Euler rotation sequence options:
| Member | Value | Description | 
|---|---|---|
| e121 | 0 | 121 rotation. | 
| e123 | 1 | 123 rotation. | 
| e131 | 2 | 131 rotation. | 
| e132 | 3 | 132 rotation. | 
| e212 | 4 | 212 rotation. | 
| e213 | 5 | 213 rotation. | 
| e231 | 6 | 231 rotation. | 
| e232 | 7 | 232 rotation. | 
| e312 | 8 | 312 rotation. | 
| e313 | 9 | 313 rotation. | 
| e321 | 10 | 321 rotation. | 
| e323 | 11 | 323 rotation. | 





