How move and rotate at the same time?

Unity Engine
1

I have a gameObject that rotates around its own y-axis with:

transform.Rotate(Vector3.up, spinSpeed * Time.deltaTime);

This works, but now I want it to move left as well. When I add another translate, suddenly the Y axis for the rotation is displaced and the object starts rotating in a very wide circle!

transform.Rotate(Vector3.up, spinSpeed * Time.deltaTime);
transform.Translate(Vector3.left * 10 * Time.deltaTime);

How can I keep the object rotating around its own axis while moving left?

2

You’re translating the object by its own local Vector3.left, but as it rotates, what left means changes. The result is the object moving around the circumference of a circle while it spins.

To stop this, you could specify the space you want your rotation and translations to happen:

transform.Rotate(Vector3.up, spinSpeed * Time.deltaTime, Space.Self);
transform.Translate(Vector3.left * 10 * Time.deltaTime, Space.World);

Now the rotation is local, but the translation is relative to the world’s Vector3.Left.

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