【 Weak current College 】 AutoCAD troubleshooting and tips (7)---Power By 【 China power house network 】

25. a calculation method of arc length.
1. as long as direct draw be measured arc, lengthen command (elongated, command alias: len) directly select the arc to know the ARC ARC length and the corresponding Central angle.
2. There is a list, alias LI, can get arc's all parameters, including the circle, the RADIUS, starting from the angle of arc length, and end point.
3. use pedit (simplified command for PE), select the arc, and at the prompt, enter Y to be converted into multiple lines.
4. AREA of the O option, select the arc segment, you can display the length and size.
The length is no longer calculated, that is the length of the arc segment.

26.1AutoCAD stereo text in alternative practices
Often friends ask what to do in the AutoCAD2002 3D text, because the program itself less 2002 "shortcut tool", you cannot use the "text decomposition" feature. 2004 version of the program text there will be less decomposed, also to line do 3D text inconvenience. The alternative approach to consolidation in this, we may wish to try:
1. text to enter "T" font.
2, display as a three-dimensional wireframe.
3, view-preset, and the XY-plane angle adjustment to 89 degrees (the original is 90 degrees).
4. output files for the WMF format.
The above is the preparation phase. Then you can create new graphic files can also be used in the original file on the above text to delete later.
5. Insert a Windows Metafile (WMFIN).
6, place the insertion of graph decomposition command twice.
7. remove the extra lines in the font style, text into hollow closed line.
8, converted to surface fields stretch (EXTRUDE) into 3D entities.

26.2 installation "shortcut tool" is a way (CAD2000)
1. Select font-Arial
2, use the decomposition type (shortcut tool) font decomposition
3, use the burst feature font then exploded, and then remove the fill line!
4, create the font, for surface field
5, use the entity command bar stretch feature will face domain extension.
6, conversion views

