modified lib GPC for header only

worked on 3d traytracing

wifi/estimate/ray3/DataMap3.h

@@ -5,6 +5,7 @@
 #include "../../../geo/BBox3.h"
 #include <vector>
 #include <functional>
+#include <mutex>
 
 template <typename T> class DataMap3 {
 
@@ -189,6 +190,8 @@ private:
 
 struct DataMap3SignalEntry {
 
+
+
 	struct Entry {
 		float rssi;
 		float distanceToAP;
@@ -198,8 +201,11 @@ struct DataMap3SignalEntry {
 	std::vector<Entry> entries;
 
 	void add(const float rssi, const float distanceToAP) {
+		static std::mutex mtx;
 		Entry e(rssi, distanceToAP);
+		mtx.lock();
 		entries.push_back(e);
+		mtx.unlock();
 	}
 
 	float getMaxRSSI() const {