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71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qdengine/qd_fwd.h"
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#include "qdengine/xmath.h"
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#include "qdengine/qdcore/qd_camera.h"
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#include "qdengine/qdcore/qd_game_object_moving.h"
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#include "qdengine/qdcore/util/AIAStar_API.h"
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namespace QDEngine {
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qdHeuristic::qdHeuristic() : _camera_ptr(NULL), _object_ptr(NULL) {
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}
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qdHeuristic::~qdHeuristic() {
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}
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int qdHeuristic::getH(int x, int y) {
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x -= _target.x;
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y -= _target.y;
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//return sqrt(static_cast<float>(x * x + y * y));
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// Достаточно будет эвристики без квадратного корня, который медленный
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return static_cast<float>(x * x + y * y);
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}
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int qdHeuristic::getG(int x1, int y1, int x2, int y2) {
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if (!_object_ptr->is_walkable(Vect2s(x2, y2)))
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return 10000;
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// Для диагональных перемещений смотрим еще и перемещения по катетам,
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// потому как туда может попасть персонаж из-за погрешностей интерполирования позиции
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if ((x1 != x2) && (y1 != y2) &&
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(
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!_object_ptr->is_walkable(Vect2s(x1, y2)) ||
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!_object_ptr->is_walkable(Vect2s(x2, y1))
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))
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return 10000;
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//return abs(x2 - x1) + abs(y2 - y1);
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// 14 - приближение корня из 2, умноженного на 10. 10 - единица*10.
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if ((x1 != x2) && (y1 != y2))
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return 14;
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else return 10;
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}
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void qdHeuristic::init(const Vect3f trg) {
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_target_f = trg;
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_target = _camera_ptr->get_cell_index(trg.x, trg.y);
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}
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} // namespace QDEngine
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