Recently a user was asking about aligning the origin of a DXF import to the pcbnew grid. I played with the import options a little in default and OpenGL views and found:
1. default: except for "center on page" which seems to place the DXF origin at the center of the page and aligned to the grid, the other import options don't make sense to me. 2. OpenGL: the different import options only seem to affect the point which is selected as the reference point for moving the DXF outline. In the first case I guess the user could always select "center on page", but what if the user doesn't want the outline centered on the page? In the second case while it is nice to set the reference point where you want, the user has no control of what the reference point is and most likely will be interested at placing the DXF origin at a specified point on the page. Since the location of the chosen reference point for moving the outline is not necessarily an integral number of grid divisions in X and Y relative to the DXF origin, it can be impossible to place the DXF origin where the user desires. So, for consistency and greater flexibility, what do people think about specifying the grid point at which to locate the DXF origin? We can remove the positioning options in the DXF import dialog and replace them with a dialog specifying UNIT (mm, inch) and X, Y position on the page. There may be no need to allow for the option to drag the outline immediately after the import as is currently done in OpenGL. - Cirilo
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