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#!N
#!CSeaGreen #!N #!Rtstmln3 Streamlines #!N #!EC
#!N #!N The #!F-adobe-times-bold-r-normal--18* Streamline #!EF module traces the path of
a massless particle through a static velocity field. #!N #!I0 #!N
#!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N 1. Open and execute visual program
.../Streamlines3D.net. The image is a translucent isosurface with a single streamline
starting from the point [25000 5000 25000] (as specified in the
#!F-adobe-times-bold-r-normal--18* Streamline #!EF module's configuration dialog box). This streamline can be
transformed into a ribbon: #!N #!I30 #!N 2. Select #!F-adobe-times-bold-r-normal--18* Annotation
#!EF in the categories palette and then #!F-adobe-times-bold-r-normal--18* Ribbon #!EF in
the tools palette. #!N #!I30 #!N 3. Position the #!F-adobe-times-bold-r-normal--18* Ribbon
#!EF icon below #!F-adobe-times-bold-r-normal--18* Streamline #!EF in the VPE canvas. #!N
#!I30 #!N 4. Disconnect #!F-adobe-times-bold-r-normal--18* Streamline #!EF output from #!F-adobe-times-bold-r-normal--18* Collect
#!EF input and reconnect it to #!F-adobe-times-bold-r-normal--18* Ribbon #!EF input. #!N
#!I30 #!N 5. Connect #!F-adobe-times-bold-r-normal--18* Ribbon #!EF output to #!F-adobe-times-bold-r-normal--18* Collect
#!EF input. #!N #!I30 #!N 6. Reexecute the visual program. The
streamline changes to a ribbon. #!N #!I0 #!N #!EF #!N #!N
#!N If you want the twist of the ribbon to represent
the vorticity of the wind field: #!N #!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N
#!N #!I30 #!N 1. Open the #!F-adobe-times-bold-r-normal--18* Streamline #!EF configuration dialog
box. #!N #!I30 #!N 2. Change the #!F-adobe-times-bold-r-normal--18* flag #!EF parameter
value from "(input dependent)" to "1" and click on #!F-adobe-times-bold-r-normal--18* OK
#!EF . #!F-adobe-times-bold-r-normal--18* Streamline #!EF computes the degree of twist from
the vorticity of the wind field. #!N #!I30 #!N 3. Reexecute
the visual program. The twist is greater in regions of higher
wind vorticity. #!N #!I0 #!N #!EF #!N #!N #!N To make
the color of the ribbon correspond to wind velocity: #!N #!I0
#!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N 1. Select #!F-adobe-times-bold-r-normal--18* Transformation #!EF
and then #!F-adobe-times-bold-r-normal--18* AutoColor #!EF in the palettes. #!N #!I30 #!N
2. Position the #!F-adobe-times-bold-r-normal--18* AutoColor #!EF icon between #!F-adobe-times-bold-r-normal--18* Ribbon #!EF
and #!F-adobe-times-bold-r-normal--18* Collect #!EF in the VPE canvas. #!N #!I30 #!N
3. Disconnect the #!F-adobe-times-bold-r-normal--18* Ribbon #!EF output from the #!F-adobe-times-bold-r-normal--18* Collect
#!EF input and reconnect it to the first (leftmost) input of
#!F-adobe-times-bold-r-normal--18* AutoColor #!EF . Note: Both input tabs can accept a
connection, but the semi-highlighting indicates #!F-adobe-times-medium-i-normal--18* required #!EF input (i.e., the
module cannot function without it). #!N #!I30 #!N 4. Connect the
first (leftmost) output of #!F-adobe-times-bold-r-normal--18* AutoColor #!EF to the available input
of #!F-adobe-times-bold-r-normal--18* Collect #!EF . #!N #!I30 #!N 5. Reexecute the
visual program. Note the variation of color in the ribbon. #!N
#!N See Ribbon and Streamline in IBM Visualization Data Explorer User's
Reference. #!N #!I0 #!N #!EF #!N #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next
Topic #!EF #!N #!N #!Lt3dsgly,dxall53 h 3-D Scalar Glyphs #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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