wip: integrating threaded decoupled physics

Current Issues:
- HUGE memory leak
- HUGE amount of needles copying
- FillGraph() does thousands of lock_guards instead of one
- Can no longer rely on new states appearing immediately - have to check
each access
- Physics run as fast as possible, no constant sim speed`
- Irregular long freezes

include/state.hpp

@@ -1,7 +1,6 @@
 #ifndef __STATE_HPP_
 #define __STATE_HPP_
 
-#include "config.hpp"
 #include "physics.hpp"
 #include "presets.hpp"
 #include "puzzle.hpp"
@@ -10,7 +9,7 @@
 
 class StateManager {
 public:
-  MassSpringSystem &mass_springs;
+  ThreadedPhysics &physics;
 
   int current_preset;
   State starting_state;
@@ -23,12 +22,12 @@ public:
   std::unordered_set<State> visited_states;
 
 public:
-  StateManager(MassSpringSystem &_mass_springs)
-      : mass_springs(_mass_springs), current_preset(0),
+  StateManager(ThreadedPhysics &_physics)
+      : physics(_physics), current_preset(0),
         starting_state(generators[current_preset]()),
         current_state(starting_state), previous_state(starting_state),
         edited(false) {
-    mass_springs.AddMass(MASS, false, current_state);
+    physics.AddMassCmd(current_state);
   }
 
   StateManager(const StateManager &copy) = delete;