Matrix4d.set

Set this matrix to be equivalent to the rotation - and possibly scaling - specified by the given {@link Quaterniond}. <p> This method is equivalent to calling: <code>rotation(q)</code> <p> Reference: <a href="http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToMatrix/">http://www.euclideanspace.com/</a>

@see #rotation(ref Quaterniond)

@param q the {@link Quaterniond} @return this

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