I.4.1.5 “FieldCS” Result

“FieldCS” Results is a special kind of Result corresponding to the concept of coordinate system defined element by element, node by node, element corner by element corner, etc. Each key of the Result is associated to a Value of nine components corresponding to the components of three local vectors associated to the key.

When defining the “FieldCS” Result one must be careful:

• The TensorOrder associated to the Result object is -10!
• Only “real” Format makes sense for this kind of Result.
• As explained above the FieldCS Result has 9 components corresponding to the components of the three base vectors associated to each key.
• The coordinate system in the values must be zero or positive. No systematic check is done when thev Result is created. (Compliance with this rule depends entirely on the disciplin of FeResPost user.)
• In each value, the three vectors corresponding to the nine components must be mutually orthogonal and have unit lengths. Again, FeResPost user is responsible for the compliance with this rule. (No check is done by FeResPost.)
• FieldCS Results can be used in a limited number of operations only. Actually, They are meant to be used as coordinate system in modifyRefCoordSys method (section I.4.6.7). Note that the components of a FieldCS Result can also be modified by modifyRefCoordSys method but the new CS ID should be >=0.
• Actually, as the function mainly meant to be used in method, better efficiency is generally obtained when values components are expressed wrt CS 0.

“assembleFieldCSFrom3Vectors” method is specific to the construction of “FieldCS” type of Results. This method has three vectorial Result arguments. The key-value pairs of the three Result arguments must match.