public Vector3f subtract(float subtractX, float subtractY, float subtractZ) {
        return new Vector3f(x - subtractX, y - subtractY, z - subtractZ);
    }
Subtracts the specified amounts from the vector's components and returns
the difference as a new instance. The current instance is unaffected.

@param subtractX the amount to subtract from the X component
@param subtractY the amount to subtract from the Y component
@param subtractZ the amount to subtract from the Z component
@return a new Vector3f
jme3-core/src/main/java/com/jme3/math/Vector3f.java