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TDUCREATE DXF system variable, 25<br />
TDUPDATE DXF system variable, 25<br />
TDUSRTIMER DXF system variable, 25<br />
TDUUPDATE DXF system variable, 26<br />
text group codes, 103<br />
TEXTSIZE DXF system variable, 26<br />
TEXTSTYLE DXF system variable, 26<br />
THICKNESS DXF system variable, 26<br />
THUMBNAIL section<br />
about, 147<br />
THUMBNAILIMAGE<br />
group codes, 144<br />
THUMBNAILIMAGE section<br />
about, 143<br />
TILEMODE DXF system variable, 26<br />
time/date variables, handling of, 28<br />
tolerance group codes, 105<br />
TRACE DXF system variable, 26<br />
trace group codes, 106<br />
TREEDEPTH DXF system variable, 26<br />
U<br />
UCS group codes, 47<br />
UCSBASE DXF system variable, 26<br />
UCSNAME DXF system variable, 26<br />
UCSORG DXF system variable, 26<br />
UCSORGBACK DXF system variable, 26<br />
UCSORGBOTTOM DXF system variable, 26<br />
UCSORGFRONT DXF system variable, 26<br />
UCSORGLEFT DXF system variable, 26<br />
UCSORGRIGHT DXF system variable, 26<br />
UCSORGTOP DXF system variable, 26<br />
UCSORTHOREF DXF system variable, 26<br />
UCSORTHOVIEW DXF system variable, 27<br />
UCSXDIR DXF system variable, 27<br />
UCSYDIR DXF system variable, 27<br />
UNITMODE DXF system variable, 27<br />
user coordinate system (UCS), 174<br />
USERI1-5 DXF system variable, 27<br />
USERR1-5 DXF system variable, 27<br />
USRTIMER DXF system variable, 27<br />
V<br />
VBA_PROJECT group codes, 139<br />
vectors, in slide files, 160<br />
VERSIONGUID DXF system variable, 27<br />
vertex group codes, 107<br />
VIEW group codes, 49<br />
VIEWCTR revised VPORT header variable, 28<br />
VIEWDIR revised VPORT header variable, 28<br />
viewport entities<br />
coordinate systems associated with, 174<br />
viewport group codes, 109<br />
VIEWSIZE revised VPORT header variable, 28<br />
VISRETAIN DXF system variable, 27<br />
Visual Basic programs (examples)<br />
for reading a DXF file, 154<br />
for writing a DXF file, 157<br />
VPORT group codes, 51<br />
VPORT header variables, revised, 27<br />
VSLIDE/MSLIDE commands, 159<br />
W<br />
world coordinate system (WCS), 173<br />
WORLDVIEW DXF system variable, 27<br />
writing a DXF file (example), 156<br />
X<br />
X and Y axes orientation calculations, 173, 174,<br />
175<br />
X axis, arbitrary axis algorithm and, 175<br />
xdata<br />
and dimension entities, 76<br />
sample entity containing (DXF format), 170<br />
xdata group codes, 171<br />
binary DXF group codes, 158<br />
XEDIT DXF system variable, 27<br />
xline group codes, 113<br />
XRECORD group codes, 140<br />
XY coordinates, working with, 174<br />
Y<br />
Y axis, arbitrary axis algorithm and, 175<br />
Z<br />
Z axis<br />
arbitrary axis algorithm and, 175<br />
OCS properties for, 173<br />
182 | Index
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