mirror of
https://github.com/Azgaar/Fantasy-Map-Generator.git
synced 2025-12-16 17:31:24 +01:00
263c2d6a3c
* added geographic data to burgs CSV export * fixed projection problems in export added cell -> geojson export added a QGIS example style * adding routes data * adding river data * added PHP script to add random details to cells.
81 lines
2.6 KiB
PHP
81 lines
2.6 KiB
PHP
<?php
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$max_deviation = 0.2;
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$max_abs = 0.02;
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$min_distance = 0.1;
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$iterations = 4;
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if ($argc < 2 ) {
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exit( "Usage: add_random_points.php <filename.json>\n" );
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}
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// FIXME: This script created a few cases of self-intersection that must be fixed manually
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// in QGIS: Vector -> Geometry Tools -> Check Validity
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$cells = json_decode(file_get_contents($argv[1]), true);
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for ($i=0; $i<$iterations; $i++) {
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$lookup = array();
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foreach ($cells['features'] as &$cell) {
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$points = $cell['geometry']['coordinates'][0];
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$prev = null;
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$newpoints = array();
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foreach ($points as $point) {
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if ($prev) {
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$distance = sqrt(pow($prev[0] - $point[0], 2) + pow($prev[1] - $point[1], 2));
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if ($distance == 0) continue;
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if ($distance > $min_distance) {
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$id_a = $prev[0]."-".$prev[1];
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$id_b = $point[0]."-".$point[1];
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if (isset($lookup[$id_a."--".$id_b])) {
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$newpoints[] = $lookup[$id_a."--".$id_b];
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} elseif (isset($lookup[$id_b."--".$id_a])) {
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$newpoints[] = $lookup[$id_b."--".$id_a];
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} else {
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$x = ($prev[0]+$point[0])/2.0;
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$y = ($prev[1]+$point[1])/2.0;
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$r = mt_rand() / mt_getrandmax(); // 0-1
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$r = ($r+1) / 2; // 0.5 - 1.0
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// if we define dx=x2-x1 and dy=y2-y1, then the normals are (-dy, dx) and (dy, -dx).
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$dx = $point[0] - $x;
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$dy = $point[1] - $y;
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if (mt_rand() / mt_getrandmax() < 0.5) {
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$x_off = -$dy;
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$y_off = $dx;
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} else {
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$x_off = $dy;
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$y_off = -$dx;
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}
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$x_off *= $r * $max_deviation;
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$x_off = max(min($x_off, $max_abs), $max_abs*-1);
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$y_off *= $r * $max_deviation;
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$y_off = max(min($y_off, $max_abs), $max_abs*-1);
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$p = array($x + $x_off, $y + $y_off);
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$lookup[$id_a."--".$id_b] = $p;
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$newpoints[] = $p;
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}
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}
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}
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$newpoints[] = $point;
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$prev = $point;
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}
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$cell['geometry']['coordinates'][0] = $newpoints;
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}
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}
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echo json_encode($cells, JSON_PRETTY_PRINT);
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?>
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