public void scale(Vector3f scale) {
        m00 *= scale.x;
        m10 *= scale.x;
        m20 *= scale.x;
        m01 *= scale.y;
        m11 *= scale.y;
        m21 *= scale.y;
        m02 *= scale.z;
        m12 *= scale.z;
        m22 *= scale.z;
    }
Scales each column by the corresponding element of the argument.

@param scale the scale factors: X scales column 0, Y scales column 1, Z
    scales column 2 (not null, unaffected)
jme3-core/src/main/java/com/jme3/math/Matrix3f.java