Now the spatialmap determines the 'wiggle factor' when there's multiple entities in a cell, which staggers them visually. Closes #78.

spatialmap.cpp

@@ -93,13 +93,23 @@ FoundEntities SpatialMap::neighbors(Point cell, bool diag) const {
 }
 
 inline void update_sorted(SortedEntities& sprite_distance, PointEntityMap& table, Point from, int max_dist) {
+  Point seen{0,0};
+  float wiggle = 0.0f;
+
   for(const auto &rec : table) {
     Point sprite = rec.first;
     int inside = (from.x - sprite.x) * (from.x - sprite.x) +
         (from.y - sprite.y) * (from.y - sprite.y);
 
+    if(sprite == seen) {
+      wiggle += 0.02f;
+    } else {
+      wiggle = 0.0f;
+      seen = sprite;
+    }
+
     if(inside < max_dist) {
-      sprite_distance.push_back({inside, rec.second.entity});
+      sprite_distance.push_back({inside, rec.second.entity, wiggle});
     }
   }
 }
@@ -109,7 +119,9 @@ SortedEntities SpatialMap::distance_sorted(Point from, int max_dist) {
 
   update_sorted(sprite_distance, $collision, from, max_dist);
 
-  std::sort(sprite_distance.begin(), sprite_distance.end(), std::greater<>());
+  std::sort(sprite_distance.begin(), sprite_distance.end(), [](auto &a, auto &b) {
+      return a.dist_square > b.dist_square;
+  });
 
   return sprite_distance;
 }