term% cat index.txt VIEW2D(5) File Formats Manual VIEW2D(5)
NAME
view2d - movie of a function f(x, y, t)
DESCRIPTION
Files of this format are produced by view2d(3), and displayed by com‐
mands in view2d(1). A movie file consists of one or more frames, each
consisting of a header and a sequence of 16-bit signed integer values
for each pixel, scanned left to right and bottom to top. (Left-to-
right is the inner loop.)
The header consists of the 32-bit magic number 0135246, then eight
16-bit integers:
VER is the version number, currently 3.
NX, NY specify the number of pixels in the frame. These may not vary
from frame to frame.
U, V relate pixel values p in the file to user function values f by
p = u + f/2∗∗v.
FIXUV normally 0; 1 if U, V, PMIN, PMAX of first frame give a bound
on the data in the entire file.
PMIN, PMAX
limits of the data; only used when FIXUV=1.
and finally a 16-byte ascii representation of a floating point value:
TIME is a frame index, typically set to simulated time or to an iter‐
ation counter. This need not be uniformly spaced from frame to
frame, but should be nondecreasing.
Any pixel value less than -32766 is treated as an `out of bounds'
marker and is not displayed. Other pixel values lie in the range
[-32765,32765].
SEE ALSO
view2d(1), view2d(3)
VIEW2D(5)