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Diffstat (limited to 'engines/illusions/pathfinder.h')
-rw-r--r-- | engines/illusions/pathfinder.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/engines/illusions/pathfinder.h b/engines/illusions/pathfinder.h new file mode 100644 index 0000000000..ca402bb95d --- /dev/null +++ b/engines/illusions/pathfinder.h @@ -0,0 +1,67 @@ +/* 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 |