#### 2.1.5.2. Rosette Types

- Parallel: Analogous to a Cartesian coordinate system. The Reference Direction is given by the Rosette's X direction.

- Radial: the Reference Direction for a radial Rosette is perpendicular to the Z direction. The Z direction lies orthogonal to Direction 1 and Direction 2 in the Rosette properties. The Reference Direction for an individual element is defined by the vector of Rosette origin to element center which is projected onto the element. If the direction vector cannot be projected the alternate Direction 1 is chosen.

  Figure : Oriented Selection Set with a Radial Rosette.

- Cylindrical: Based on a cylindrical coordinate system. The Reference Direction runs circumferentially around the Rosette's Z direction according to the right hand rule. The Z direction is defined by the X and Y direction vectors. Flip the Z direction to reverse the Reference Direction.

  Figure : Oriented Selection Set with a Cylindrical Rosette

- Spherical: Based on a spherical coordinate system. The Reference Direction runs circumferentially around the Z axis of the Rosette.

  Figure : Oriented Selection Set with a Spherical Rosette

- Edge Wise: Requires the selection of an Edge Set in addition to the usual Rosette definition. The Reference Direction is given by a projection of the Rosette's X direction and the path of the Edge Set. The X direction of the Rosette coordinate system is projected on to the point on the Edge that is closest to the origin of the Rosette. This determines Reference Direction along the Edge Set. The Reference Direction is reversed by switching the coordinates of the Rosette's X direction. An element within an Oriented Selection Set gets its Reference Direction from the direction of the point on the edge that is closest to the element centroid.

  Figure : Edge Wise Rosette

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