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 # RARotation

 Last update: 16.07.2025 

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### *class* RARotation

Rocky PrePost Scripting wrapper representing a Rotation motion.

Retrieve this specific wrapper after setting the correct motion type on a [`RAMotion`](RAMotion.md#generated.RAMotion). For example:

```python
motions = motion_frame.GetMotions()
motion_1 = motions.New()
motion_1.SetType('Rotation')
rotation = motion_1.GetTypeObject()

```

**Methods:**

NameDescription[`GetAngularAcceleration`](#generated.RARotation.GetAngularAcceleration)(\[unit\])Get the value of "Angular Acceleration".[`GetInitialAngularVelocity`](#generated.RARotation.GetInitialAngularVelocity)(\[unit\])Get the value of "Initial Angular Velocity".[`SetAngularAcceleration`](#generated.RARotation.SetAngularAcceleration)(values\[, unit\])Set the values of "Angular Acceleration".[`SetInitialAngularVelocity`](#generated.RARotation.SetInitialAngularVelocity)(values\[, unit\])Set the values of "Initial Angular Velocity".<a id="generated.RARotation.GetAngularAcceleration"></a>

#### GetAngularAcceleration(unit: str | None = None)

Get the value of “Angular Acceleration”.

- **Parameters:****unit** – The unit for the returned values. If no unit is provided, the returned values will be in “rad/s2”.

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#### GetInitialAngularVelocity(unit: str | None = None)

Get the value of “Initial Angular Velocity”.

- **Parameters:****unit** – The unit for the returned values. If no unit is provided, the returned values will be in “rad/s”.

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#### SetAngularAcceleration(values: Sequence\[str | float\], unit: str | None = None)

Set the values of “Angular Acceleration”.

- **Parameters:**
    - **values** – The values to set. The values can be heterogeneous, the element of values can be an expression with input variables or a float. Must have exactly 3 elements.
    - **unit** – The unit for values. If no unit is provided, values is assumed to be in “rad/s2”.
- **Raises:****RockyApiError** – If values doesn’t have exactly 3 elements.

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#### SetInitialAngularVelocity(values: Sequence\[str | float\], unit: str | None = None)

Set the values of “Initial Angular Velocity”.

- **Parameters:**
    - **values** – The values to set. The values can be heterogeneous, the element of values can be an expression with input variables or a float. Must have exactly 3 elements.
    - **unit** – The unit for values. If no unit is provided, values is assumed to be in “rad/s”.
- **Raises:****RockyApiError** – If values doesn’t have exactly 3 elements.