void update_rightclickselection() {
   if (Center.rightMouseDown()) {
     if (!checkMouseOver()) return;
     if (Center.rightMouseClicked()) {
       Vector2 mousepos = screenToMap(Center.mousePosition());
       rightclickdragstartposition = mousepos;
       float dist = 99999;
       ArrayList<EventLocation> selectedlocations = new ArrayList<EventLocation>();
       for (EventLocation location : spawns) {
         float d = Vector2.distance(mousepos, location.position);
         if (d == dist) {
           selectedlocations.add(location);
         } else if (d < dist) {
           selectedlocations.clear();
           dist = d;
           selectedlocations.add(location);
         }
       }
       if (!Center.getKey(Keys.SHIFT) && !Center.getKey(Keys.CONTROL)) SpawnList.clearSelections();
       for (EventLocation location : selectedlocations) {
         SpawnList.instance.selectedSpawns.add(location);
         SpawnList.instance.focusOnBar(spawns.indexOf(location));
       }
     }
     if (rightclickdragstartposition == null) return;
     Vector2 mousepos = screenToMap(Center.mousePosition());
     if (!Vector2.distanceLessThan(rightclickdragstartposition, mousepos, .1f)) {
       Vector2 pos0 =
           new Vector2(
               mousepos.x < rightclickdragstartposition.x
                   ? mousepos.x
                   : rightclickdragstartposition.x,
               mousepos.y < rightclickdragstartposition.y
                   ? mousepos.y
                   : rightclickdragstartposition.y);
       Vector2 pos1 =
           new Vector2(
               mousepos.x > rightclickdragstartposition.x
                   ? mousepos.x
                   : rightclickdragstartposition.x,
               mousepos.y > rightclickdragstartposition.y
                   ? mousepos.y
                   : rightclickdragstartposition.y);
       if (!Center.getKey(Keys.SHIFT) && !Center.getKey(Keys.CONTROL)) SpawnList.clearSelections();
       for (EventLocation location : spawns) {
         if (location.position.x > pos0.x
             && location.position.y > pos0.y
             && location.position.x < pos1.x
             && location.position.y < pos1.y) SpawnList.selectedSpawns.add(location);
       }
     }
   } else rightclickdragstartposition = null;
 }