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Viewport group codes (continued)<br />
Group codes<br />
Description<br />
74 Display UCS icon at UCS origin flag:<br />
Controls whether UCS icon represents viewport UCS or current UCS<br />
(these will be different if UCSVP is 1 and viewport is not active).<br />
However, this field is currently being ignored and the icon always<br />
represents the viewport UCS<br />
110 UCS origin<br />
DXF: X value; APP: 3D point<br />
120, 130 DXF: Y and Z values of UCS origin<br />
111 UCS X-axis<br />
DXF: X value; APP: 3D vector<br />
121, 131 DXF: Y and Z values of UCS X-axis<br />
112 UCS Y-axis<br />
DXF: X value; APP: 3D vector<br />
122, 132 DXF: Y and Z values of UCS Y-axis<br />
345 ID/handle of AcDbUCSTableRecord if UCS is a named UCS. If not<br />
present, then UCS is unnamed<br />
346 ID/handle of AcDbUCSTableRecord of base UCS if UCS is orthographic<br />
(79 code is non-zero). If not present and 79 code is non-zero, then base<br />
UCS is taken to be WORLD<br />
79 Orthographic type of UCS<br />
0 = UCS is not orthographic;<br />
1 = Top; 2 = Bottom;<br />
3 = Front; 4 = Back;<br />
5 = Left; 6 = Right<br />
146 Elevation<br />
NOTE The ZOOM XP factor is calculated with the following formula:<br />
group_41 / group_45 (or pspace_height / mspace_height).<br />
112 | Chapter 6 ENTITIES Section
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