Obtain the extents of the view transformation of <code>this</code> matrix and store it in <code>area</code>.
This can be used to determine which region of the screen (i.e. the NDC space) is covered by the view.
@param area
will hold the view area as <code>[minX, minY, maxX, maxY]</code>
@return area
Obtain the extents of the view transformation of <code>this</code> matrix and store it in <code>area</code>. This can be used to determine which region of the screen (i.e. the NDC space) is covered by the view.
@param area will hold the view area as <code>[minX, minY, maxX, maxY]</code> @return area