[graphics] tie generic (#1341)

* [gtie] tie inst and proto functions

* first chain input to generic ee looks good

* m

* works

* ugh

* add tie generic

* rm debug print

* rm generic ties from fr3

decompiler/level_extractor/extract_tie.cpp

@@ -2034,6 +2034,10 @@ void add_vertices_and_static_draw(tfrag3::TieTree& tree,
 
   // loop over all prototypes
   for (auto& proto : protos) {
+    if (proto.uses_generic) {
+      // generic ties go through generic
+      continue;
+    }
     //    bool using_wind = true;  // hack, for testing
     bool using_wind = proto.stiffness != 0.f;