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307 lines
10 KiB
307 lines
10 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle 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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// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
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defined('MOODLE_INTERNAL') || die();
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// This file creates a board for "Snakes and Ladders".
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function game_createsnakesboard($imageasstring, $colsx, $colsy, $ofstop, $ofsbottom,
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$ofsright, $ofsleft, $board, $setwidth, $setheight) {
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global $CFG;
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$dir = $CFG->dirroot.'/mod/game/snakes/1';
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$im = imagecreatefromstring($imageasstring);
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// Check if need resize.
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if ( $setwidth > 0 or $setheight > 0) {
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$source = $im;
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$width = imagesx($source);
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$height = imagesy($source);
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$factorx = $setwidth / $width;
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$factory = $setheight / $height;
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$factor = ($factorx < $factory || $factory == 0 ? $factorx : $factory);
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$newwidth = $width * $factor;
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$newheight = $height * $factor;
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$im = imagecreatetruecolor($newwidth, $newheight);
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imagecopyresized($im, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
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}
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$cx = imagesx($im) - $ofsright - $ofsleft;
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$cy = imagesy($im) - $ofstop - $ofsbottom;
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$color = 0xFF0000;
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for ($i = 0; $i <= $colsx; $i++) {
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imageline( $im, $ofsleft + $i * $cx / $colsx, $ofstop, $ofsleft + $i * $cx / $colsx, $cy + $ofstop, $color);
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}
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for ($i = 0; $i <= $colsy; $i++) {
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imageline( $im, $ofsleft, $ofstop + $i * $cy / $colsy, $cx + $ofsleft, $ofstop + $i * $cy / $colsy, $color);
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}
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$filenamenumbers = $dir.'/numbers.png';
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$imgnumbers = imagecreatefrompng( $filenamenumbers);
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$sizenumbers = getimagesize ($filenamenumbers);
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for ($iy = 0; $iy < $colsy; $iy++) {
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if ($iy % 2 == 0) {
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$inc = false;
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$num = ($colsy - $iy) * $colsy;
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} else {
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$inc = true;
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$num = ($colsy - $iy) * $colsy - ($colsy - 1);
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}
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$ypos = $iy * $cy / $colsy + $ofstop;
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for ($ix = 0; $ix < $colsx; $ix++) {
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$xpos = $ix * $cx / $colsx + $ofsleft;
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shownumber( $im, $imgnumbers, $num, $xpos, $ypos, $cx / 4, $cy / 4, $sizenumbers);
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$num = ($inc ? $num + 1 : $num - 1);
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}
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}
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makeboard( $im, $dir, $cx, $cy, $board, $colsx, $colsy, $ofsleft, $ofstop);
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return $im;
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}
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function computexy( $pos, &$x, &$y, $colsx, $colsy) {
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$x = ($pos - 1) % $colsx;
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$y = ($colsy - 1) - floor( ($pos - 1) / $colsy);
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if ($y % 2 == 0) {
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$x = ($colsx - 1) - $x;
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}
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}
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function makeboard( $im, $dir, $cx, $cy, $board, $colsx, $colsy, $ofsleft, $ofstop) {
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$a = explode( ',', $board);
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foreach ($a as $s) {
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if (substr( $s, 0, 1) == 'L') {
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makeboardL( $im, $dir, $cx, $cy, substr( $s, 1), $colsx, $colsy, $ofsleft, $ofstop);
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} else {
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makeboardS( $im, $dir, $cx, $cy, substr( $s, 1), $colsx, $colsy, $ofsleft, $ofstop);
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}
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}
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}
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function makeboardl( $im, $dir, $cx, $cy, $s, $colsx, $colsy, $ofsleft, $ofstop) {
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$pos = strpos( $s, '-');
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$from = substr( $s, 0, $pos);
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$to = substr( $s, $pos + 1);
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computexy( $from, $startx, $starty, $colsx, $colsy);
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computexy( $to, $x2, $y2, $colsx, $colsy);
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if (($x2 < $startx) and ($y2 < $starty)) {
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$temp = $x2; $x2 = $startx; $startx = $temp;
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$temp = $y2; $y2 = $starty; $starty = $temp;
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}
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$movex = $x2 - $startx;
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$movey = $y2 - $starty;
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$letter = ( $movex * $movey < 0 ? 'b' : 'a');
