gvar - Get Geocap variables and status

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Name

gvar — Get Geocap variables and status

Syntax

set var [gvar variable]

Description

The gvar command in the context set var [gvar variable] will transfer the Geocap variable or status of the variable into the the Tcl variable; in this case var. The gvar command is used in advanced scripting when reading internal Geocap variables or status is necessary.

Arguments

There is a long list of variables that can be attached to the gvar command as an argument.

The following variables are sometimes called the @ variables because one can create a list by the command lst @.

ran

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Result from random draw.

xmin

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Minimum x value of active data.

xmax

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Maximum x value of active data.

ymin

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Minimum y value of active data.

ymax

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Maximum y value of active data.

zmin

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Minimum z value of active data.

zmax

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Maximum z value of active data.

xwin

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Minimum x of graphical window.

xwax

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Maximum x of graphical window.

ywin

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Minimum y of graphical window.

ywax

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Maximum y of graphical window.

zwin

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Minimum z of graphical window.

zwax

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Maximum z of graphical window.

posx

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x position of manipulator.

posy

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y position of manipulator.

posz

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z position of manipulator.

numpoint

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Number of points in active data.

numcell

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Number of cells in active data.

numscalar

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Number of scalars in active data.

nrow

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Number of elements in a row in active grid.

ncol

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Number of elements in a column in active grid.

nlay

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Number of layers in active grid.

xinc

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x increment of active grid.

yinc

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y increment of active grid.

zinc

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z increment of active grid.

dispnum

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Display list number.

rc

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Return code from system: 0=error 1=OK.

cellid

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Cell id from graphical cursor intersection.

pointid

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Point id from graphical cursor intersection.

files

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File number in get and put.

filetype*

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Filetype number of active data.

hasscalar

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Returns 0 if active data has not scalars; 1 if has scalars.

isgrid

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Return 0 if not; 1 if grid.

volume

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Volume number from vol command.

lookup

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Lookup value from lok command.

zsmin

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Minimum z scalar value from active data.

zsmax

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Maximum z scalar value from active data.

zcmin

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Minimum z cell scalar value from active data.

zcmax

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Maximum z cell scalar value from active data.

standev

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Standard deviation from statistical calculation.

mean

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Mean value from statistical calculation.

var

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Free variable used by some commands.

window

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Window number of active graphical window.

wintot

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Total number of windows.

viewports

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Total number of viewports.

activeview

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Active viewport number.

actorid

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Actor id of graphical display element.

xval

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x curosor position.

yval

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y cursor positon.

zval

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z cursor position set in a 3D cube.

sval

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Scalar value of cursor position.

seed

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Seed value in statitical calculation.

median

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Median value from statistical calculation.

mode

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Mode value from statistical calculation.

skewness

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Skewness value from statistical calculation.

kurtosis

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Kurtosis value from statistical calculation.

correlation

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Correlation value from statistical calculation.

horizons

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Number of horizons read into workspace.

data

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Data flag of active data: 0=error 1=OK.

upd

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Up / down flag : up=1 down=-1 .

cubetype

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2D or 3D cube flag.

levels

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Number of contour levels.

area

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Area of area calculation.

distance

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Distance of distance calculation.

value

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Used by various value output.

putnum

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Number of files saved in put.

lc

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Loop counter.

utmzone

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Utm zone of active zone.

hemis

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active hemisphere.

numlookup // number of lookup curves

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Number of lookup curves in lookup calculation.

numpolygon // number of polygon curves

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Number of polygon curves in lookup calculation.

zorigo

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z origo value of image.

slope

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Slope of regression curve.

intercept

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Interception of regression curve.

rangelo

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Low range value of 3D cube.

rangehi

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High range value of 3D cube.

newactorid

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New (current) actor id of graphical display element.

diagonal

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Diagonal of the graphical window.

oldx

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x position of previous cursor.

oldy

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y position of previous cursor.

oldz

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z position of previous cursor.

angle

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Angle of rotated dataset.

locori

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Has local origo in dataset.

The following list represents additional system variables.

datalist

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List of all datasets in workspace including active.

hilist

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List of all datasets in workspace not including active.

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hi | hiname name

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Test if name present in hicore names.

gridlist

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List of only workspace grid names.

polylist // only hicore polydata names

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List of only workspace polydata names.

list name

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List of only workspace name data.

value x|y|z|s number

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Get x,y,z or s value at number position in active data

field

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Get a list of all field data.

fieldnum

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Get a list of all numeric field data.

name | dataname" | *filename

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Get the saved data name of active data.

numeric fielddata

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Check if fielddata is numeric. 0 if not numeric, 1 if numeric.

type | datatype

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Check data type of active data.

data

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Check if valid data is present in active. 0 if invalid, 1 if valid

undef

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Check if polydata contains undefined values.

rotation

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Check if grid or cube have rotation.

fdata" | *fd name

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Get a list of field data in name.

fdata" | *fd exist name

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Check if field data name exists.

number variable

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Check if variable is numeric. 0 if not numeric, 1 if numeric.

replaceblank string

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Replace all blanks in string.

actorid

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Return the actor id of the last graphic display action.

numcom

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Get the number of components in active data.

xscreen

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Get x size in pixels of screen.

yscreen

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Get y size in pixels of screen.

dimension

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Get dimension of dataset: grid or cube.

scalar

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Get existence of scalars in active data. 0 if not present, 1 if present.

numundef

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Get number of undefined in a grid.

Examples

The following example show the use of gvar command.

The task is to split a dataset into cells with 3 points in each cell. It uses advanced Geocap programming.

set numpoi [gvar numpoint] ; # get number of points
set n3 [expr $numpoi / 3]
set pp [points x y z] ; # transfer all points to the pp variable as a list
dhi data ; # delete data in workspace
set i 0
for {set j 0} {$j < $n3} {incr j} {
    for {set k 0} {$k < 3} {incr k} {
        set a [lindex $pp $i] ; # get the x coordinate
        incr i
        set b [lindex $pp $i] ; # get the y coordinate
        incr i
        set c [lindex $pp $i] ; # get the z coordinate
        eval sta $a $b $c ; # stack the coordinates
        incr i
    }
    rea ter ; # read the stack
    mhi data app ; # append data into workspace
}
 
# The result is saved in workspace data

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