COG_X, COG_Y, COG_Z
Shows the coordinates of the center of gravity of assemblies, parts, or welds:
For parts, assemblies, and cast units the attributes COG_X, COG_Y, and COG_Z return values in global coordinate systemcoordinate system that reflects the entire space of a model
A green cube represents the global coordinate system and lies at the global point of origin in the 3D view.
For welds the attributes COG_X, COG_Y, and COG_Z return values in local coordinate systemcoordinate system that reflects the current work plane or drawing view plane
The local coordinate system is represented in a model by a symbol with three axes (x, y, and z). This symbol indicates the direction of the model. It is located in the lower right corner of the model view.
In a drawing, the local coordinate system symbol has two axes.
(current work planeplane that the user has chosen in a model and that is currently active for working on in a model view
Newly created, copied, or moved model objects comply with the work plane. For example, shifting the work plane to follow a sloped plane makes it easier to model sloped structures.
gridmodeling aid that represents a three-dimensional complex of horizontal and vertical planes
In Tekla Structures, grids are used as an aid in locating objects in a model. The grid is shown on the view plane by dash-and-dot lines. It is also possible to show grids and grid line labels in drawings, and to modify grid properties in the drawings.
It is possible to have more than one grid in a model. For example, a large-scale grid for the entire structure, and smaller grids for some detailed sections.
These attributes cannot be used in headers or footers.