Multiply the transpose of the given 4x4 matrix <code>mat</code> with <code>this</code>.
<p>
This method assumes the <code>w</code> component of <code>this</code> to be <code>0.0</code>.
@param mat
the matrix whose transpose to multiply this vector by
@return this
Multiply the transpose of the given 4x4 matrix <code>mat</code> with <code>this</code>. <p> This method assumes the <code>w</code> component of <code>this</code> to be <code>0.0</code>.
@param mat the matrix whose transpose to multiply this vector by @return this