#!F-adobe-helvetica-medium-r-normal--18* #!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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