Other Code Parameters

Other parameters are scattered around the code. They are:

TINY, UTINY, RHOTINY:

These are used in subroutines TSTEP, ADVANCE, and RHOS, respectively, all of which are in advance.f to avoid dividing by zero.

NGRIDX, XMIN, XMAX, NGRIDZ, ZMIN, ZMAX:

These are used in densplot.f to define the memory size and physical size of the grid used for writing the density values.

MAXRHO:

This is the maximum density used to scale the density values in densplot.f.

NAMX:

This is used by subroutines QGRAV, QGRAV2, and QGRAVRAD to estimate the amount of mass contained within a given range of values for grid settings which only include a certain percentage of the mass.

TGR:

This is used by subroutines QGRAV, QGRAV2, and QGRAVRAD when you choose NGR=21. After time TGR has passed, the run will switch from NGR=2 to NGR=1. See Sec. 3.3.2 for more info.

NCMX, NCMY, NCMZ:

These define the memory size of the grid used to calculate the neighbor lists in subroutine NENE in nelist.f.

NITCH:

This defines the number or iterations between writing data to the file restart.sph in subroutine CHKPT in output.f.

TINY:

In subroutine ENOUT in output.f, this is used to avoid dividing by zero.

XMAX, MAXSTP, PI, NRM, NMAX:

These are used in poly.f to define parameters for the Runge-Kutta routine which solves for the polytropic density profile. Edit them at your own risk!

IA, IM, AM, IQ, IR, NTAB, NDIV, EPS, RNMX:

These are used in ran1.f the random number generator. Leave them alone.

MAXTRY, NRGRID:

These are used in the initialization routines to avoid infinite loops. They should never affect the code at all. If they come into play, there are bigger problems afoot.