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engines/hpl1/engine/system/LogicTimer.cpp

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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.
+ */
+
+#include "hpl1/engine/system/LogicTimer.h"
+#include "hpl1/engine/system/low_level_system.h"
+
+namespace hpl {
+
+//////////////////////////////////////////////////////////////////////////
+// CONSTRUCTORS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+cLogicTimer::cLogicTimer(int alUpdatesPerSec, LowLevelSystem *apLowLevelSystem) {
+	mlMaxUpdates = alUpdatesPerSec;
+	mlUpdateCount = 0;
+
+	mpLowLevelSystem = apLowLevelSystem;
+
+	SetUpdatesPerSec(alUpdatesPerSec);
+}
+
+//-----------------------------------------------------------------------
+
+cLogicTimer::~cLogicTimer() {
+}
+
+//-----------------------------------------------------------------------
+
+//////////////////////////////////////////////////////////////////////////
+// PUBLIC METHODS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+void cLogicTimer::Reset() {
+	mlLocalTime = (double)GetApplicationTime();
+}
+
+//-----------------------------------------------------------------------
+
+bool cLogicTimer::WantUpdate() {
+	++mlUpdateCount;
+	if (mlUpdateCount > mlMaxUpdates)
+		return false;
+
+	if (mlLocalTime < (double)GetApplicationTime()) {
+		Update();
+		return true;
+	}
+	return false;
+}
+
+//-----------------------------------------------------------------------
+
+void cLogicTimer::EndUpdateLoop() {
+	if (mlUpdateCount > mlMaxUpdates) {
+		Reset();
+	}
+
+	mlUpdateCount = 0;
+}
+
+//-----------------------------------------------------------------------
+
+void cLogicTimer::SetUpdatesPerSec(int alUpdatesPerSec) {
+	mlLocalTimeAdd = 1000.0 / ((double)alUpdatesPerSec);
+	Reset();
+}
+
+//-----------------------------------------------------------------------
+
+void cLogicTimer::SetMaxUpdates(int alMax) {
+	mlMaxUpdates = alMax;
+}
+
+//-----------------------------------------------------------------------
+
+int cLogicTimer::GetUpdatesPerSec() {
+	return (int)(1000.0 / ((double)mlLocalTimeAdd));
+}
+
+//-----------------------------------------------------------------------
+
+float cLogicTimer::GetStepSize() {
+	return ((float)mlLocalTimeAdd) / 1000.0f;
+}
+
+//-----------------------------------------------------------------------
+
+//////////////////////////////////////////////////////////////////////////
+// PRIVATE METHODS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+void cLogicTimer::Update() {
+	mlLocalTime += mlLocalTimeAdd;
+}
+
+//-----------------------------------------------------------------------
+
+} // namespace hpl