ref: 1619629835310a1fa326f28dc3a3d0ef6a6d9f79
dir: /sys/man/6/galaxy/
.TH GALAXY 6 .SH NAME galaxy \- representations of n-body simulations .SH DESCRIPTION Files of this format are interpreted by .IR galaxy (1) as describing the inital condition of n-body simulations or the saved state of simulation in progress. A galaxy file is a UTF stream of instruction lines. The instruction is given by the first space delimited word. The following instructions are accepted. .TP .B MKBODY The rest of the line must contain 5 white space delimited double-precision floating point numbers. They represent a body's x coordinate, y coordinate, x velocity component, y velocity component, and size respectively. .TP .B ORIG The rest of the line must contain 2 white space delimited double-precision floating point numbers. They represent the current location of the origin with respect to the view window of .IR galaxy (1). .TP .B DT The rest of the line must contain a double-precision floating point number which determines the time-scale of the simulation. .TP .B SCALE The rest of the line must contain a double-precision floating point number which determines the scale of the view of the simulation. .TP .B GRAV The rest of the line must contain a double-precision floating point number which determines the gravitational constant of the simulation. .SH SEE ALSO .IR galaxy (1)