From 6054bf7e907a2cb9507ea3246e18ef177eae61c0 Mon Sep 17 00:00:00 2001
From: zicodxx <>
Date: Tue, 30 Sep 2008 00:18:39 +0000
Subject: [PATCH] Added new function to calculate common timesteps; Increased
 MAXIMUM_FPS to 200 for release and 1000 for debug; Used fixed sim_time for
 do_physics_sim and Interpolating to ensure collisions stay accurate at high
 FPS; New code and faster code for dot products by The_Lion; Disabled Nice-FPS
 and common Frame-Loop if VSync is active; More accurate delta timer for mouse
 (consider overhead); Added SDL_(Un)LockAudio for old SDL Audio interface;
 General support for up to 16 mouse buttons; Code cleanup; Made some AI
 movement and Player shaking FPS-independent

---
 arch/sdl/timer.c |  8 +++-----
 main/game.c      | 13 +++++--------
 2 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/arch/sdl/timer.c b/arch/sdl/timer.c
index e3c427d05..8daba5e1a 100644
--- a/arch/sdl/timer.c
+++ b/arch/sdl/timer.c
@@ -38,12 +38,10 @@ void timer_delay2(int fps)
 	static u_int32_t FrameStart=0;
 	u_int32_t FrameLoop=0;
 
-	if (GameCfg.VSync)
-		return;
-
-	while (FrameLoop < 1000/fps)
+	while (FrameLoop < 1000/(GameCfg.VSync?MAXIMUM_FPS:fps))
 	{
-		SDL_Delay(1);
+		if (!GameCfg.VSync)
+			SDL_Delay(1);
 		FrameLoop=SDL_GetTicks()-FrameStart;
 	}
 
diff --git a/main/game.c b/main/game.c
index 3a3227f29..1a1fa58c4 100644
--- a/main/game.c
+++ b/main/game.c
@@ -736,15 +736,12 @@ void calc_frame_time()
 	timer_value = timer_get_fixed_seconds();
 	FrameTime = timer_value - last_timer_value;
 
-	if (!GameCfg.VSync)
+	while (FrameTime < f1_0 / (GameCfg.VSync?MAXIMUM_FPS:GameArg.SysMaxFPS))
 	{
-		while (FrameTime < f1_0 / GameArg.SysMaxFPS)
-		{
-			if (GameArg.SysUseNiceFPS)
-				timer_delay(f1_0 / GameArg.SysMaxFPS - FrameTime);
-			timer_value = timer_get_fixed_seconds();
-			FrameTime = timer_value - last_timer_value;
-		}
+		if (GameArg.SysUseNiceFPS && !GameCfg.VSync)
+			timer_delay(f1_0 / GameArg.SysMaxFPS - FrameTime);
+		timer_value = timer_get_fixed_seconds();
+		FrameTime = timer_value - last_timer_value;
 	}
 
 	if ( Game_turbo_mode )