public Vector3f add(float addX, float addY, float addZ) {
        return new Vector3f(x + addX, y + addY, z + addZ);
    }
Adds specified amounts to the vector's components and returns the sum as
a new instance. The current instance is unaffected.

@param addX the amount to add to the X component
@param addY the amount to add to the Y component
@param addZ the amount to add to the Z component
@return a new Vector3f
jme3-core/src/main/java/com/jme3/math/Vector3f.java