#!F-adobe-helvetica-medium-r-normal--18*
#!N
#!N #!Rautogra AutoGrayScale #!N
#!N Category #!N #!N #!Lcattrn,dxall763 h Transformation #!EL #!N #!N Function #!N #!N Automatically
colors a field using a "gray" scale. #!N #!N Syntax #!CForestGreen
#!N #!N #!F-adobe-courier-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* mapped, colormap #!EF = AutoGrayScale( #!F-adobe-times-bold-r-normal--18* data,
opacity, hue, start, range, #!N saturation, min, max, delayed, #!N outofrange
#!EF ); #!EF #!N #!N #!EC #!N #!N Inputs #!T,1,91,276,461,646 #!F-adobe-times-medium-r-normal--14*
#!F-adobe-times-bold-r-normal--18* #!N TAB Name TAB Type TAB Default TAB Description #!EF
#!N TAB data TAB data field TAB none TAB field to
be colored #!N TAB opacity TAB scalar TAB input dependent TAB
opacity (between 0 and 1) #!N TAB hue TAB scalar TAB
0.0 TAB hue #!N TAB start TAB scalar TAB 0.0 TAB
starting intensity #!N TAB range TAB scalar TAB 1.0 TAB range
of intensity #!N TAB saturation TAB scalar TAB 0.0 TAB saturation
(between 0 and 1) #!N TAB min TAB scalar or data
field TAB min of data TAB minimum of data to be
colored #!N TAB max TAB scalar or data field TAB max
of data TAB maximum of data to be colored #!N TAB
delayed TAB flag TAB 0 TAB 0: apply maps #!N TAB
- TAB - TAB - TAB 1: delay applying color and
#!N TAB - TAB - TAB - TAB opacity maps (byte
data only) #!N TAB outofrange TAB vector list or string list
TAB {"color of min, " "color of max"} TAB how to
color out-of-range data #!N TAB - TAB - TAB - TAB
values #!N TAB - TAB - TAB - TAB #!EF #!N
#!N Outputs #!T,1,161,321,646 #!F-adobe-times-medium-r-normal--14* #!F-adobe-times-bold-r-normal--18* #!N TAB Name TAB Type TAB
Description #!EF #!N TAB mapped TAB color field TAB color-mapped input
field #!N TAB colormap TAB field TAB RGB color map used
#!N TAB - TAB - TAB #!EF #!N #!N Functional Details
#!N #!N This module maps the #!F-adobe-times-medium-i-normal--18* intensities #!EF of a
color ( #!F-adobe-times-bold-r-normal--18* hue #!EF ) to the data values of
a specified field ( #!F-adobe-times-bold-r-normal--18* data #!EF ). #!N #!I0 #!N
#!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* data #!EF #!EF #!I50 #!N is
an input field with data. If the input is a vector
field, the intensities are based on the magnitude of the data.
If the input consists of matrices, the intensities are based on
the determinants. #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* opacity #!EF #!EF #!I50
#!N specifies the opacity of the resulting object. Allowed values range
from 0 to 1. Its default value is 1 for surfaces
and 0.5 for volumes. #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* hue #!EF
#!EF #!I50 #!N sets the hue. Blue is 0.6666, red is
0 or 1, and colors are defined cyclically from -<infinity> to
<infinity> (i.e., #!F-adobe-times-bold-r-normal--18* hue #!EF of -1 = #!F-adobe-times-bold-r-normal--18* hue #!EF
of 0 = #!F-adobe-times-bold-r-normal--18* hue #!EF of 1, and so on).
