PEGASUS: Add the planet mover for the space chase

3 files changed, 164 insertions, 0 deletions

diff --git a/engines/pegasus/module.mk b/engines/pegasus/module.mk
index ae0552eb28..904bc1fe25 100644
--- a/engines/pegasus/module.mk
+++ b/engines/pegasus/module.mk
@@ -59,6 +59,7 @@ MODULE_OBJS = \
 	neighborhood/caldoria/caldoriamirror.o \
 	neighborhood/mars/hermite.o \
 	neighborhood/mars/mars.o \
+	neighborhood/mars/planetmover.o \
 	neighborhood/mars/reactor.o \
 	neighborhood/mars/shuttleenergymeter.o \
 	neighborhood/mars/spacechase3d.o \
diff --git a/engines/pegasus/neighborhood/mars/planetmover.cpp b/engines/pegasus/neighborhood/mars/planetmover.cpp
new file mode 100755
index 0000000000..368c295e76
--- /dev/null
+++ b/engines/pegasus/neighborhood/mars/planetmover.cpp
@@ -0,0 +1,106 @@
+/* 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/hermite.h"
+#include "pegasus/neighborhood/mars/mars.h"
+#include "pegasus/neighborhood/mars/planetmover.h"
+
+namespace Pegasus {
+
+const TimeScale kRovingScale = kTractorBeamScale;
+const TimeValue kRovingTime = kTenSeconds * kRovingScale;
+const TimeValue kRovingSlop = kTwoSeconds * kRovingScale;
+
+const tCoordType 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();
+	tCoordType currentLoc = hermite(_p1, _p4, _r1, _r4, _lastTime, _duration);
+	tCoordType 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;
+
+	// Slightly worked differently than the original to work into our random number stuff
+	uint diff = ABS(kPlanetStopTop - kPlanetStartTop);
+	_p4 = kPlanetStopTop + (diff != 0) ? ((PegasusEngine *)g_engine)->getRandomNumber(diff - 1) : 0;
+
+	_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
diff --git a/engines/pegasus/neighborhood/mars/planetmover.h b/engines/pegasus/neighborhood/mars/planetmover.h
new file mode 100755
index 0000000000..faf76cd9fa
--- /dev/null
+++ b/engines/pegasus/neighborhood/mars/planetmover.h
@@ -0,0 +1,57 @@
+/* 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.
+ *
+ */
+
+#ifndef PEGASUS_NEIGHBORHOOD_MARS_PLANETMOVER_H
+#define PEGASUS_NEIGHBORHOOD_MARS_PLANETMOVER_H
+
+#include "pegasus/timers.h"
+
+namespace Pegasus {
+
+class Movie;
+
+class PlanetMover : IdlerTimeBase {
+public:
+	PlanetMover();
+	virtual ~PlanetMover() {}
+
+	void startMoving(Movie *);
+	void stopMoving();
+
+	void dropPlanetOutOfSight();
+
+protected:
+	void newDestination();
+	virtual void timeChanged(const TimeValue);
+	
+	Movie *_planetMovie;
+	tCoordType _p1, _p4, _r1, _r4;
+	TimeValue _duration;
+	bool _dropping;
+};
+
+} // End of namespace Pegasus
+
+#endif