wip: wait until data is ready and has been consumed (couples physics and rendering thread again)

include/physics.hpp

@@ -2,6 +2,7 @@
 #define __PHYSICS_HPP_
 
 #include <atomic>
+#include <condition_variable>
 #include <mutex>
 #include <queue>
 #include <raylib.h>
@@ -150,7 +151,11 @@ class ThreadedPhysics {
     TracyLockable(std::mutex, command_mtx);
     std::queue<Command> pending_commands;
 
-    TracyLockable(std::mutex, pos_mtx);
+    TracyLockable(std::mutex, data_mtx);
+    std::condition_variable_any data_ready_cnd;
+    std::condition_variable_any data_consumed_cnd;
+    bool data_ready = false;
+    bool data_consumed = true;
     std::vector<Mass> masses;                    // Read by renderer
     std::unordered_map<State, int> state_masses; // Read by renderer
     std::vector<Spring> springs;                 // Read by renderer

include/renderer.hpp

@@ -61,10 +61,9 @@ public:
   }
 
 private:
-  auto AllocateGraphInstancing(const std::vector<Mass> &masses) -> void;
+  auto AllocateGraphInstancing(std::size_t size) -> void;
 
-  auto ReallocateGraphInstancingIfNecessary(const std::vector<Mass> &masses)
-      -> void;
+  auto ReallocateGraphInstancingIfNecessary(std::size_t size) -> void;
 
 public:
   auto UpdateTextureSizes() -> void;