#!F-adobe-helvetica-medium-r-normal--18* #!N #!CSeaGreen #!N #!Rall258 Groups #!N #!EC #!N #!N Fields can be combined into #!F-adobe-times-medium-i-normal--18* Groups #!EF . A Group is a collection of #!F-adobe-times-medium-i-normal--18* members #!EF that themselves may be Fields or other Groups. A member can be referred to either by name or by index. An example of a Group is given in #!Lgroup35,dxall259 f Figure 35 #!EL . #!Cbrown #!N #!F-adobe-times-medium-r-normal--18* #!Rgroup35 #!N #!N Graphics omitted from Online Documentation. Please see the manual. #!N Figure 35. Example of a Group #!EF #!N #!EC #!N #!N This example shows a Group describing a visualization scene composed of two parts. The member named "pressure" is a Field of volumetric data to be volume rendered, representing pressure in an airflow around an airplane. The member named "airplane" is a geometric model describing the surface of the airplane. It, in turn, can be a Group, where each member is one of the constituent parts of the airplane, such as "wing," "fuselage," and so on. The top-level Group could then be passed into the renderer to produce an image of the airplane combined with a volume rendering of the pressure Field. #!N #!N Named Group members can be retrieved by name or by index number; the #!F-adobe-times-medium-i-normal--18* n #!EF members of a Group are numbered from 0 to #!F-adobe-times-medium-i-normal--18* n-1 #!EF . Group members can also be stored by index number without a name, in which case they can be retrieved only by index number. The members of a Group are always numbered consecutively starting at 0, and gaps in the numbering are not allowed. #!N #!N In addition to generic Groups used to collect related information, there are three subclasses of Group used to combine related Objects with additional semantics: #!F-adobe-times-medium-i-normal--18* Multigrid #!EF Groups, #!F-adobe-times-medium-i-normal--18* Composite Field #!EF Groups, and #!F-adobe-times-medium-i-normal--18* Series #!EF Groups. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall259,dxall260 h Multigrid Groups #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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