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engines/toon/path.h

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This file is dual-licensed.
+ * In addition to the GPLv3 license mentioned above, MojoTouch has
+ * exclusively licensed this code on March 23th, 2024, to be used in
+ * closed-source products.
+ * Therefore, any contributions (commits) to it will also be dual-licensed.
+ *
+ */
+
+#ifndef TOON_PATH_H
+#define TOON_PATH_H
+
+#include "common/array.h"
+#include "common/rect.h"
+
+#include "toon/toon.h"
+
+namespace Toon {
+
+// binary heap system for fast A*
+class PathFindingHeap {
+public:
+	PathFindingHeap();
+	~PathFindingHeap();
+
+	void push(int16 x, int16 y, uint16 weight);
+	void pop(int16 *x, int16 *y, uint16 *weight);
+	void init(int32 size);
+	void clear();
+	void unload();
+	uint32 getCount() { return _count; }
+
+private:
+	struct HeapDataGrid {
+		int16 _x, _y;
+		uint16 _weight;
+	};
+
+	HeapDataGrid *_data;
+
+	uint32 _size;
+	uint32 _count;
+};
+
+class PathFinding {
+public:
+	PathFinding();
+	~PathFinding();
+
+	void init(Picture *mask);
+
+	bool findPath(int16 x, int16 y, int16 destX, int16 destY);
+	bool findClosestWalkingPoint(int16 xx, int16 yy, int16 *fxx, int16 *fyy, int16 origX = -1, int16 origY = -1);
+	bool isWalkable(int16 x, int16 y);
+	bool isLikelyWalkable(int16 x, int16 y);
+	bool lineIsWalkable(int16 x, int16 y, int16 x2, int16 y2);
+	void walkLine(int16 x, int16 y, int16 x2, int16 y2);
+
+	void resetBlockingRects() { _numBlockingRects = 0; }
+	void addBlockingRect(int16 x1, int16 y1, int16 x2, int16 y2);
+	void addBlockingEllipse(int16 x1, int16 y1, int16 w, int16 h);
+
+	uint32 getPathNodeCount() const { return _tempPath.size(); }
+	int16 getPathNodeX(uint32 nodeId) const { return _tempPath[(_tempPath.size() - 1) - nodeId].x; }
+	int16 getPathNodeY(uint32 nodeId) const { return _tempPath[(_tempPath.size() - 1) - nodeId].y; }
+
+private:
+	static const uint8 kMaxBlockingRects = 16;
+
+	Picture *_currentMask;
+
+	PathFindingHeap *_heap;
+
+	uint16 *_sq;
+	int16 _width;
+	int16 _height;
+
+	Common::Array<Common::Point> _tempPath;
+
+	int16 _blockingRects[kMaxBlockingRects][5];
+	uint8 _numBlockingRects;
+};
+
+} // End of namespace Toon
+
+#endif