NAME
im_sines - creates a spatial sine wave form
SYNOPSIS
#include <vips/vips.h>
int im_sines(image, xsize, ysize, horfreq, verfreq)
IMAGE *image;
int xsize, ysize;
double horfreq, verfreq;
DESCRIPTION
im_sines() creates a float one band image of the a sine waveform in two
dimensions. The sizes of the created image are xsize by ysize. The
number of horizontal and vertical spatial frequencies are determined by
the variables horfreq and verfreq respectively. The function is the
base for creating displayable sine waves and square waves in two
dimensions.
RETURN VALUE
The function returns 0 on success and -1 on error.
SEE ALSO
im_grey(3).
COPYRIGHT
N. Dessipris
AUTHOR
N. Dessipris - 10/05/1991
10 May 1991