autocad 2002 bible bonus_appe

A value of 0 the default swaps foreground and

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Unformatted text preview: ou set WMFBKGND to 0, which makes the background color transparent. A value of 0, the default, swaps foreground and background colors if necessary to make the foreground color, that is, the objects, darker than the background color. A value of 1 does the opposite, so that the foreground color is lighter than the background color. Discontinued system variables Table E-5 shows system variables that have been discontinued along with available alternatives. Table E-5 Discontinued System Variable in AutoCAD 2002 System Variable Alternative DIMASO Obsolete; replaced by DIMASSOC. Appendix E ✦ Command and System Variable Changes Changed system variables Table E-6 lists some changed system variables. Table E-6 Changed System Variables in AutoCAD 2002 System Variable Change DIMASSOC Supports AutoCAD 2002’s new associative dimensions. System variables often used on the command line If you write AutoLISP routines, you need to work with all system variables. However, for most drawing tasks, you only need to know the system variables that you usually do not set in a dialog box. These are the system variables that you might want to type on the command line, and thus you should know them by name. Tables E-7 through E-14 list system variables by function so you can find them even if you don’t know their names. Table E-7 System Variables for 3D Drawing System Variable Description COMPASS Turns the compass, a 3D orbit aid, on and off in the current floating viewport. DISPSILH Turns on and off the display of silhouette curves of 3D objects in wireframe display. FACETRES Sets the smoothness of 3D shaded and rendered objects and objects with hidden lines removed. HALOGAP Specifies the percentage of an inch to shorten a haloed line — a line in a 3D model that would otherwise be hidden using the HIDE command. Haloed lines are shortened to set them off from unhidden lines and display only when you use the HIDE command or the Hide option of SHADEMODE. Does not apply to the lines that create the back (hidden) s...
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