9.6),.IR filters (9.1).SH BUGSInput files are assumed to use native byte order andfloating point format, and so are not transportable,except under option.BR "-t u" .