From 91d3a0352088611d3b78d3344b7a2bf2d4955a0a Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Tue, 6 May 2008 21:07:11 +0000
Subject: client-side frame interpolation: frames and timers

---
 src/core/gameinterface.cc | 48 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

(limited to 'src/core/gameinterface.cc')

diff --git a/src/core/gameinterface.cc b/src/core/gameinterface.cc
index 5789592..8d351a0 100644
--- a/src/core/gameinterface.cc
+++ b/src/core/gameinterface.cc
@@ -91,7 +91,53 @@ void GameInterface::clear()
 
 	// remove all models
 	model::Model::clear();
+
+	game_previousframetime = 0;
+	game_serverframetime = 0;
+	game_clientframetime = 0;
+	game_timestep = 0;
+	game_frames = 0;
 }
 
+void GameInterface::reset_clientstate(float servertime)
+{
+	game_timestep =  (servertime - game_serverframetime);
+
+	if (game_timestep < 0)
+		game_timestep = 0;
+
+	game_previousframetime = game_serverframetime;
+	game_serverframetime = servertime;
+	game_clientframetime = game_previousframetime;
+
+	std::map<unsigned int, core::Entity *>::iterator it;
+	for (it=core::Entity::registry.begin(); it != core::Entity::registry.end(); it++) {
+		
+		core::Entity *entity = (*it).second;
+
+		if (entity->state() && !(entity->flags() & Entity::Static))
+			entity->state()->assign(entity);
+	}
+	
+	game_frames = 0;
+}
 
-} // namespace core
+void GameInterface::update_clientstate()
+{
+	game_frames++;
+	game_clientframetime += game_timestep;
+
+	if (game_clientframetime > game_serverframetime)
+		game_clientframetime = game_serverframetime;
+}
+
+float GameInterface::timeoffset() {
+	float d = game_serverframetime - game_previousframetime;
+	if (d < 0)
+		d = 1;
+	float t = game_serverframetime - game_clientframetime;
+
+	return t/d;
+}
+
+}
-- 
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