VIEW2D(3X) VIEW2D(3X)
NAME
view2d, moviefil - movie of a function f(x, y, t)
SYNOPSIS
view2d(fd, nx, ny, time, u, v, fixuv, pmin, pmax, p)
short p[];
double time;
moviefil(fd, nx, ny, time, outside, f)
float time, outside, f[];
DESCRIPTION
View2d writes a frame in the format view2d(5) onto the file
specified by fd, a file descriptor for an open file. Use
ld(1) option -lview2d. Nx, ny give the grid size. Time is
a (nondecreasing) frame index, typically set to simulation
time or iteration count. U and v describe the relation
between pixel values and user function values:
p = u + f/2**v.
U and v may vary from one frame to the next. When the glo-
bal scaling is known beforehand, put fixuv = 1 and set pmin
and pmax to the limits of the data. (Otherwise put fixuv=0;
pmin and pmax will be ignored.)
P is the nx by ny array of pixel values, with the x index
running fastest. There is a threshold for describing non-
rectangular regions: any pixel value less than or equal to
-32766 is treated as an out of bounds marker and will appear
as black. Other pixel values should lie in the range
[-32765,32765].
Moviefil is an alternate version that is somewhat less flex-
ible but easier to use. It takes floats and scales automat-
ically to shorts. Any array element f[i][j] less than
outside is treated as undefined and will appear as black.
SEE ALSO
view2d(1), view2d(5)