#!F-adobe-helvetica-medium-r-normal--18*
#!N 
#!CDarkGreen #!N  #!Rall24 Specifying Colormap Values 
#!N #!EC #!N #!N You can specify a Colormap value in 
two ways: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N o 
Directly by manipulating a control point. #!N #!I30 #!N o Indirectly 
through the  #!F-adobe-times-bold-r-normal--18*   Add Control Points #!EF dialog box. #!N #!I0 
#!N #!EF #!N The first is quick and approximate. The second 
is slower and precise. #!Cbrown #!N  #!F-adobe-times-medium-r-normal--18*    #!Rcmaped9 #!N Graphics omitted 
from Online Documentation. Please see the manual. #!N #!N Figure 9. 
Colormap Editor for .../example1.net. The four image characteristics controlled by the 
editor (hue, saturation, value, and opacity) are also listed in  #!Lcolmped1,dxall24 t Table 1  #!EL  
. The numerical range for each is 0.0-1.0. For  #!F-adobe-times-bold-r-normal--18*   Hue 
#!EF this range is "r g b r" (red green blue 
red); the current setting corresponds to the red-green-blue spectrum of the 
color column to the left. The column furthest left (RGB) displays 
the red-green-blue color values corresponding to the four settings on the 
right. Note that each setting is determined by a "line" whose 
position can be changed by moving the "control point" at one 
of its ends; the shape of the line can be modified 
by adding control points (see text). The values 0.0 and 2.5000000 
are the minimum and maximum of the data values used in 
the visual program. #!EF #!N #!EC #!N #!N  #!F-adobe-times-bold-r-normal--18*   Specifying approximate 
values: #!EF #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 1. 
Position the mouse cursor in the middle of the large  #!F-adobe-times-bold-r-normal--18*   
Value #!EF rectangle and  #!F-adobe-times-medium-i-normal--18*   double click #!EF the left mouse 
button. Note the changes that result: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N 
#!N #!I30 #!N o A new control point appears (turning the 
vertical line into two line segments) and the  #!F-adobe-times-bold-r-normal--18*   Value #!EF 
button is activated. #!N #!I30 #!N o The data value of 
the new point is displayed in the data range next to 
the color column (the RGB area, color column, and image show 
corresponding changes). #!N #!I0 #!N #!EF #!N #!N #!I30 #!N 2. 
To move the control point, use the left mouse button to 
drag it. The RGB area, color column, data value, and image 
all change accordingly. #!N #!I30 #!N 3. To return Value to 
its previous state, double click on the control point. #!N #!I0 
#!N #!EF #!N  #!F-adobe-times-bold-r-normal--18*   Specifying exact values: #!EF #!N #!I0 #!N 
 #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 1. Select  #!F-adobe-times-bold-r-normal--18*   Edit #!EF in 
the menu bar of the Colormap Editor and then select  #!F-adobe-times-bold-r-normal--18*   
Add Control Points #!EF in the pull-down menu. A dialog box 
appears (see  #!Laddcon10,dxall25 f Figure 10  #!EL  ). #!Cbrown #!N  #!F-adobe-times-medium-r-normal--18*    #!Raddcon10 #!N #!N Graphics 
omitted from Online Documentation. Please see the manual. #!N Figure 10. 
Add Control Points Dialog Box. This dialog box has two interactors: 
The first specifies the actual data value for which a corresponding 
set of Colormap values are to be implemented. The second specifies 
one of the four Colormap values, such as  #!F-adobe-times-bold-r-normal--18*   Hue #!EF 
in this example (see text). #!EF #!N #!EC #!N #!I30 #!N 
2. Click on the  #!F-adobe-times-bold-r-normal--18*   Saturation #!EF rectangle of the Colormap 
Editor. The label button in the editor is activated (recessed) and 
the new interactor label in the  #!F-adobe-times-bold-r-normal--18*   Add Control Points #!EF 
dialog box changes to "Saturation value (0.0 to 1.0)." #!N #!I30 
#!N 3. Click on the data value displayed in the dialog 
box, type in the value 1, and press  #!F-adobe-times-bold-r-normal--18*   Enter #!EF 
. The new value is displayed as 1.00000. #!N #!I30 #!N 
4. Click on the saturation value displayed in the dialog box, 
type in the value  #!F-adobe-times-bold-r-normal--18*   . #!EF 28, and press  #!F-adobe-times-bold-r-normal--18*   
Enter #!EF . The new value is displayed as 0.28000. #!N 
#!I30 #!N 5. Click on  #!F-adobe-times-bold-r-normal--18*   Add #!EF in the dialog 
box: A control point corresponding to the new values in the 
dialog box appears in the  #!F-adobe-times-bold-r-normal--18*   Saturation #!EF rectangle of the 
editor. The RGB area, color column, and image all change accordingly. 
