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DIMTIH DXF system variable, 20<br />
DIMTIX DXF system variable, 20<br />
DIMTM DXF system variable, 20<br />
DIMTMOVE DXF system variable, 20<br />
DIMTOFL DXF system variable, 20<br />
DIMTOH DXF system variable, 20<br />
DIMTOL DXF system variable, 20<br />
DIMTOLJ DXF system variable, 20<br />
DIMTP DXF system variable, 21<br />
DIMTSZ DXF system variable, 21<br />
DIMTVP DXF system variable, 21<br />
DIMTXSTY DXF system variable, 21<br />
DIMTXT DXF system variable, 21<br />
DIMTZIN DXF system variable, 21<br />
DIMUPT DXF system variable, 21<br />
DIMZIN DXF system variable, 21<br />
DISPSILH DXF system variable, 21<br />
drawing interchange file formats<br />
ASCII DXF, 145, 146<br />
binary DXF, 145, 158<br />
Slide (SLD), 159<br />
Slide Library (SLB), 163<br />
DWGCODEPAGE DXF system variable, 21<br />
DXF<br />
conventions<br />
group code ranges, 7<br />
group codes in numerical order, 9<br />
file parsers, subclass markers and, 168<br />
files. See ASCII DXF files; binary DXF files<br />
format<br />
about, 5<br />
interface programs, writing (example), 154<br />
record names, default class values, 33<br />
system variables, 16<br />
DXFIN considerations for writing DXF files, 157<br />
E<br />
ECS. See object coordinate system<br />
ELEVATION DXF system variable, 21<br />
elevation value for entity positioning, 173<br />
ellipse edge data for hatch entities, 82<br />
ellipse group codes, 76<br />
elliptical arc definition, 77<br />
endblk group codes, 58<br />
ENDCAPS DXF system variable, 21<br />
entities<br />
block, 56<br />
coordinate systems associated with, 173<br />
endblk, 56<br />
entity group codes vs. object codes, 6<br />
group codes listed in numerical order, 9<br />
ENTITIES section<br />
about, 59, 147<br />
and writing a DXF file, 156<br />
extension dictionary, 170<br />
EXTMAX DXF system variable, 21<br />
EXTMIN DXF system variable, 21<br />
EXTNAMES DXF system variable, 22<br />
extrusion direction, OCS properties for, 173<br />
F<br />
FASTZ revised VPORT header variable, 28<br />
filing a stream of group data, subclass markers<br />
and, 168<br />
FILLETRAD DXF system variable, 22<br />
FILLMODE DXF system variable, 22<br />
FINGERPRINTGUID DXF system variable, 22<br />
G<br />
getvar AutoLISP function, 148<br />
graphical object group codes. See names of specific<br />
objects<br />
GRIDMODE revised VPORT header variable, 28<br />
GRIDUNIT revised VPORT header variable, 28<br />
group codes<br />
about, 146<br />
arbitrary handle range, 166<br />
ASCII DXF files and, 147<br />
binary DXF files and, 158<br />
for entities (graphical objects), 60<br />
examples of, 148<br />
formatting conventions for, 6<br />
in numerical order, 9<br />
objects/entities and, 6<br />
ranges of, 7<br />
reference handle ranges, 166<br />
for xdata, 171<br />
group data, subclass markers and, 168<br />
GROUP group codes, 124<br />
H<br />
handent functions (AutoLISP), 168<br />
handles<br />
about, 166<br />
arbitrary, 166<br />
of dictionary objects, 170<br />
reference, 166<br />
HANDSEED DXF system variable, 22<br />
hard references vs. soft references, 167<br />
hard-owner handles, 166<br />
hard-pointer handles, 166<br />
hatch group codes, 78<br />
hatch pattern data, 83<br />
HEADER section<br />
about, 15, 146<br />
example of, 148<br />
group codes for revised VPORT variables, 27<br />
group codes for saved DXF system<br />
variables, 16<br />
Index | 179
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