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.
VERSIONS
These functions were added in glibc 2.1.
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
C99, POSIX.1-2001, POSIX.1-2008.
NOTES
In glibc 2.11 and earlier, the implementation does something different
(a
stereographic
projection onto a Riemann Sphere).