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engines/pegasus/util.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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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/>.
+ *
+ */
+
+#include "common/random.h"
+#include "common/system.h"
+#include "common/util.h"
+
+#include "pegasus/util.h"
+
+namespace Pegasus {
+
+IDObject::IDObject(const int32 id) {
+	_objectID = id;
+}
+
+IDObject::~IDObject() {
+}
+
+int32 IDObject::getObjectID() const {
+	return _objectID;
+}
+
+int operator==(const IDObject &arg1, const IDObject &arg2) {
+	return arg1.getObjectID() == arg2.getObjectID();
+}
+
+int operator!=(const IDObject &arg1, const IDObject &arg2) {
+	return arg1.getObjectID() != arg2.getObjectID();
+}
+
+int32 pegasusRound(const int32 a, const int32 b) {
+	if (b < 0)
+		if (a < 0)
+			return -((a - (-b >> 1)) / -b);
+		else
+			return -((a + (-b >> 1)) / -b);
+	else
+		if (a < 0)
+			return (a - (b >> 1)) / b;
+		else
+			return (a + (b >> 1)) / b;
+}
+
+int32 linearInterp(const int32 start1, const int32 stop1, const int32 current1, const int32 start2, const int32 stop2) {
+	if (start2 == stop2)
+		return start2;
+	else
+		return start2 + pegasusRound((current1 - start1) * (stop2 - start2), (stop1 - start1));
+}
+
+uint32 tickCount() {
+	return g_system->getMillis() * 60 / 1000;
+}
+
+} // End of namespace Pegasus