pi as a single-float.
pi
single-float
graphics-ports
The constant fpi is the result of (float cl:pi 1.0). It is a cl:single-float.
fpi
(float cl:pi 1.0)
cl:single-float
2pi f2pi fpi-by-2
CAPI User Guide and Reference Manual (Macintosh version) - 25 Feb 2015
