Started with TARCAP because they're simple, but will follow and extend
this to the other flight plans next.
This works by building navigation meshes (navmeshes) of the theater
based on the threat regions. A navmesh is created for each faction to
allow the unique pathing around each side's threats. Navmeshes are built
such that there are nav edges around threat zones to allow the planner
to pick waypoints that (slightly) route around threats before
approaching the target.
Using the navmesh, routes are found using A*. Performance appears
adequate, and could probably be improved with a cache if needed since
the small number of origin points means many flights will share portions
of their flight paths.
This adds a few visual debugging tools to the map. They're disabled by
default, but changing the local `debug` variable in `DisplayOptions` to
`True` will make them appear in the display options menu. These are:
* Display navmeshes (red and blue). Displaying either navmesh will draw
each navmesh polygon on the map view and highlight the mesh that
contains the cursor. Neighbors are indicated by a small yellow line
pointing from the center of the polygon's edge/vertext that is shared
with its neighbor toward the centroid of the zone.
* Shortest path from control point to mouse location. The first control
point for the selected faction is arbitrarily selected, and the
shortest path from that control point to the mouse cursor will be
drawn on the map.
* TARCAP plan near mouse location. A TARCAP will be planned from the
faction's first control point to the target nearest the mouse cursor.
https://github.com/Khopa/dcs_liberation/issues/292
Creates threat zones around airfields and non-trivial air defenses (it's
not worth dodging anything with a threat range under 3nm). These threat
zones can be used to aid mission planning and waypoint placement.
https://github.com/Khopa/dcs_liberation/issues/292
Not converting all at once so I can prove the concept. After that we'll
want to cover all the cases where an int distance or speed is a part of
the save game (I've done one of them here with `Flight.alt`) so further
cleanups don't break save compat.
https://github.com/Khopa/dcs_liberation/issues/558
* Introduce a real type.
* Rewrite _transform_point to make use of Point.
* Add shift modifier for large (10 pixel) adjustements to reference
points. Unmodified behavior is now single pixel.
* Use WASD for moving the second point (shift modified numpad keys don't
seem to work).
* Add a debug option to draw transformed reference points to check for
errors. If they don't overlap, something is wrong.
* Cleaned up all the existing reference points. Caucasus in particular
is now *much* better.
As an added bonus, the cleanup for carrier movement projection now also
shows an invalid destination when the destination is on land.
