You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
ordering. Programs that generate polyface meshes in DXF should generate all<br />
the vertices then all the faces. However, programs that read polyface meshes<br />
from DXF should be tolerant of odd vertex and face ordering.<br />
RAY<br />
The following group codes apply to ray entities. In addition to the group<br />
codes described here, see “Common Group Codes for Entities” on page 60.<br />
For information about abbreviations and formatting used in this table, see<br />
“Formatting Conventions in This Reference” on page 6.<br />
Ray group codes<br />
Group codes<br />
Description<br />
100 Subclass marker (AcDbRay)<br />
10 Start point (in WCS)<br />
DXF: X value; APP: 3D point<br />
20, 30 DXF: Y and Z values of start point (in WCS)<br />
11 Unit direction vector (in WCS)<br />
DXF: X value; APP: 3D vector<br />
21, 31 DXF: Y and Z values of unit direction vector (in WCS)<br />
REGION<br />
The following group codes apply to region entities. In addition to the group<br />
codes described here, see “Common Group Codes for Entities” on page 60.<br />
For information about abbreviations and formatting used in this table, see<br />
“Formatting Conventions in This Reference” on page 6.<br />
Region group codes<br />
Group codes<br />
Description<br />
100 Subclass marker (AcDbModelerGeometry)<br />
70 Modeler format version number (currently = 1)<br />
RAY | 99
Change language