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engines/vcruise/circuitpuzzle.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/>.
+ *
+ */
+
+#ifndef VCRUISE_CIRCUITPUZZLE_H
+#define VCRUISE_CIRCUITPUZZLE_H
+
+#include "common/array.h"
+#include "common/random.h"
+#include "common/rect.h"
+
+namespace Common {
+
+class RandomSource;
+
+} // End of namespace Common
+
+namespace VCruise {
+
+struct CircuitPuzzleAIEvaluator;
+class CircuitPuzzleVisitedSet;
+
+class CircuitPuzzle {
+public:
+	explicit CircuitPuzzle(int layout);
+
+	static const uint kBoardWidth = 6;
+	static const uint kBoardHeight = 5;
+
+	enum CellDirection {
+		kCellDirectionRight,
+		kCellDirectionDown,
+	};
+
+	enum Conclusion {
+		kConclusionNone,
+		kConclusionPlayerWon,
+		kConclusionPlayerLost,
+	};
+
+	struct CellRectSpec {
+		Common::Rect _rightLinkRect;
+		Common::Rect _downLinkRect;
+		Common::Rect _rightBarrierRect;
+		Common::Rect _downBarrierRect;
+	};
+
+	// Returns true if the AI can act, if it can then the actions are produced
+	bool executeAIAction(Common::RandomSource &randomSource, Common::Point &outCoord, CellDirection &outBlockDirection);
+
+	void addLink(const Common::Point &coord, CellDirection direction);
+
+	Conclusion checkConclusion() const;
+
+	const CellRectSpec *getCellRectSpec(const Common::Point &coord) const;
+	bool isCellDownLinkOpen(const Common::Point &coord) const;
+	bool isCellRightLinkOpen(const Common::Point &coord) const;
+
+private:
+	enum LinkState {
+		kLinkStateOpen,
+		kLinkStateConnected,
+		kLinkStateBlocked,
+	};
+
+	enum Direction {
+		kDirectionUp,
+		KDirectionDown,
+		kDirectionLeft,
+		kDirectionRight,
+
+		kDirectionCount,
+	};
+
+	struct CellState {
+		CellState();
+
+		LinkState _downLink;
+		LinkState _rightLink;
+	};
+
+	struct Action {
+		Action();
+
+		Common::Point _point;
+		CellDirection _direction;
+	};
+
+	static Common::Point getConnectedPoint(const Common::Point &coord, Direction direction);
+	LinkState *getConnectionState(const Common::Point &coord, Direction direction);
+	const LinkState *getConnectionState(const Common::Point &coord, Direction direction) const;
+	static bool isPositionValid(const Common::Point &coord);
+
+	void computeStepsToReach(CircuitPuzzleAIEvaluator &evaluator) const;
+	void floodFillLinks(Common::Point *pointsList, uint &listSize, CircuitPuzzleVisitedSet &visitedSet) const;
+
+	static void validateCoord(const Common::Point &coord);
+
+	CellState _cells[kBoardWidth][kBoardHeight];
+	CellRectSpec _cellRectSpecs[kBoardWidth][kBoardHeight];
+	Common::Point _startPoint;
+	Common::Point _goalPoint;
+
+	bool _havePreviousAction;
+	Action _previousAction;
+};
+
+} // End of namespace VCruise
+
+#endif