Parameters

petrov_eps	Scope: private		REAL
Description: tiny number to judge Petrov type
Range			Default: 1.0e-6
0:

petrov_output_dim	Scope: private		INT
Description: output Petrov type in 2d or 3d
Range			Default: 3
2:2	2D
3:3	3D

pnd_arrowlength	Scope: private		REAL
Description: output arrow length at Mathematica
Range			Default: 0.6
0:

pnd_arrownum	Scope: private		INT
Description: number of points to cal PNDs in one direction
Range			Default: 10
0:

pnd_output	Scope: private		KEYWORD
Description: output PNDs with Hisaaki's Mathmetica form?
Range			Default: no
yes
no	No means no!

pnd_project	Scope: private		KEYWORD
Description: project plane
Range			Default: xy
xy
xz
yz
all

pnd_routine	Scope: private		KEYWORD
Description: GOTO principal null directions routine?
Range			Default: no
yes
no

pnd_tinycut	Scope: private		REAL
Description: tiny number to cutout psi's
Range			Default: 1.0e-6
0:

psif_vec	Scope: private		KEYWORD
Description: Where does the basis vector point?
Range			Default: radial
radial
cartesian
metric_diag
shock

radius_power	Scope: private		INT
Description: Power of radial coordinate to multiply by
Range			Default: 1
1:*

ricci_persists	Scope: private		BOOLEAN
Description: Keep storage for the Ricci variables all the time
			Default: no

ricci_timelevels	Scope: private		INT
Description: Number of time levels for the Ricci variables
Range			Default: 1
1:3

scale_with_radius	Scope: private		BOOLEAN
Description: Multiply all scalars by power of radial coordinate
			Default: no

weyl_persists	Scope: private		BOOLEAN
Description: Keep storage for the Weyl variables all the time
			Default: no

weyl_timelevels	Scope: private		INT
Description: Number of time levels for the Weyl variables
Range			Default: 1
1:3

spatial_order

Scope: shared from ADMMACROS

INT