SYNOPSIS

#include <vips/vips.h>

int im_costra(in, out)
IMAGE *in, *out;

int im_sintra(in, out)
IMAGE *in, *out;

int im_tantra(in, out)
IMAGE *in, *out;

int im_acostra(in, out)
IMAGE *in, *out;

int im_asintra(in, out)
IMAGE *in, *out;

int im_atantra(in, out)
IMAGE *in, *out;

DESCRIPTION

Basic trig functions. The input image is mapped through either cos(3), sin(3) or tan(3) and written to out. All work in degrees.

The size and number of bands are unchanged, the output type is float, unless the input is double, in which case the output is double. Non-complex images only!

RETURN VALUE

Each function returns 0 on success and -1 on error.

COPYRIGHT

National Gallery, 1995.

AUTHOR

J. Cupitt - 21/7/93