Compute the extents of the coordinate system before this transformation was applied and store the resulting
corner coordinates in <code>corner</code> and the span vectors in <code>xDir</code> and <code>yDir</code>.
<p>
That means, given the maximum extents of the coordinate system between <code>[-1..+1]</code> in all dimensions,
this method returns one corner and the length and direction of the two base axis vectors in the coordinate
system before this transformation is applied, which transforms into the corner coordinates <code>[-1, +1]</code>.
@param corner
will hold one corner of the span
@param xDir
will hold the direction and length of the span along the positive X axis
@param yDir
will hold the direction and length of the span along the positive Y axis
@return this
Compute the extents of the coordinate system before this transformation was applied and store the resulting corner coordinates in <code>corner</code> and the span vectors in <code>xDir</code> and <code>yDir</code>. <p> That means, given the maximum extents of the coordinate system between <code>[-1..+1]</code> in all dimensions, this method returns one corner and the length and direction of the two base axis vectors in the coordinate system before this transformation is applied, which transforms into the corner coordinates <code>[-1, +1]</code>.
@param corner will hold one corner of the span @param xDir will hold the direction and length of the span along the positive X axis @param yDir will hold the direction and length of the span along the positive Y axis @return this