27. What is the file name suffix
Speaking of Windows work interface is simply a file name you want, such as: an editorial by 2000 work plan. Filename to use Chinese direct expression and length up to 256 characters, and let people really look at a glance. However, in a Windows environment, the installation of the software has a large number of similar CALENDAR.EXE exists, the file name, and so on GAMES.GRP is why? originally these file names are file names under DOS environment rules.
The file name of the DOS environment
In DOS, the file name takes the 8 + 3 structure, i.e. a maximum of 8-bit file names, separated by a decimal point and then follow up to 3-digit suffix names, such as: READ.ME, SETUP.EXE, normally a file name that does not allow the use of Chinese characters, only letters, numbers and symbols. If READ.ME in Chinese understand is the "read me" that is, prompts the user to use the software before you look at the contents of this file in order to get more tips. But more importantly, the DOS shall comply with the suffix names to distinguish between different kinds of files.
4Q4I * \9c! s/G7j in DOS most vulnerable in the first place is the executable file, the suffix name has two types: * .exe, .com * (where * indicates that the file name is arbitrary), which is determined by the Assembly language or other high-level language compile out of the program is compiled directly after running in DOS. Sometimes due to software functionality, memory is small, you cannot call into memory all at once may have the same file name, such as the ovl file ws.exe, ws.ovl. There is also a file can be directly run, .bat, i.e. batch *, which has many command or executable file that is used primarily to improve work efficiency, one of the most useful is the Autoexec.bat, this file will be in power on automatically (automatic execution in the English language is Automaticallyexecute). And another can be loaded but not directly run the file that is system extension .sys files * (sys-system system), which mainly provides some non-standard devices such as mice, expanded memory and other drivers, such as mouse.sys, himem.sys. In order to unify the management also specifically provides for a text file config.sys to once in the automatically import the required device drivers, these files once they are deleted or changed names or virus attacks you will lead directly to the system is not functioning properly.
DOS word-processing file was originally produced without the suffix, but people often use * .txt (text txt or text). Are all of the platforms and all application support. Easy to manage, it can also use your own name as a suffix to indicate their own built in text files, as I entered and many articles for * .mcj, to make it easier for users to accidentally delete the original file to restore the original files as soon as possible, many word processing system provides an automatic backup features, such as my second edit JIHUA.MCJ (JIHUA: plan of Hanyu Pinyin), the system will first copy the file as a copy of the original JIHUA.BAK. Use a special format function in your word processing software, such as Mr. Qiu bojun early launch of the WPS, will require its suffix identifies the .wps, is a text file that is generated by using WPS. When you use word processing software to edit the advanced language program, the suffix is typically a corresponding language of the first three letters (for example: * .BAS i.e. BASIC language source, * .PASAs PASCAL language program, * .FOR as Fortran language program, * .C is the C language, * the .ASM) Assembly language program.
Along with the executable file, often accompanied by the following types of files: * .HLP Help file (help), * .CFG i.e. configuration files (config), * .DAT files the data (data), * .LOG is the log file (log), * .TMP for temporary files (temporal).
The file name of the Windows environment
The vast majority of DOS filename suffixes in Windows continue to be valid, but Windows itself leads to many new suffix names, such as: * .drv for device driver (Driver), * .fon and * .fot are font files, grouping files to .grp * (Group), * .ini file for initialization information (Initiation), * .pif to DOS environment executable in Windows under implemented the required file format, * the card file .crd (Card), * .rec i.e. recorder macro file (Record), * the .wri (Write) text file, it is a word processing file, generated by the write.exe * .doc and .rtf is text * (Document), which is the Word of a file, * .cal file for calendar, * .clp is a file format from the Clipboard, * .htm and .html files on the home page * and * .par for a swap file, * .pwl file for password (Password), and so on.
Image file name suffix into multimedia world, people will see all sorts of wonderful pictures, will find many kinds of suffix name. Indeed, due to various companies in the development of graphics software is a self-made standard, leading to today in graphics too many format, the following are some common formats:
The first is a bitmap file format, it is a set of points (pixel) images that are generated by the image program, or when creating the scanned image. Mainly Windows bitmap (.BMP): by Microsoft Corporation, which is Windows and WindowsNT platforms and many applications support. Support for 32-bit color, used for Windows interface to create the icon resource file format, the cursor (.CUR, .DLL, .EXE): resource file format, used to create Windows interface of the cursor. OS/2 bitmap (.BMP): Microsoft and IBM development of bitmap file format. It provides a wide variety of operating systems and application support. Support for compression, the largest image pixels to 64000 × 64000. Brush (.PCX): launched by Zsoft Corporation, it has also carried the image data compression, you can generate by PCX. Brush for Windows. Supports 24-bit color image pixels, maximum is 64000 × 64000. Support compression. Graphics Interchange Format (.GIF): (GraphicsInterchageFormat): created by CompuServe, it is able to support any size by compressing a picture, to save storage space, you can add multiple picture exists in a file. Supports 256 colors, maximum image pixel is 64000 × 64000.
4U1w?! Q9a/U) P) n/u x + _ # KodakPhotoCD (.PCD): EastmanKodak developed by bitmap file formats are supported on all platforms, PCD supports 24-bit color, the largest image pixel is 2048 × 3072, used to save pictures on CD-ROM.
AdobePhotoshop (.PSD): AdobePhotoshop bitmap file format, be Macintosh and MSWindows platform supports the largest image pixel is 30000 × 30000, support compression, widely used in commercial art.
Macintosh drawing (.MAC): Apple company developed by bitmap file format. Be supported by the Macintosh platform, only supports monochrome image, maximum image is 720 × 576 pixels. Support compression, mainly used in Macintosh graphics application saved in black and white graphics and clip art pictures.
Animation file suffix name
Animation file format used to save contains animation frame graphic information. Main: AutodeskFLIC (.FLC): .FLI, AutodeskAnimator and AnimatorPro animation file format. Supports 256 colors, the largest image pixel is 64000 × 64000, support compression. Widely used in animation graphic animation sequences, computer-aided design and computer game application. Not suitable for making real-world image animation.
MacPICTS (.PCS, .PIC): Macromedia development of animation file format for Macintosh applications. Supports 256 colors, supports compressed, to save the animation data, is the predecessor of QuickTime.
Microsoft Resource Interchange file format, TIFF (.AVD): Microsoft Corporation animation file format, Windows, WindowsNT platforms and OS/2 support multimedia applications, supports 256 colors and compression, used in multimedia applications save audio, video, and graphic information.
MPEG (.MPEG): International Organization for Standardization (ISO) for moving picture experts group on development of animation file format. Are all platform and XingTechnologiesMPEG player and other applications that support, supportCompressed image pixels, maximum is 4095 x 4094 x 30 frames/sec. Used to encode audio, video, text and graphics data.
QuickTime (.QTM): Apple computer company in the development of the animation file format. Been AppleMacintosh and MicrosoftWindows platforms supported, support 25-bit color image pixels, maximum is 64000 × 64000, support compression, which is used to save audio and video information.
Sound file suffix name
Sound file format is used to store digital audio information. They are:
AIFF (.AIF): this is the Apple computer company in the development of a sound file format, the Macintosh platform and application support. Support compression.
Amiga sound (.SVX): Commodore developed sound file formats, is Amiga platform and application support, do not support compression.
MAC sound (.SND): Apple computer company in the development of a sound file format, be Macintosh platforms and multiple Macintosh applications support, support for some compression.
MIDI (.MID): International Association for the development of MIDI sound file formats, the Windows platform and is supported by many applications for digital sound for music creation.
Sound Blaster (.VOC): CreativeLabs company development of the sound file formats, Windows and DOS platforms supported, support for compression.
WAVE (.WAV): Microsoft for Windows platforms save audio information resource format.
Compressed file suffix name
In order to increase storage efficiency, many companies have launched the compressed data and the appropriate software, the use of such files by pressing package reconciliation package software, there are major suffix: arj, * .rar, * .lzh, * .jar. There are also some specialized compressed files, such as: * .ex_, * .dl_, * .d3_, * .cab. )`
Database class file suffix name
In Dbase, FoxBase, Foxpro series software environment is available in the following class suffix:
Database file (databasefile) .prg command file (i.e. program Program)
.Fxp compiled program .scx and .sct files screen
.Fpt memo field .frx .frt file and report files
.Cbx and .pjt .mnx .mnt label file and menu files
.Pjx and application engineering file .pjt .app files
Cdx and .idx index file .qpr and .qpxSQL query files
Profile .ap generated application
Compilation error file .men memory applications
Key macro file .win files window
Library files .tmp temporary files
.Tbk temporary database file
PostScript
Users should note that different operating systems, the suffix name conventions vary, such as under UNIX, * .p representative Pascal language program, * .z represents a compressed file, * .tar representative archive. In addition, for very special device, the driver will have a special suffix, such as 3DS display card drivers is * .exp. There are some companies for their products also provides file name suffix, such as the founder company image layout file provided with * .grh (Graph).
File name suffix represents a certain type of file, typically by a specific software generation and processing. Only the name of the suffix of knowledge has a certain understanding of the computer know that characterizes in the process. Here with us to see some of the common suffix type, there are many types, it is not possible to completely finish. It is said that the chef apprentice, spiritual practice in personal, after everyone in the computer world in their own turn to look.