fix: data race in world::init_world()

src/tools/cubed_random.cpp

@@ -2,17 +2,32 @@
 
 #include <Cubed/tools/log.hpp>
 
+#include <atomic>
+
 namespace Cubed {
 
+unsigned Random::get_base_seed() {
+    static unsigned base = [] {
+        std::random_device rd;
+        return rd();
+    }();
+    return base;
+}
+
+unsigned Random::get_thread_seed() {
+    static std::atomic<unsigned> counter{0};
+    thread_local static unsigned seed = get_base_seed() + counter.fetch_add(1);
+    return seed;
+}
+
 Random::Random() {
-    std::random_device d;
-    m_seed = d();
+    m_seed = get_thread_seed();
     Logger::info("Seed: {}", m_seed);
     m_engine.seed(m_seed);
 }
 
 Random& Random::get() {
-    static Random instance;
+    thread_local Random instance;
     return instance;
 }