1 files changed, 12 insertions, 0 deletions
diff --git a/src/particle/particlevector.cpp b/src/particle/particlevector.cpp
index d0594a2dd..a38db6d01 100644
--- a/src/particle/particlevector.cpp
+++ b/src/particle/particlevector.cpp
@@ -95,3 +95,15 @@ void ParticleVector::moveTo(const float x, const float y)
         }
     }
 }
+
+size_t ParticleVector::usedSize() const
+{
+    size_t cnt = 0;
+    for (std::vector<Particle *>::const_iterator it = mIndexedElements.begin();
+         it != mIndexedElements.end(); ++it)
+    {
+        if (*it)
+            cnt ++;
+    }
+    return cnt;
+}