---
title: kInitialRotationAtom
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/kinitialrotationatom
---

# kInitialRotationAtom

An atom that specifies an initial angle of rotation for a path tween atom.

## Overview

Overview Specifies an initial angle of rotation for a path tween atom of type kTweenTypePathToMatrixRotation, kTweenTypePathToMatrixTranslation, or kTweenTypePathToMatrixTranslationAndRotation. Its parent atom is a kTweenEntry atom. A kTweenEntry atom can contain only one kInitialRotationAtom atom. The ID of this atom is always 1. The index of this atom is always 1. This atom is a leaf atom. Its data type is Fixed. This atom is optional. If it is not included, no initial rotation of the tween atom is performed.

## See Also

### Path Tween Atoms

- [kTweenFlags](quicktime-file-format/ktweenflags.md)