Drawing eXchange Format

DXF , Sigle of D rawing e' X' changes F ormat, is a format created by the company Autodesk being used to exchange files CAD or CAD between systems CAD not using the same format of native file. It was conceived in the beginning to represent the models 3D created with AutoCAD ®.

Files DXF can be of ASCII format (DXF) or binary (DXB).

DXF is a format of file used for the transfer of information of the vector type. It contains information for the visualization of the graphic data and is supported by almost all the graphic softwares. There are many methods to record the data of the attributes of the graphic objects by format DXF and also to bind objects DXF to external attributes. Almost all the software sig, CAD and graphs can successfully import this format because of the standards.

General structure of a file DXF

HEADER section - general Information on the drawing
CLASSES section
TABLES section

Application ID (APPID) table

Block Recod (BLOCK_RECORD) table

Dimension Style (DIMSTYPE) table

Layer (TO BUSH-HAMMER) table

Linetype (LTYPE) table

Text style (STYLE) table

User Coordinate System (UCS) counts

View (VIEW) OFF table

Viewport configuration (VPORT) table

BLOCKS section
ENTITIES section
OBJECTS section
section

END FILE'

ASCII example DXF

The following file draws a circle of center (0.0, 0.0, 0.0) and of ray 1.0, for more information consult specification DXF on AutoDesk

0
SECTION
2
ENTITIES
0
CIRCLE
10
0.0
20
0.0
30
0.0
40
1.0
0
ENDSEC
0
EOF

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