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engines/ultima/nuvie/pathfinder/path_finder.cpp

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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/>.
+ *
+ */
+
+#include "ultima/nuvie/pathfinder/path.h"
+#include "ultima/nuvie/pathfinder/path_finder.h"
+
+namespace Ultima {
+namespace Nuvie {
+
+PathFinder::PathFinder() : start(0, 0, 0), goal(0, 0, 0), loc(0, 0, 0), search(0) {
+
+}
+
+PathFinder::PathFinder(const MapCoord &s, const MapCoord &g)
+	: start(s), goal(g), loc(0, 0, 0), search(0) {
+
+}
+
+PathFinder::~PathFinder() {
+	delete search;
+}
+
+bool PathFinder::check_dir(const MapCoord &from, MapCoord &rel, sint8) {
+	return check_loc(MapCoord(from.x + rel.sx, from.y + rel.sy, from.z));
+}
+
+bool PathFinder::check_loc(uint16 x, uint16 y, uint8 z) {
+	return check_loc(MapCoord(x, y, z));
+}
+
+void PathFinder::new_search(Path *new_path) {
+	delete search;
+	search = new_path;
+	search->set_pathfinder(this);
+}
+
+bool PathFinder::find_path() {
+	if (search) {
+		if (search->have_path())
+			search->delete_path();
+		return (search->path_search(loc, goal));
+	}
+	return false; // no path-search object
+}
+
+bool PathFinder::have_path() {
+	return (search && search->have_path());
+}
+
+void PathFinder::set_goal(const MapCoord &g) {
+	goal = g;
+	if (have_path())
+		search->delete_path();
+}
+
+void PathFinder::set_start(const MapCoord &s) {
+	start = s;
+	if (have_path())
+		search->delete_path();
+}
+
+bool PathFinder::is_path_clear() {
+	uint32 num_steps = search->get_num_steps();
+	for (unsigned int n = 0; n < num_steps; n++) {
+		const MapCoord &pos = search->get_step(n);
+		if (!check_loc(pos))
+			return false;
+	}
+	return true;
+}
+
+} // End of namespace Nuvie
+} // End of namespace Ultima