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$oldstartx = $startx; $oldmovex = $movex; $oldstarty = $starty; $oldmovey = $movey;
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if ($movex < 0) {
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$startx += $movex;
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$movex = -$movex;
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}
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if ($movey < 0) {
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$starty += $movey;
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$movey = -$movey;
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}
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$stamp = 0;
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if ($letter == 'b') {
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$file = $dir.'/l'.$letter.$movey.$movex.'.png';
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if (file_exists( $file)) {
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$stamp = game_imagecreatefrompng( $file);
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} else {
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$file = $dir.'/la'.$movey.$movex.'.png';
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$source = game_imagecreatefrompng( $file);
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if ( $source != 0) {
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$stamp = imagerotate($source, 90, 0);
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}
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}
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} else {
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$file = $dir.'/la'.$movex.$movey.'.png';
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$stamp = game_imagecreatefrompng( $file);
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}
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$dstx = $startx * $cx / $colsx;
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$dsty = $starty * $cy / $colsy;
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$dstw = ($movex + 1) * $cx / $colsx;
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$dsth = ($movey + 1) * $cy / $colsy;
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if ($stamp == 0) {
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game_printladder( $im, $file, $dstx + $ofsleft, $dsty + $ofstop, $dstw, $dsth, $cx / $colsx, $cy / $colsy);
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} else {
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imagecopyresampled( $im, $stamp, $ofsleft + $dstx, $ofstop + $dsty, 0, 0, $dstw, $dsth,
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100 * $movex + 100, 100 * $movey + 100);
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}
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}
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function makeboards( $im, $dir, $cx, $cy, $s, $colsx, $colsy, $ofsleft, $ofstop) {
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$pos = strpos( $s, '-');
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$from = substr( $s, 0, $pos);
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$to = substr( $s, $pos + 1);
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computexy( $from, $startx, $starty, $colsx, $colsy);
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computexy( $to, $x2, $y2, $colsx, $colsy);
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$swap = 0;
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if (($x2 < $startx) and ($y2 < $starty)) {
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$temp = $x2; $x2 = $startx; $startx = $temp;
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$temp = $y2; $y2 = $starty; $starty = $temp;
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$swap = 1;
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}
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$movex = $x2 - $startx;
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$movey = $y2 - $starty;
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/* a*d
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*
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* b*c
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*/
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$stamp = $rotate = 0;
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if ($movex >= 0 and $movey < 0) {
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$letter = 'b';
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$file = $dir.'/sa'.$movey.$movex.'.png';
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$source = game_imagecreatefrompng( $file);
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if ($source != 0) {
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$stamp = imagerotate($source, 270, 0);
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$starty += $movey; $movey = -$movey;
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} else {
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$rotate = 270;
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}
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} else if ($movex < 0 and $movey < 0) {
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$letter = 'c';
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$file = $dir.'/sa'.$movey.$movex.'.png';
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$source = game_imagecreatefrompng( $file);
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if ($source != 0) {
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$stamp = imagerotate($source, 180, 0);
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$startx += $movex; $movex = -$movex;
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$starty += $movey; $movey = -$movey;
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} else {
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$rotate = 180;
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}
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} else if (($movex < 0) and ($movey >= 0)) {
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$letter = 'd';
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$file = $dir.'/sa'.$movey.$movex.'.png';
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$source = game_imagecreatefrompng( $file);
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if ($source != 0) {
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$stamp = imagerotate($source, 270, 0);
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$startx += $movex; $movex = -$movex;
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} else {
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$rotate = 270;
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}
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} else {
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$file = $dir.'/sa'.$movex.$movey.'.png';
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$stamp = game_imagecreatefrompng( $file);
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}
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if (($swap != 0) and ($stamp == 0)) {
