1 files changed, 104 insertions, 0 deletions
diff --git a/engines/pegasus/neighborhood/mars/planetmover.cpp b/engines/pegasus/neighborhood/mars/planetmover.cpp
new file mode 100644
index 0000000000..ef26a7b573
--- /dev/null
+++ b/engines/pegasus/neighborhood/mars/planetmover.cpp
@@ -0,0 +1,104 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "pegasus/movie.h"
+#include "pegasus/pegasus.h"
+#include "pegasus/neighborhood/mars/constants.h"
+#include "pegasus/neighborhood/mars/hermite.h"
+#include "pegasus/neighborhood/mars/planetmover.h"
+#include "pegasus/neighborhood/mars/shuttleenergymeter.h"
+
+namespace Pegasus {
+
+static const TimeScale kRovingScale = kTractorBeamScale;
+static const TimeValue kRovingTime = kTenSeconds * kRovingScale;
+static const TimeValue kRovingSlop = kTwoSeconds * kRovingScale;
+
+static const CoordType kMaxVelocity = 20;
+
+PlanetMover::PlanetMover() {
+	setScale(kRovingScale);
+	_dropping = false;
+	_planetMovie = 0;
+}
+
+void PlanetMover::startMoving(Movie *planetMovie) {
+	_planetMovie = planetMovie;
+	_p4 = kPlanetStartTop;
+	_r4 = ((PegasusEngine *)g_engine)->getRandomNumber(kMaxVelocity - 1);
+	if (_r4 + _p4 < kPlanetStopTop)
+		_r4 = kPlanetStopTop - _p4;
+	newDestination();
+}
+
+void PlanetMover::stopMoving() {
+	stop();
+}
+
+void PlanetMover::dropPlanetOutOfSight() {	
+	stop();
+	CoordType currentLoc = hermite(_p1, _p4, _r1, _r4, _lastTime, _duration);
+	CoordType currentV = dHermite(_p1, _p4, _r1, _r4, _lastTime, _duration);
+	_p1 = currentLoc;
+	_r1 = currentV;
+	_p4 = kPlanetStartTop;
+	_r4 = 0;
+	_duration = kTractorBeamTime - kTractorBeamScale;
+	_dropping = true;
+	setSegment(0, _duration);
+	setTime(0);
+	start();
+}
+
+void PlanetMover::newDestination() {
+	_p1 = _p4;
+	_r1 = _r4;
+
+	_p4 = kPlanetStopTop + ((PegasusEngine *)g_engine)->getRandomNumber(kPlanetStartTop - kPlanetStopTop - 1);
+	_r4 = ((PegasusEngine *)g_engine)->getRandomNumber(kMaxVelocity - 1);
+
+	if (_r4 + _p4 < kPlanetStopTop)
+		_r4 = kPlanetStopTop - _p4;
+
+	stop();
+	_duration = kRovingTime + ((PegasusEngine *)g_engine)->getRandomNumber(kRovingSlop - 1);
+	setSegment(0, _duration);
+	setTime(0);
+	start();
+}
+
+void PlanetMover::timeChanged(const TimeValue) {
+	if (_planetMovie) {
+		_planetMovie->moveElementTo(kPlanetStartLeft, hermite(_p1, _p4, _r1, _r4, _lastTime, _duration));
+		if (_lastTime == _duration) {
+			if (_dropping)
+				stop();
+			else
+				newDestination();
+		}
+	}
+}
+
+} // End of namespace Pegasus