Initial work on spawning tangibles from Luprex

Source/Integration/LockedWrapper.h

@@ -22,6 +22,8 @@ class FLockedWrapper {
 private:
 	FLockableWrapper& Lockable;
 
+	using IdList = TArrayView<const int64>;
+
 public:
 	// The constructor of the FLockedWrapper claims the mutex.
 	FLockedWrapper(FLockableWrapper& w) : Lockable(w) {
@@ -56,4 +58,16 @@ public:
 	// Fetch Stdout as a string.
 	//
 	FString FetchStdout();
+
+	// Get the current Actor ID.
+	//
+	int64 GetActor();
+
+	// Get the list of tangibles near the actor.
+	//
+	// This function is fast but not free.  You should fetch this
+	// once per frame and then store the IdList somewhere (like
+	// in the TangibleManager, for example).
+	//
+	IdList GetNear(int64 id, double rx, double ry, double rz);
 };