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<?php |
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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 2 of the License, or // |
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// (at your option) any later version. // |
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// // |
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// You may not change or alter any portion of this comment or credits // |
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// of supporting developers from this source code or any supporting // |
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// source code which is considered copyrighted (c) material of the // |
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// original comment or credit authors. // |
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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, write to the Free Software // |
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // |
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// ------------------------------------------------------------------------ // |
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/** |
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* Ratings functions specific to Linear rating system. |
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* |
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* @package chess |
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* @subpackage ratings |
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*/ |
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/** |
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* Update the players' ratings for an individual game, using the Linear rating system. |
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* |
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* @param int $white_rating White's current rating |
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* @param int $white_games Number of rated games that white has played |
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* @param int $black_rating Black's current rating |
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* @param int $black_games Number of rated games that black has played |
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* @param string $pgn_result Game result: '1-0' (white won), '0-1' (black won) or '1/2-1/2' (draw) |
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* @return array Array with two elements: |
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* - $white_rating_new - white's new rating |
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* - $black_rating_new - black's new rating |
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*/ |
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function chess_ratings_adj_linear($white_rating, $white_games, $black_rating, $black_games, $pgn_result) |
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{ |
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// compute score: +1 for win, 0 for draw, -1 for loss |
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switch ($pgn_result) { |
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case '1-0': |
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$S = 1; |
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break; |
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case '1/2-1/2': |
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default: // should not occur |
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$S = 0; |
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break; |
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case '0-1': |
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$S = -1; |
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break; |
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} |
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return [$white_rating + $S * 10, $black_rating - $S * 10]; |
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} |
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/** |
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* Get the number of provisional games used in the Linear rating system. |
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* |
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* @return int Number of provisional games |
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*/ |
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function chess_ratings_num_provisional_games_linear() |
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{ |
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return 2; |
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} |
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?> |
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mambax7 /
chess
mambax7
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.