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#!F-adobe-helvetica-medium-r-normal--18*
#!N 
#!CDarkGreen #!N  #!Rall775 User-supplied and 
Annotation Glyphs #!N #!EC #!N #!N You may also pass your 
own glyph in as  #!F-adobe-times-bold-r-normal--18*   type #!EF as the object to 
place at each data point. The dimensionality of the positions of 
the glyph must be either 2-D or 3-D, and the connections 
type must be "triangles" or "lines." This glyph can be any 
Data Explorer field (e.g., an imported object, an isosurface, or a 
constructed object).  #!Rtype #!N #!N There are two ways to use 
your own glyphs: as user-supplied glyphs and as annotation glyphs. #!N 
#!N  #!F-adobe-times-medium-i-normal--18*   User-supplied Glyphs #!EF #!N #!N If you pass in 
a single field as  #!F-adobe-times-bold-r-normal--18*   type #!EF , that object is 
used as a glyph. It is drawn large or small depending 
on the data value, and it inherits the color of the 
data point, if present. The size of the object should be 
approximately unity for the default sizing of AutoGlyph to work well. 
Glyphs for scalar fields should be centered at the origin; glyphs 
for vector fields should have their base at the origin and 
the end that you want to point in the direction of 
the vector field at (0, 1, 0); that is, the glyph 
will be stretched along its y-dimension. You can use any combination 
of Scale, Rotate, and Translate to scale, orient, and position your 
template glyph before passing it to AutoGlyph. #!N #!N  #!F-adobe-times-medium-i-normal--18*   Annotation 
Glyphs #!EF #!N #!N If you pass in a group of 
objects as  #!F-adobe-times-bold-r-normal--18*   type #!EF , AutoGlyph interprets these as "annotation 
glyphs." Each object in the group must be a single field. 
It is assumed that you want data values equal to zero 
to be represented by the zero(th) glyph in the group, data 
values equal to one to be represented by the first glyph 
in the group, and so on. #!N #!N Thus the data 
component of  #!F-adobe-times-bold-r-normal--18*   data #!EF in this case must be of 
the type integer, unsigned integer, byte, unsigned byte, short, or unsigned 
short. The size of the glyph in the resulting output will 
be the size of the glyph in the glyph group, modified 
by the scaling factor  #!F-adobe-times-bold-r-normal--18*   scale #!EF . Colors and other 
components will be maintained from the  #!F-adobe-times-medium-i-normal--18*   input glyphs #!EF to 
the output object, rather than from the colors of  #!F-adobe-times-bold-r-normal--18*   data 
#!EF . The  #!F-adobe-times-bold-r-normal--18*   shape #!EF ,  #!F-adobe-times-bold-r-normal--18*   ratio #!EF , 
 #!F-adobe-times-bold-r-normal--18*   min #!EF , and  #!F-adobe-times-bold-r-normal--18*   max #!EF parameters are ignored 
for annotation glyphs. Annotation glyphs should be positioned at the origin. 
You can use any combination of Scale, Rotate, and Translate to 
scale, orient, and position your template glyph before passing it to 
AutoGlyph. #!N #!N Components #!N #!N Creates new "positions" and "connections" 
components. In the case of a 3-D glyph, a "normals" component 
is added for shading purposes. All components that match the dependency 
of the "data" component are propagated to the output; all others 
are not. If the input has "binormals" and "tangent" components, they 
are not propagated to the output. #!N #!N Example Visual Programs 
#!CForestGreen #!N #!N  #!F-adobe-courier-bold-r-normal--18*   #!N AnnotationGlyphs.net ThunderGlyphSheet.net #!N ConnectingScatteredPoints.net UsingGlyphs.net #!N 
PickStreamline.net UsingTextAndTextGlyphs.net #!N ProbeText.net SIMPLE/AutoGlyph.net #!EF #!N #!N #!EC #!N #!N 
See Also #!N #!N  #!Lglyph,dxall856 h Glyph  #!EL  ,  #!Lsample,dxall931 h Sample  #!EL  #!CIndianRed #!N #!N #!N 
 #!F-adobe-times-bold-r-normal--18*   How to Avoid Stretching or Squashing Glyphs  #!Ravoid #!N #!N 
Users often use the Scale module to scale a collection of 
objects prior to rendering, if the axes have very different scales. 
This can cause a problem if the visualization includes glyphs, as 
the glyphs will be stretched or squashed as well. You can 
place the Scale module before Glyph or AutoGlyph, but if you 
want AutoAxes to show the original (rather than the scaled) position 
values, this will not work. One way of solving this problem 
lies in the fact that Glyph and AutoGlyph can accept a 
user-defined Glyph: #!N #!N Give either module a "user-defined" glyph that 
is  #!F-adobe-times-medium-i-normal--18*   inversely #!EF squashed, so that when you use Scale, 
the glyph ends up with the correct shape. Proceed as follows: 
#!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N o Create a 
field with a single point at the origin, using Construct ([0 
0 0], data = 0) for scalar (sphere) glyphs #!N #!I30 
#!N o Feed this field to either module to make a 
single sphere or arrow. #!N #!I30 #!N o Now scale the 
glyph, using a scale factor that is the inverse of the 
one you want to use on the entire data set. For 
example, if you are going to scale your data by [1 
1 .001], then scale the single glyph by [.001 .001 1]. 
#!N #!I30 #!N o Feed this scaled glyph to the second 
parameter of the module, which puts glyphs on all the data 
points. The module will use the squashed glyph as its template. 
After the template is scaled by [1 1 .001], the glyphs 
won't be squashed anymore. #!N #!I30 #!N o A macro, UnsquishGlyphMacro.net, 
which performs this operation, can be found in /usr/lpp/dx/samples/macros. This macro 
(and this technique) works only for scalar data. #!N #!I0 #!N 
#!EF #!N #!N #!N #!EC #!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   Next Topic 
#!EF #!N #!N  #!Lautogra,dxall777 h AutoGrayScale  #!EL  #!N  #!F-adobe-times-medium-i-normal--18*   #!N 