# Orbital Create

- Type
- Scope
- Volume
- Position
- View

Set here the position and orientation of an orbital.

### Translation

The origin of an orbital object, defined as its center, can be set using the X, Y, Z entries. A simpler way to set directly the orbital position is to click on the screen, at the wished position, after defining all the other orbital properties: a new orbital object is created at that position.

### Rotation

The orientation of an orbital object, defined by the Euler angles theta, phi, psi, can be set using the E1, E2, E3 entries.

Euler angles in GAMGI are defined as follows: first, the (x, y, z) referential is rotated theta degrees (between 0 and 180) around the y axis, then the referential is rotated phi degrees (between 0 and 360) around the initial z axis, and finally it is rotated psi degrees (between 0 and 360) around the new z axis, always in the direct, counter-clockwise, direction. If the first Euler angle (theta) is zero, the old and new z axis coincide, thus (0, 0, 10) and (0, 5, 5) represent the same rotation.

By default, the orbital frame first vector is aligned with the x axis (to the right), the second vector is on the xy (screen) plane and the third vector has a positive z coordinate (pointing to the user), corresponding to Euler angles (0, 0, 0).
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