Qtfred special points

[MjnMixael]

Coordinate Points (Special Points)

Adds a new mission object type: coordinate points - named, positioned markers backed by a real Objects[] slot (OBJ_COORDINATE_POINT). Like waypoints, they hold a position but no physics; unlike waypoints, they carry display and gameplay metadata (color, 2D shape, size, escort-list priority, TvT team restriction) and can be rendered and targeted in-mission.

What's included

• Object type + rendering - flat 2D shapes drawn at the point's location; optional in-mission visibility (editor-only by default).
• QtFRED editor - full Coordinate Point dialog (shape as NGon/Star/Custom radios + tabled-shape dropdown, color, size, angle, escort priority, team, layer, visibility), scene browser / layer manager / mission stats integration, and help docs.
• Shapes table - new coordinate_points.tbl (#Coordinate Shapes) defining custom tabled shapes, extensible by mods via *-cps.tbm (additive; duplicate and reserved names rejected).
• SEXPs - two new operators (point-targeted, toggle-point-visibility) plus a new OPF_COORDINATE_POINT arg type. Existing position/distance/geometry operators now accept coordinate points: get-object-x/y/z, set-object-position, distance / distance-to-center / distance-bbox (and the *-to-subsystem variants), is-in-box, set-object-facing-object, angle-fvec-target, and the camera facing-object / host / target operators.
• Lua - l_CoordinatePoint type (name, group, position, escort priority, visibility, team, escort add/remove) and a mission.CoordinatePoints sublibrary (index by number or name, # length); OSWPT handles resolve to coordinate points.
• Multiplayer - points participate in net-signature serialization; set-object-position and toggle-point-visibility sync to clients; per-point TvT team filtering on render.

Shapes table (coordinate_points.tbl)

Each entry needs a $Name:, a $Vertices: list (flat x y float pairs at unit radius, point-up, wound CCW), and a $Triangles: list (flat CCW vertex indices, three per triangle). The names NGon and Star are reserved for the procedural primitives. Example (the shipped Cross):

#Coordinate Shapes

$Name: Cross
$Vertices: (
    -0.33  1.00     0.33  1.00     0.33  0.33     1.00  0.33
     1.00 -0.33     0.33 -0.33     0.33 -1.00    -0.33 -1.00
    -0.33 -0.33    -1.00 -0.33    -1.00  0.33    -0.33  0.33
)
$Triangles: (
    ; vertical bar
     0  7  6      0  6  1
    ; horizontal bar
    10  9  4     10  4  3
)

#End

Notes

• Backwards compatible: no changes to existing mission behavior; the new #Coordinate Points block and coordinate_points.tbl are optional. +Shape: accepts legacy aliases (Triangle/Diamond/Pentagon → NGon presets).
• create-/delete-coordinate-point SEXPs are intentionally deferred (runtime naming + multiplayer object-creation complexity); the Lua API and #Coordinate Points cover authored points.