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engines/ultima/nuvie/pathfinder/party_path_finder.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 NUVIE_PATHFINDER_PARTY_PATH_FINDER_H
+#define NUVIE_PATHFINDER_PARTY_PATH_FINDER_H
+
+#include "ultima/nuvie/core/party.h"
+#include "ultima/nuvie/core/map.h"
+
+namespace Ultima {
+namespace Nuvie {
+
+/* PartyPathFinder moves the entire party at once.
+ * FIXME: Move to target if one square away and unblocked. Shamino isn't in the
+ * correct square after moving through a doorway.
+ * FIXME: Perhaps is_contiguous() should require everyone in front of a follower
+ * to also be contiguous. If more than one followers are lost, they stay
+ * together more than look for the leader.
+ * FIXME: When walking along the wall, the last follower doesn't move up when
+ * there is a closer free square. (it sometimes behaves the same way in U6)
+ * FIXME: If a higher-number follower is closer to the leader than a lower-numbered
+ * one, the one with higher priority bumps him out of the way, and he loses a
+ * move. This causes him to become non-contiguous. Followers should NEVER be
+ * moved to non-contiguous squares. Strangely, this only happens when moving in
+ * certain directions. (disable SEEK mode to check)
+ * FIXME: When changing directions, followers on opposite sides of the party
+ * (perpendicular to the forward direction) shouldn't exchange positions until
+ * the leader stops.
+ */
+
+#define AVOID_DAMAGE_TILES true
+
+class PartyPathFinder {
+	Party *party; // friend
+public:
+	PartyPathFinder(Party *p);
+	~PartyPathFinder();
+
+	bool follow_passA(uint32 p); // returns true if party member p moved
+	bool follow_passB(uint32 p);
+	void seek_leader(uint32 p);
+	void end_seek(uint32 p);
+
+	bool move_member(uint32 member_num, sint16 relx, sint16 rely, bool ignore_position = false, bool can_bump = true, bool avoid_danger_tiles = true);
+	bool bump_member(uint32 bumped_member_num, uint32 member_num);
+
+	bool is_seeking(uint32 member_num) {
+		return (get_member(member_num).actor->get_pathfinder() != 0);
+	}
+	bool is_contiguous(uint32 member_num, const MapCoord &from);
+	bool is_contiguous(uint32 member_num);
+	bool is_behind_target(uint32 member_num);
+	bool is_at_target(uint32 p);
+	void get_target_dir(uint32 p, sint8 &rel_x, sint8 &rel_y);
+	void get_forward_dir(sint8 &vec_x, sint8 &vec_y);
+	void get_last_move(sint8 &vec_x, sint8 &vec_y);
+
+protected:
+	bool try_moving_to_leader(uint32 p, bool ignore_position);
+	bool try_moving_forward(uint32 p);
+	bool try_moving_to_target(uint32 p, bool avoid_damage_tiles = false);
+	bool try_all_directions(uint32 p, MapCoord target_loc);
+	bool try_moving_sideways(uint32 p);
+
+	bool leader_moved_away(uint32 p);
+	bool leader_moved_diagonally();
+	bool leader_moved();
+
+	Std::vector<MapCoord> get_neighbor_tiles(const MapCoord &center, const MapCoord &target);
+
+	// use party
+	struct PartyMember get_member(uint32 p) {
+		return (party->member[p]);
+	}
+	sint8 get_leader() {
+		return (party->get_leader());
+	}
+};
+
+} // End of namespace Nuvie
+} // End of namespace Ultima
+
+#endif