#!F-adobe-helvetica-medium-r-normal--18* #!N #!N #!Rtall589 Cache Control: Display #!N #!N #!N Some modules use the caching system to cache their own data. The Display and Image tools are such tools. When using software rendering, they cache the images they display in the X windows. This is an optimization that can be seen when using the Sequencer. When this tool starts repeating itself (in loop or palindrome mode), the images are displayed much faster. That is, Display (or Image) is pulling them out of the cache instead of rerendering the input objects each time. You can observe this effect by running the example program MovingCamera.net with software rendering. #!N #!N Most of the time this caching behavior is desirable, but in some cases it is better turned off. To do that, use the Options module to add a "cache" attribute with the integer value of 0 (zero), as follows: #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N o = Options(o, "cache", 0); #!N Display(o, camera); #!EF #!N #!N #!EC #!N #!N The Image tool's Configuration dialog box has an #!F-adobe-times-bold-r-normal--18* option #!EF menu that lets you control its caching. This can be useful when one is running a batch job to generate an animation in which none of the frames will be displayed a second time. #!N #!N Note that the -cache off command line option mentioned above has no effect on the internal caching that modules themselves perform. Note: You can use the Data Explorer command line option -optimize memory, which will automatically set the DXDELAYEDCOLORS and DXPIXELTYPE environment variable to the options that consume the least memory. The alternative is -optimize precision. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall589,dxall590 h System Tuning #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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