"Axis"  physical types

The Axis Set is dedicated to receive axes data inside the field model. It includes explicit axis objects. Theses objects allow to define rectangular, cylindrical or spherical axes based on coordinates or nodal selection. Basically an axis is defined by three points that must be non-collinear. 

The physical type list is:

• AXIS_RECTANGULAR_3D_NODE defines a rectangular axis by defining the three characteristics based on node selection:
  • ORIGIN_NODE  pointer on the origin node (CATAnalysisExplicitNode reference object).
  • LOCAL_XZ_NODE pointer on a node that defines a vector which, with the Z-Axis, defines the XZ plane.
  • LOCAL_Z_NODE pointer on a node that, defines the direction of the Z-Axis.

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• AXIS_RECTANGULAR_3D_COORDINATE defines a rectangular axis by defining the three characteristics based on coordinates selection:
  • ORIGIN_COORDINATE
  • LOCAL_XZ_COORDINATE
  • LOCAL_Z_COORDINATE
  • LOCAL_AXIS to define an axis with respect to another one.

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• AXIS_CYLINDRICAL_3D_NODE defines a cylindrical axis by defining the three characteristics based on node selection
  • ORIGIN_NODE
  • LOCAL_XZ_NODE
  • LOCAL_Z_NODE

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• AXIS_CYLINDRICAL_3D_COORDINATE defines a cylindrical axis by defining the three characteristics based on coordinates selection:
  • ORIGIN_COORDINATE
  • LOCAL_XZ_COORDINATE
  • LOCAL_Z_COORDINATE
  • LOCAL_AXIS to define an axis with respect to another one.

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• AXIS_SPHERICAL_3D_NODE defines a spherical axis by defining the three characteristics based on node selection:
  • ORIGIN_NODE
  • LOCAL_XZ_NODE
  • LOCAL_Z_NODE to define an axis with respect to another one.

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• AXIS_SPHERICAL_3D_COORDINATE defines a spherical axis by defining the three characteristics based on coordinates selection:
  • ORIGIN_COORDINATE
  • LOCAL_XZ_COORDINATE
  • LOCAL_Z_COORDINATE
  • LOCAL_AXIS to define an axis with respect to another one.

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For Cylindrical and spherical axes, the additional characteristic "REVERSE" defines the way the radial direction is defined. Without this characteristic, radial direction goes from the center to the application point, with the characteristic defined, it goes from the application point to the center of the axis. The following figure shows the way to consider the other characteristics.

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