cproj, cprojf, cprojl − project into Riemann Sphere
Math library (libm, −lm)
#include <complex.h>
double
complex cproj(double complex z);
float complex cprojf(float complex z);
long double complex cprojl(long double complex
z);
These functions project a point in the plane onto the surface of a Riemann Sphere, the one-point compactification of the complex plane. Each finite point z projects to z itself. Every complex infinite value is projected to a single infinite value, namely to positive infinity on the real axis.
For an explanation of the terms used in this section, see attributes(7). |
C11, POSIX.1-2008.
glibc 2.1. C99, POSIX.1-2001.
In glibc 2.11 and earlier, the implementation does something different (a stereographic projection onto a Riemann Sphere).
cabs(3), complex(7)