Dont update particles located in long distance from screen.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/particle/particle.cpp b/src/particle/particle.cpp
index ac9ba8394..f6b951004 100644
--- a/src/particle/particle.cpp
+++ b/src/particle/particle.cpp
@@ -25,6 +25,8 @@
 #include "configuration.h"
 #include "logger.h"
 
+#include "gui/viewport.h"
+
 #include "particle/animationparticle.h"
 #include "particle/particleemitter.h"
 #include "particle/rotationalparticle.h"
@@ -238,10 +240,24 @@ bool Particle::update() restrict2
 
     // Update child particles
 
+    const int cameraX = viewport->getCameraX();
+    const int cameraY = viewport->getCameraY();
+    const float x1 = static_cast<float>(cameraX - 3000);
+    const float y1 = static_cast<float>(cameraY - 2000);
+    const float x2 = static_cast<float>(cameraX + 3000);
+    const float y2 = static_cast<float>(cameraY + 2000);
+
     for (ParticleIterator p = mChildParticles.begin(),
          fp2 = mChildParticles.end(); p != fp2; )
     {
         Particle *restrict const particle = *p;
+        const float posX = particle->mPos.x;
+        const float posY = particle->mPos.y;
+        if (posX < x1 || posX > x2 || posY < y1 || posY > y2)
+        {
+            ++p;
+            continue;
+        }
         // move particle with its parent if desired
         if (particle->mFollow)
             particle->moveBy(change);