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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 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 ILLUSIONS_PATHFINDER_H
+#define ILLUSIONS_PATHFINDER_H
+
+#include "illusions/graphics.h"
+#include "common/array.h"
+#include "common/list.h"
+#include "common/rect.h"
+
+namespace Illusions {
+
+struct PathLine {
+ Common::Point p0, p1;
+};
+
+typedef Common::Array<PathLine> PathLines;
+typedef Common::Array<Common::Point> PointArray;
+
+class PathFinder {
+public:
+ PointArray *findPath(Common::Point sourcePt, Common::Point destPt,
+ PointArray *walkPoints, PathLines *walkRects, WidthHeight bgDimensions);
+protected:
+ PointArray *_walkPoints;
+ PathLines *_walkRects;
+ WidthHeight _bgDimensions;
+ byte *_pathBytes;
+ PointArray *findPathInternal(Common::Point sourcePt, Common::Point destPt);
+ bool isLineBlocked(PathLine &line);
+ int calcLineDistance(PathLine &line);
+ bool findClosestPt(Common::Point &sourcePt, Common::Point &closestPt, Common::Point &destPt);
+ bool findValidDestLine(Common::Point &destPt);
+ void findValidDestPt(Common::Point &destPt);
+ WidthHeight calcRectDimensions(PathLine &rect);
+ void adjustRectDimensions(WidthHeight &dimensions);
+ void swapDimensions(WidthHeight &dimensions);
+ void clipLineToBg(Common::Point &destPt, WidthHeight &rectDimensions, PathLine &outDestLine);
+ void findDeltaPt(Common::Point pt, Common::Point &outDeltaPt);
+ bool testRect(PathLine &line, PathLine &rect);
+ void swapLine(PathLine &line, PathLine &outLine);
+ int calcLineStatus(PathLine &sourceLine, PathLine &destRect, Common::Point *outPoint);
+};
+
+} // End of namespace Illusions
+
+#endif // ILLUSIONS_PATHFINDER_H