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engines/hpl1/engine/system/LogicTimer.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#ifndef HPL_LOGICTIMER_H
+#define HPL_LOGICTIMER_H
+
+namespace hpl {
+
+class LowLevelSystem;
+
+class cLogicTimer {
+public:
+	/**
+	 *
+	 * \param alUpdatesPerSec Number of updates per second.
+	 * \param *apLowLevelSystem
+	 * \return
+	 */
+	cLogicTimer(int alUpdatesPerSec, LowLevelSystem *apLowLevelSystem);
+	~cLogicTimer();
+
+	/**
+	 * Reset the time. Do this when the logical update of the game has been ide, ie while loading.
+	 */
+	void Reset();
+	/**
+	 * Check with the time if it is time for another logical update
+	 * \return true if logic should be updated, else false.
+	 */
+	bool WantUpdate();
+
+	/**
+	 * Resets various variables that makes the graphics is never frozen.
+	 */
+	void EndUpdateLoop();
+
+	/**
+	 * Set the number of times per second to update
+	 * \param alUpdatesPerSec
+	 */
+	void SetUpdatesPerSec(int alUpdatesPerSec);
+
+	/**
+	 * Sets the maximum updates in a row.
+	 * \param alUpdatesPerSec
+	 */
+	void SetMaxUpdates(int alMax);
+
+	/**
+	 * Get the number of updates per second.
+	 */
+	int GetUpdatesPerSec();
+	/**
+	 * Get the size of each step in seconds.
+	 */
+	float GetStepSize();
+
+private:
+	void Update();
+
+	double mlLocalTime;
+	double mlLocalTimeAdd;
+
+	int mlMaxUpdates;
+	int mlUpdateCount;
+
+	LowLevelSystem *mpLowLevelSystem;
+};
+
+} // namespace hpl
+
+#endif // HPL_LOGICTIMER_H