Note: This parameter will have no effect if #!F-adobe-times-bold-r-normal--18* saturation #!EF
is set to 0 (see below). #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18*
start #!EF and #!F-adobe-times-bold-r-normal--18* range #!EF #!EF #!I50 #!N specify the
intensities applied to the minimum and maximum data values mapped. The
value of #!F-adobe-times-bold-r-normal--18* range #!EF can be any positive number. By
default, the minimum data value has an intensity of 0, and
the maximum an intensity of 1. See also #!Lcvolrnd,dxall820 h Coloring Objects for Volume Rendering #!EL . #!N
#!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* saturation #!EF #!EF #!I50 #!N specifies the
saturation of the colors used. This value must be between 0
(the default) and 1. #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* min #!EF
#!F-adobe-times-medium-r-normal--18* and #!EF #!F-adobe-times-bold-r-normal--18* max #!EF #!EF #!I50 #!N specify the
minimum and maximum data values mapped. If neither is specified, the
minimum and maximum values of #!F-adobe-times-bold-r-normal--18* data #!EF are mapped. If
#!F-adobe-times-bold-r-normal--18* min #!EF is scalar, the minimum data value is mapped
to that value. If #!F-adobe-times-bold-r-normal--18* min #!EF is a data field,
the minimum data value of that field is used. #!N #!N
The #!F-adobe-times-bold-r-normal--18* max #!EF parameter is interpreted in corresponding fashion. If
#!F-adobe-times-bold-r-normal--18* min #!EF is a data field and #!F-adobe-times-bold-r-normal--18* max #!EF
is unspecified, the module uses the minimum and maximum values of
that field. #!N #!N For volumes, regions with values outside the
#!F-adobe-times-bold-r-normal--18* min #!EF - #!F-adobe-times-bold-r-normal--18* max #!EF range are invisible; for
surfaces, such regions are gray by default. #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18*
#!F-adobe-times-bold-r-normal--18* delayed #!EF #!EF #!I50 #!N determines whether "delayed colors" are
created. Such colors are available only for byte data and they
use less memory. #!N #!N When #!F-adobe-times-bold-r-normal--18* delayed #!EF = 1:
#!N #!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N o The "colors"
component is a pointer to the "data" component, and a "color
map" component is created. (This component is a color lookup table
with 256 entries, representing the appropriate color for each of the
256 possible data values.) #!N #!I30 #!N o If #!F-adobe-times-bold-r-normal--18* opacity
#!EF is also specified, an opacity map is created with 256
entries, while the "opacities" component is a copy of the "data"
component. #!N #!I30 #!N o The module adds a "direct color
map" attribute to the output object. (See #!Ludcmps,dxall813 h Using Direct Color Maps #!EL .) #!N #!I0
#!N #!EF #!N #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* outofrange #!EF #!EF
#!I50 #!N specifies the coloring of data that fall outside the
#!F-adobe-times-bold-r-normal--18* min #!EF - #!F-adobe-times-bold-r-normal--18* max #!EF range. This parameter applies
only to surfaces; out-of-range data values for volumes are always invisible.
If the parameter value is a single color (RGB vector or
color-name string), it is applied to both the upper and lower
out-of-range points. If it is a list of two colors, then
it is applied to the lower and upper out-of-range points, respectively.
Color strings can be any of the defined color-name strings (see
#!Lcolor,dxall792 h Color #!EL ) or either of the strings "color of min" and
"color of max." #!I0 #!N #!N #!N #!N #!I0 #!N Notes:
#!N #!I30 #!N 1. Directly displayed grayscale images will use more
distinct colors if you take advantage of direct color maps by
using the #!F-adobe-times-bold-r-normal--18* delayed #!EF parameter. Use Compute to convert your
data to bytes if they are not already in that form.
#!N #!I30 #!N 2. AutoGrayScale adds colors to the "colors" component.
For "front colors" or "back colors," use the Rename module following
AutoGrayScale. #!N #!I30 #!N 3. This module also outputs the RGB
color map used, in the output #!F-adobe-times-bold-r-normal--18* colormap #!EF . The
"positions" component contains the data values, and the "data" component contains
the corresponding RGB colors. You can use this color map as
an input to the ColorBar module. For byte data, the color
map always contains 256 entries for the 256 possible data values.
If the input to AutoGrayScale is a group, then a different
color map will be constructed for each member of the group.
In that case, the #!F-adobe-times-bold-r-normal--18* colormap #!EF output of the module
is a group of color maps. Use the Select module to
select the color map you want to display using ColorBar. #!N
#!I30 #!N 4. If you AutoGrayScale a group of volumes, you
may find that the resulting image is black because the renderer
does not support coincident volumes. #!I0 #!N #!N #!N #!N Components
#!N #!N Adds a "colors" component. An "opacities" component is added
if #!F-adobe-times-bold-r-normal--18* opacity #!EF is less than 1 or the input
data is a volume. If #!F-adobe-times-bold-r-normal--18* delayed #!EF = 1, the
"colors" component is a copy of the "data" component, and a
"color map" component is created. Likewise, an "opacity map" component is
created if #!F-adobe-times-bold-r-normal--18* opacity #!EF is less than 1 or the
input is a volume. #!N #!N Example Visual Program #!CForestGreen #!N
#!N #!F-adobe-courier-bold-r-normal--18* #!N AlternateVisualizations.net #!EF #!N #!N #!EC #!N #!N See
Also #!Lcolor,dxall792 h Color #!EL , #!Lautocol,dxall772 h AutoColor #!EL , #!Lcolorba,dxall793 h ColorBar #!EL #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next
Topic #!EF #!N #!N #!Lautgrid,dxall778 h AutoGrid #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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