Global Coordinate Reference Surface

Global coordinates are defined by a rotation and translation from the local coordinates on each surface. The rotation matrix and the offset vector can be computed for any surface using any other surface as a global reference. The default reference surface is 1, but any other surface may be chosen. There are two exceptions. One exception occurs when the object is at infinity, and then 0 may not be the reference surface. The other exception is that a Coordinate Break surface may not be set as the Global Coordinate Reference Surface. The surface selected determines the global coordinate system origin location and orientation. The reference surface is also used to define the point of overlap for multiple zoom positions on the 3D layout plot.

Next:

• Telecentric Object Space