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$temp = $x2; $x2 = $startx; $startx = $temp;
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$temp = $y2; $y2 = $starty; $starty = $temp;
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$movex = $x2 - $startx;
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$movey = $y2 - $starty;
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}
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$dstx = $startx * $cx / $colsx;
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$dsty = $starty * $cy / $colsy;
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$dstw = ($movex + 1) * $cx / $colsx;
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$dsth = ($movey + 1) * $cy / $colsy;
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if ($stamp == 0) {
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game_printsnake( $im, $file, $dstx + $ofsleft, $dsty + $ofstop, $dstw, $dsth, $cx / $colsx, $cy / $colsy);
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} else {
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imagecopyresampled( $im, $stamp, $dstx + $ofsleft, $dsty + $ofstop, 0, 0, $dstw, $dsth,
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100 * $movex + 100, 100 * $movey + 100);
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}
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}
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function game_imagecreatefrompng( $file) {
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if (file_exists( $file)) {
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return imagecreatefrompng( $file);
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}
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return 0;
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}
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function shownumber( $imghandle, $imgnumbers, $number, $x1 , $y1, $width, $height, $sizenumbers) {
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if ($number < 10) {
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$widthnumber = $sizenumbers[ 0] / 10;
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$dstx = $x1 + $width / 10;
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$dsty = $y1 + $height / 10;
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$srcx = $number * $sizenumbers[ 0] / 10;
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$srcw = $sizenumbers[ 0] / 10;
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$srch = $sizenumbers[ 1];
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$dstw = $width / 10;
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$dsth = $dstw * $srch / $srcw;
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imagecopyresampled( $imghandle, $imgnumbers, $dstx, $dsty, $srcx, 0, $dstw, $dsth, $srcw, $srch);
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} else {
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$number1 = floor( $number / 10);
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$number2 = $number % 10;
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shownumber( $imghandle, $imgnumbers, $number1, $x1 - $width / 20, $y1, $width, $height, $sizenumbers);
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shownumber( $imghandle, $imgnumbers, $number2, $x1 + $width / 20, $y1, $width, $height, $sizenumbers);
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}
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}
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function returnrotatedpoint($x, $y, $cx, $cy, $a) {
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// Radius using distance formula.
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$r = sqrt(pow(($x - $cx), 2) + pow(($y - $cy), 2));
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// Initial angle in relation to center.
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$ia = rad2deg(atan2(($y - $cy), ($x - $cx)));
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$nx = $r * cos(deg2rad($a + $ia));
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$ny = $r * sin(deg2rad($a + $ia));
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return array("x" => $cx + $nx, "y" => $cy + $ny);
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}
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function game_printladder( $im, $file, $x, $y, $width, $height, $cellx, $celly) {
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$color = imagecolorallocate($im, 0, 0, 255);
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$x2 = $x + $width - $cellx / 2;
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$y2 = $y + $height - $celly / 2;
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$x1 = $x + $cellx / 2;
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$y1 = $y + $celly / 2;
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imageline( $im, $x1, $y1, $x2, $y2, $color);
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$r = sqrt(pow(($x2 - $x1), 2) + pow(($y2 - $y1), 2));
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$mul = 100 / $r;
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$x1 = $x2 - ($x2 - $x1) * $mul;
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$y1 = $y2 - ($y2 - $y1) * $mul;
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$a = returnRotatedPoint( $x1, $y1, $x2, $y2, 20);
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imageline( $im, $x2, $y2, $a[ 'x'], $a[ 'y'], $color);
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$a = returnRotatedPoint( $x1, $y1, $x2, $y2, -20);
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imageline( $im, $x2, $y2, $a[ 'x'], $a[ 'y'], $color);
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}
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function game_printsnake( $im, $file, $x, $y, $width, $height, $cellx, $celly) {
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$color = imagecolorallocate($im, 0, 255, 0);
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$x2 = $x + $width - $cellx / 2;
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$y2 = $y + $height - $celly / 2;
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$x1 = $x + $cellx / 2;
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$y1 = $y + $celly / 2;
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imageline( $im, $x1, $y1, $x2, $y2, $color);
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$r = sqrt(pow(($x2 - $x1), 2) + pow(($y2 - $y1), 2));
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$mul = 100 / $r;
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$x2 = $x1 + ($x2 - $x1) * $mul;
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$y2 = $y1 + ($y2 - $y1) * $mul;
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$a = returnRotatedPoint( $x1, $y1, $x2, $y2, 80);
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imageline( $im, $x1, $y1, $a[ 'x'], $a[ 'y'], $color);
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$a = returnRotatedPoint( $x1, $y1, $x2, $y2, -80);
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imageline( $im, $x1, $y1, $a[ 'x'], $a[ 'y'], $color);
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}
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