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.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
Interface
Attribute
Value
cproj (), cprojf (), cprojl ()
Thread safety
MT-Safe
STANDARDS
C11, POSIX.1-2008.
HISTORY
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).