Throttle framerates down to save CPU cycles. Now that we're getting high

framerates in OpenGL even on older hardware, this should be done to
conserve on CPU usage, rather than stressing it with more frames than
the monitor can render.

Signed-off-by: Ira Rice <irarice@gmail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/game.cpp b/src/game.cpp
index a346616f..7f0186d1 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -408,8 +408,11 @@ void Game::optionChanged(const std::string &name)
 {
     int fpsLimit = (int) config.getValue("fpslimit", 0);
 
-    // Calculate new minimum frame time
-    mMinFrameTime = fpsLimit ? 1000 / fpsLimit : 0;
+    // Calculate new minimum frame time. If one isn't set, use 60 FPS.
+    // (1000 / 60 is 16.66) Since the client can go well above the refresh
+    // rates for monitors now in OpenGL mode, this cutoff is done to help
+    // conserve on CPU time.
+    mMinFrameTime = fpsLimit ? 1000 / fpsLimit : 16;
 
     // Reset draw time to current time
     mDrawTime = tick_time * 10;