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javascript - How do i get the coordinates of vertices of shapes instead of the control corners coordinates in fabric js?

The following code gives me coordinates of control corners but I want to calculate the coordinates of vertices of triangle, pentagon, hexagon etc.,

<!-- fabric js function to return coordinates-->
function getCoords(oCoords) {
  return {
    tl: new fabric.Point(oCoords.tl.x, oCoords.tl.y),
    tr: new fabric.Point(oCoords.tr.x, oCoords.tr.y),
    bl: new fabric.Point(oCoords.bl.x, oCoords.bl.y),
    br: new fabric.Point(oCoords.br.x, oCoords.br.y)
  }
}

<!--fabric js event handler-->
canvas.on('mouse:move', function(e){
  console.log('over1',e.target)
  if(e.target && e.target !== canvas.getActiveObject())
    canvas.setActiveObject(e.target)
  var thisCoords = getCoords(canvas.getActiveObject().oCoords);
 });
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