#!N #!I0 #!N #!EF #!N #!N #!N Now that you know 
how to open and execute visual programs and to control the 
images they generate, you can proceed to Tutorial II, which deals 
with various techniques for visualizing data. #!CIndianRed #!N #!N #!N  #!F-adobe-times-bold-r-normal--18*   
Additional Notes on Control Points #!N #!N  #!F-adobe-times-bold-r-normal--18*   Displaying Control Point 
Values #!EF #!N #!N By default the Colormap Editor displays the 
values of all control points. To display the value of an 
individual point: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 1. 
Select in order: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 
a.  #!F-adobe-times-bold-r-normal--18*   Options #!EF in the menu bar of the ColorMap 
Editor #!N #!I30 #!N b.  #!F-adobe-times-bold-r-normal--18*   Display Control Point Data Value 
#!EF in the pull-down menu #!N #!I30 #!N c.  #!F-adobe-times-bold-r-normal--18*   Selected 
#!EF in the pull-down list. #!N #!I0 #!N #!EF #!N #!N 
#!I30 #!N 2. Click on the desired control point in the 
ColorMap Editor (the rectangle containing the control point is automatically activated 
if it is not already activated). The data value corresponding to 
the selected control point appears in the data range next to 
the color column. #!N #!I30 #!N 3. Repeat the preceding selection 
procedure, except click on  #!F-adobe-times-bold-r-normal--18*   All #!EF in the pull-down list 
(instead of  #!F-adobe-times-bold-r-normal--18*   Selected #!EF ). Data values for all control 
points in the  #!F-adobe-times-medium-i-normal--18*   activated #!EF rectangle now appear in the 
data range. #!N #!I0 #!N #!EF #!N #!N #!N  #!F-adobe-times-bold-r-normal--18*   Deleting 
Control Points #!EF #!N #!N You can delete control points one 
at a time or in groups: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N 
#!N #!I30 #!N o To remove control points one at a 
time (in an activated rectangle),  #!F-adobe-times-medium-i-normal--18*   double click #!EF on each 
point to be removed #!N #!I30 #!N o To remove two 
or more points at a time: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N 
#!N #!I30 #!N 1. Select points by either: #!N #!I0 #!N 
 #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N - Shift-clicking: Press the Shift key 
and click on each point to be deleted;  #!F-adobe-times-medium-i-normal--18*   or #!EF 
#!N #!I30 #!N - Drawing a selection box: Hold down the 
left mouse button and drag the cursor to generate a "selection 
box" in the selected rectangle and enlarge it to the desired 
size. Release the button (the box disappears, but any "boxed" points 
are selected). #!N #!I0 #!N #!EF #!N #!N #!I30 #!N 2. 
Select  #!F-adobe-times-bold-r-normal--18*   Edit #!EF in the menu bar and then  #!F-adobe-times-bold-r-normal--18*   
Delete Selected Control Points #!EF in the pull-down menu. All selected 
control points are deleted and the image is updated. #!N #!I0 
#!N #!EF #!N #!N #!I0 #!N #!EF #!N #!N #!N #!EC 
#!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   Next Topic #!EF #!N #!N  #!Lapg,dxall26 h Tutorial II: Editing and Creating Visual Programs  #!EL  #!N 
 #!F-adobe-times-medium-i-normal--18*   #!N 
