Changeset 3304 for code/trunk/src/core/Game.cc

Timestamp:

Jul 18, 2009, 6:23:31 PM (15 years ago)

Author:

rgrieder

Message:

Merged netp6 branch back to the trunk.

Location:

code/trunk

Files:

• . (modified) (1 prop)
• src/core/Game.cc (modified) (3 diffs)

code/trunk/src/core/Game.cc

@@ -40 +40 @@
 #include "util/Debug.h"
 #include "util/Exception.h"
+#include "util/Sleep.h"
 #include "util/SubString.h"
 #include "Clock.h"
@@ -95 +96 @@
             SetConfigValue(statisticsAvgLength_, 1000000)
                 .description("Sets the time in microseconds interval at which average fps, etc. gets calculated.");
+            SetConfigValue(fpsLimit_, 50)
+                .description("Sets the desired framerate (0 for no limit).");
         }
 
         unsigned int statisticsRefreshCycle_;
         unsigned int statisticsAvgLength_;
+        unsigned int fpsLimit_;
     };
 
@@ -192 +196 @@
 
         // START GAME
-        this->gameClock_->capture(); // first delta time should be about 0 seconds
+        // first delta time should be about 0 seconds
+        this->gameClock_->capture();
+        // A first item is required for the fps limiter
+        StatisticsTickInfo tickInfo = {0, 0};
+        statisticsTickTimes_.push_back(tickInfo);
         while (!this->bAbort_ && (!this->activeStates_.empty() || this->requestedStateNodes_.size() > 0))
         {
+            uint64_t currentTime = this->gameClock_->getRealMicroseconds();
+
+            uint64_t nextTickTime = statisticsTickTimes_.back().tickTime + static_cast<uint64_t>(1000000.0f / configuration_->fpsLimit_);
+            if (currentTime < nextTickTime)
+            {
+                usleep(nextTickTime - currentTime);
+                continue;
+            }
             this->gameClock_->capture();
-            uint64_t currentTime = this->gameClock_->getMicroseconds();
 
             // STATISTICS