Polygon center coordinates.

Raveriux

Is it possible to determine center coordinates of the polygon? Or maybe its worth to have posibillity to set the polygon coordinates like for the box? In some cases it would be nice feature.

davidnhutch

Not sure I understand.

This is not how polygons are defined in GDS/OAS spec. However I believe what you want is to draw a polygon, make it into a cell, then place the cell at some x and y location.

1. Draw a polygon
2. Select it
3. Edit > Selection > Make cell
4. Select the cell, if it's not already selected. (You must have "Select top level objects" enabled first)
5. Press 'q'
6. Now you can place the cell at any x and y location using the x and y boxes in that dialog window.

This can also be done programmatically, via script.

However, the default cell origin in the above procedure is at the bottom left of the cell. If you want this truly at the 'center' of the polygon then you have to define what you mean by 'center'. I presume you mean 'centroid', though it is conceivable you can imagine a different definition for center of polygon. Anyway, to do that you have to edit that cell as new top, move it so the origin of that cell is at your centroid, then go back to the parent cell and move it back so now your cell origins are all instanced in the correct location.

Alternatively, if you want to edit the polygon vertices, select the polygon (not its cell) and press 'q'.

Matthias

Hi all,

I understand that you want to position the polygon by entering a numerical position.

There is "Edit/Move By" which will move the selected relative to the current position. I think I could add "Move To" which does the same in an absolute way.

But I wonder what will be the "center" of a polygon - will this be the center of the bounding box?

Matthias

Raveriux

The "center" of ploygon is the center of bounding box. For example if you have so polygon like alligment cross its nice to have feature to place the center of this polygon in the defined possition.

friendfx

Hi Raveriux,

Here is a small script which will show a list of bounding box centre coordinates of every selected shape:

module Discussion592

  include RBA
  mw = Application::instance.main_window
  lv =mw.current_view
  info = "The center points of the selection's\nbounding boxes are:\n"
  lv.each_object_selected do |sel|
    if !sel.is_cell_inst?
      shape = sel.shape
      info += "(#{shape.bbox.center})\n"
    end
  end
  RBA::QMessageBox::information(mw, "BBOX Center", info)

end

Raveriux

Thank You!