spawn explosions only when really hitting thingsn.

game/state/state.cpp

@@ -203,8 +203,15 @@ namespace game {
 					continue;
 				}
 
+                bool spawnExplosion = true;
+
 				switch(evt.hit) {
 					case Hit::Planet:
+                        // TODO: add black spot on the planet.
+                        // TODO: if water planet, add waves
+                        // TODO: if gas planet, add nice gas explosion effect
+                        // and start burning on this spot for some time.
+
 						//std::cout<<"hit Planet" << std::endl;
 						break;
 
@@ -215,13 +222,16 @@ namespace game {
 
 					case Hit::BorderOfUniverse:
 						//std::cout<<"missile left the universe." << std::endl;
+                        spawnExplosion = false;
 						break;
 
 					default:
 						break;
 				}
 
+                if (spawnExplosion) {
                     addExplosionFromHit(&evt);
+                }
 
 				if (missile->trace != nullptr) {
 					missile->trace->finish();