Constants

Globals and conversion constants.

C4dynamics includes several constants as global quantities and conversion units. All c4dynamics constants reside directly in the c4dynamics namespace. For example, if c4dynamics is imported as c4d, then the value of pi is given by c4d.pi.

Global Constants

c4dynamics.utils.const.pi

The ratio of a circle’s circumference to its diameter. C4dynamics’ pi is a simple assignment of numpy.pi:

pi = 3.1415926535897932384626433...

Reference

https://en.wikipedia.org/wiki/Pi

c4dynamics.utils.const.g_ms2

Gravity of earth in meter per square second.

g = 9.80665

Reference

https://en.wikipedia.org/wiki/Gravity_of_Earth

c4dynamics.utils.const.g_fts2

Gravity of earth in foot per square second.

g = 32.1740

Reference

https://en.wikipedia.org/wiki/Gravity_of_Earth

Conversion Constants

c4dynamics.utils.const.ft2m

foot to meter.

ft2m = 0.3048

c4dynamics.utils.const.lbft2tokgm2

pound square foot to kilogram square meter.

lbft2tokgm2 = 4.88243

c4dynamics.utils.const.r2d

radians to degrees.

r2d = 57.2958

c4dynamics.utils.const.d2r

degrees to radians.

d2r = 0.0174533

c4dynamics.utils.const.k2ms

knots to meters per second

k2ms = 0.514444