Like a Vector3, an Euler (pronounced like “oiler”) is a type of variable that has an x, y, and a z property, but in this case they specifically track how much to rotate an object around the x, y, and z axes so that the object is rotated the way you want it to.
This is the easiest way to keep track of rotations, but every once in a while it can be unreliable, so we sometimes also use Vector3, Matrix4, and Quaternion types to represent rotations.
More Info
- Remix this demo to experiment with Eulers yourself.
- See the Euler entry in the dot big bang Developer API reference.