focus-map: (manual focus point grid) - specify z level at points, fit to 3d surface, interpolate for acquisition scan fovs

[sohamazing]

Workflow

• click checkbox - "Focus Map" in in wellplate/flexibleMultiPointWidget
• creates grid of focus points that we can navigate to and set the Z level
• fits 3d surface from the focus points when we start acquisition
• interpolates and updates z level for each fov of each region

FocusMapWidget:

• in cameraTabWidget (can be moved to recordTabWidget)
• add, remove, next, edit buttons
• set grid size with spinbox for rows x cols
• until sufficient # points set
  • select a focus point in dropdown menu to navigate to it
  • update z level of the current focus point

FocusMap:

• handles the math for fitting 3d surface from a set of x,y,z points
• need at least 4 points to fit surface
• 'spline' or 'rbf' surface fitting methods
• smoothing factor for surface fitting

NavigationViewer:

• green dots for focus points
• spans the scan bounds
  • fov coordinates and region bounds now centralized in ScanCoordinates

in wellplate/flexibleMultiPointWidget.toggle_acquisition()

• fit surface (focusMapWidget.fit_surface)
• set the fitted focus map in multipointController

multipointCOntroller.run_acquisition()

• updates fovs of the scanCoordinates so that the acquisition adjusts to the correct z levels

todo:

• add import/export focus point grid
• way to lock in surface (do not refit anymore)
• cache focus surface so that it does not reset after an acquisition
• update z button (exists) and update x,y button (to add)
  • update the x,y location of the current focus point without typing in the coords
  • edit button can instead open csv with all focus points instead of just the current