PEGASUS: Add the hermite code for the space chase

3 files changed, 118 insertions, 0 deletions

diff --git a/engines/pegasus/module.mk b/engines/pegasus/module.mk
index c4f0f5efe1..27ba5b29de 100644
--- a/engines/pegasus/module.mk
+++ b/engines/pegasus/module.mk
@@ -57,6 +57,7 @@ MODULE_OBJS = \
 	neighborhood/caldoria/caldoria4dsystem.o \
 	neighborhood/caldoria/caldoriamessages.o \
 	neighborhood/caldoria/caldoriamirror.o \
+	neighborhood/mars/hermite.o \
 	neighborhood/mars/mars.o \
 	neighborhood/mars/reactor.o \
 	neighborhood/mars/shuttleenergymeter.o \
diff --git a/engines/pegasus/neighborhood/mars/hermite.cpp b/engines/pegasus/neighborhood/mars/hermite.cpp
new file mode 100755
index 0000000000..814e92ff53
--- /dev/null
+++ b/engines/pegasus/neighborhood/mars/hermite.cpp
@@ -0,0 +1,76 @@
+/* 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/neighborhood/mars/hermite.h"
+
+namespace Pegasus {
+
+tCoordType hermite(tCoordType p1, tCoordType p4, tCoordType r1, tCoordType r4, int32 time, int32 duration) {	
+	float t = (float)time / duration;
+	float tsq = t * t;
+	float tcu = t * tsq;
+	float tcu2 = tcu + tcu;
+	float tsq2 = tsq + tsq;
+	float tsq3 = tsq2 + tsq;
+	return (tCoordType)((tcu2 - tsq3 + 1) * p1 + (tsq3 - tcu2) * p4 + (tcu - tsq2 + t) * r1 + (tcu - tsq) * r4);
+}
+
+tCoordType dHermite(tCoordType p1, tCoordType p4, tCoordType r1, tCoordType r4, int32 time, int32 duration) {	
+	float t = (float)time / duration;
+	float t2 = t + t;
+	float t4 = t2 + t2;
+	float t6 = t4 + t2;
+	float tsq = t * t;
+	float tsq3 = tsq + tsq + tsq;
+	float tsq6 = tsq3 + tsq3;
+	return (tCoordType)((tsq6 - t6) * p1 + (t6 - tsq6) * p4 + (tsq3 - t4 + 1) * r1 + (tsq3 - t2) * r4);
+}
+
+void hermite(Common::Point p1, Common::Point p4, Common::Point r1, Common::Point r4, int32 time, int32 duration, Common::Point &result) {	
+	float t = (float)time / duration;
+	float tsq = t * t;
+	float tcu = t * tsq;
+	float tcu2 = tcu + tcu;
+	float tsq2 = tsq + tsq;
+	float tsq3 = tsq2 + tsq;
+
+	result.x = (int16)((tcu2 - tsq3 + 1) * p1.x + (tsq3 - tcu2) * p4.x + (tcu - tsq2 + t) * r1.x + (tcu - tsq) * r4.x);
+	result.y = (int16)((tcu2 - tsq3 + 1) * p1.y + (tsq3 - tcu2) * p4.y + (tcu - tsq2 + t) * r1.y + (tcu - tsq) * r4.y);
+}
+
+void dHermite(Common::Point p1, Common::Point p4, Common::Point r1, Common::Point r4, int32 time, int32 duration, Common::Point &result) {	
+	float t = (float)time / duration;
+	float t2 = t + t;
+	float t4 = t2 + t2;
+	float t6 = t4 + t2;
+	float tsq = t * t;
+	float tsq3 = tsq + tsq + tsq;
+	float tsq6 = tsq3 + tsq3;
+
+	result.x = (int16)((tsq6 - t6) * p1.x + (t6 - tsq6) * p4.x + (tsq3 - t4 + 1) * r1.x + (tsq3 - t2) * r4.x);
+	result.y = (int16)((tsq6 - t6) * p1.y + (t6 - tsq6) * p4.y + (tsq3 - t4 + 1) * r1.y + (tsq3 - t2) * r4.y);
+}
+
+} // End of namespace Pegasus
diff --git a/engines/pegasus/neighborhood/mars/hermite.h b/engines/pegasus/neighborhood/mars/hermite.h
new file mode 100755
index 0000000000..de0122f84b
--- /dev/null
+++ b/engines/pegasus/neighborhood/mars/hermite.h
@@ -0,0 +1,41 @@
+/* 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_HERMITE_H
+#define PEGASUS_NEIGHBORHOOD_MARS_HERMITE_H
+
+#include "common/rect.h"
+#include "pegasus/types.h"
+
+namespace Pegasus {
+
+tCoordType hermite(tCoordType p1, tCoordType p4, tCoordType r1, tCoordType r4, int32 t, int32 duration);
+tCoordType dHermite(tCoordType p1, tCoordType p4, tCoordType r1, tCoordType r4, int32 t, int32 duration);
+void hermite(Common::Point p1, Common::Point p4, Common::Point r1, Common::Point r4, int32 t, int32 duration, Common::Point &result);
+void dHermite(Common::Point p1, Common::Point p4, Common::Point r1, Common::Point r4, int32 t, int32 duration, Common::Point &result);
+
+} // End of namespace Pegasus
+
+#endif