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/* |
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* This file is part of ArakneUtils. |
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* |
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* ArakneUtils is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser 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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* ArakneUtils 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 Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with ArakneUtils. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2017-2020 Vincent Quatrevieux |
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*/ |
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package fr.arakne.utils.maps.constant; |
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import java.util.Arrays; |
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import java.util.function.Function; |
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/** |
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* List of available directions |
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*/ |
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public enum Direction { |
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EAST(width -> 1), |
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SOUTH_EAST(width -> width), |
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SOUTH(width -> 2 * width - 1), |
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SOUTH_WEST(width -> width - 1), |
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WEST(width -> -1), |
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NORTH_WEST(width -> -width), |
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NORTH(width -> -(2 * width - 1)), |
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NORTH_EAST(width -> -(width - 1)); |
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/** |
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* Array of restricted directions (can be used on fight) |
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*/ |
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final static private Direction[] restricted = Arrays.stream(values()).filter(Direction::restricted).toArray(Direction[]::new); |
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/** |
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* Cache values |
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*/ |
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final static private Direction[] values = values(); |
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final private Function<Integer, Integer> computeNextCell; |
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/** |
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* @param computeNextCell The function for compute the next cell id following the direction |
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*/ |
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Direction(Function<Integer, Integer> computeNextCell) { |
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this.computeNextCell = computeNextCell; |
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} |
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/** |
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* Get the char value of the direction |
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* |
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* @return The direction char value |
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*/ |
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public char toChar(){ |
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return (char) (ordinal() + 'a'); |
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} |
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/** |
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* Get the opposite direction |
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* |
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* @return The direction |
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*/ |
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public Direction opposite(){ |
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return values[(ordinal() + 4) % 8]; |
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} |
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/** |
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* Get the orthogonal direction |
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* |
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* @return The direction |
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*/ |
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public Direction orthogonal() { |
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return values[(ordinal() + 2) % 8]; |
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} |
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/** |
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* Does the direction is restricted |
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* |
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* A restricted direction can be used in fight, or by monsters's sprites |
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* Restricted direction do not allow diagonal |
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* |
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* @return true if the direction can be used when restrictions are enabled |
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*/ |
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public boolean restricted() { |
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return ordinal() % 2 == 1; |
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} |
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/** |
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* Get the increment to apply to cell id for get the next cell on the direction |
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* |
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* Ex: |
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* MapCell current = map.get(123); |
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* MapCell east = map.get(Direction.EAST.nextCellIncrement(map.dimensions().width()) + current.id()); |
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* |
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* @param mapWidth The map width |
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* |
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* @return The next cell id increment |
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*/ |
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public int nextCellIncrement(int mapWidth) { |
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return computeNextCell.apply(mapWidth); |
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} |
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/** |
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* Get the direction by its char value |
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* |
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* @param c The direction character value |
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* @return The direction |
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*/ |
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static public Direction byChar(char c) { |
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return values[c - 'a']; |
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} |
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/** |
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* Get the restricted directions (i.e. can be used on fight) |
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* Note: a new array is always returned |
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* |
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* @return The array of Direction |
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*/ |
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static public Direction[] restrictedDirections() { |
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return restricted.clone(); |
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} |
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} |
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Arakne /
ArakneUtils
