gis - Assign new ol.View.Extent with coordnation points -

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i'm new gis concepts might noob question. i'm using openlayers 3 map. want restrict panning specific area.

the code came across should don't know values assign minx, miny, maxx, , maxy variables.

    var view = new ol.view({         center: new ol.proj.transform([-116.284636, 43.619528], 'epsg:4326', 'epsg:3857'),         zoom: 11,         extent: [minx, miny, maxx, maxy]     });

i've gotten coordinates click evt.coordinate variable don't know how correlate parameters of extent.

    left top     '0' => "-12972739.566503541"     '1' => "5427487.630417225"      right top     '0' => "-12913118.684441104"     '1' => "5426723.260134374"      bottom right     '0' => "-12908838.210857134"     '1' => "5364962.141279951"      bottom left     '0' => "-12983440.750463465"     '1' => "5367713.874298218"

can explain how take coordinates , create new extent?

thanks

minx = bottomleft[0] miny = bottomleft[1] maxx = topright[0] maxy = topright[1]

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