In TurboGrid State or Session files, how can the position of Control Points be determined, e.g. for use in batch?
The position of Control Points in TurboGrid State or Session files depends on the method of creating Control Points:
1) Relative Definition: Existing (Master) Control Points, all (Master) Control Points in State files and (Master) Control Points,
that have been moved from its original position, are defined by 2 coordinates, for example:
MASTER POINT:Master 1
Requested Position = 1.02818e-006, 1.572e-008
Frame of Reference = Relative
These 2 coordinates are the dimensionless variables M-Prime (meridional coordinate normalized by radius) and the wrap angle Theta Normalized (normalized
with the pitch angle). These coordinates are relative to the original position of that Control Point, when the topology was first generated.
2) Absolute Definition: When creating user-defined (Master) Control Points interactively in TurboGrid by clicking on the topology in the TurboGrid viewer,
and a Session file is stored; for example:
MASTER POINT:Point 1
Move Action = Find Vertex
Requested Position = 79.1257, 1.40927, 19.3519
The (Master) Point position is the define in absolute x, y, z coordinates of the nearest topology block edge, on which the (Master) Control Point is introduced.
In generel, it is therefore recommended to NOT use the recorded position of user-generated Control Points in session file when creating templates for batch operation. Instead the following procedure is recommended:
1) Read in geometry, create topology, insert (Master) Control Points at appropriate positions and copy all user-generated (Master) Control Points to all layers (e.g.
from hub to shroud and vice versa). Set the Mesh Data.
2) Write out a State file, which only contains the Topology and the Mesh Data plus the Layers.
3) Start a new TurboGrid session, create a new Session file and start recording: reading of geometry, appending the previously created State file and generating
and exporting the mesh.