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Update map_coordinates.md

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Josh Freeman
2016-01-09 23:25:20 +00:00
parent b328901367
commit d0cc910523
1 changed files with 51 additions and 23 deletions
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research/map_coordinates.md
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@@ -28,42 +28,66 @@ private double ToMapCoordinate(double val) {
You can translate the `levels.exd` values to Long/Lat using the `x`, `y` and **scale** would be the maps [size_factor](https://github.com/viion/XIV-Datamining/blob/master/offsets/3.1_list.txt#L679)
```php
//
// Used due to spherical maps, world is round irl :P
//
function mapsRadiansToDegrees($rad)
{
return $rad / (pi() / 180);
}
function mapsTranslateXYZtoLatLong($x, $y, $scale = 100)
//
// This code will take the X, Y and map scale from the levels CSV and convert it into a LAT/LONG
// which can be used on leaflet or Google maps or just about any map tool
//
public function mapsTranslateXYZtoLatLong($x, $y, $scale = 100)
{
if ($x == 0 || $y == 0 || $scale == 0) {
return false;
}
$scale = $scale / 100;
$tilesize = 2048 / $scale;
$pixelsPerLonDegree = $tilesize / 360;
$pixelsPerLonRadian = $tilesize / (2 * pi());
$lng = $x / $pixelsPerLonDegree;
$latRadians = $y / -$pixelsPerLonRadian;
$lat = mapsRadiansToDegrees(2 * atan(exp($latRadians)) - pi() / 2);
return [
$lat = $this->mapsRadiansToDegrees(2 * atan(exp($latRadians)) - pi() / 2);
$coords = [
'x' => $lng,
'y' => $lat,
];
return $coords;
}
```
To translate a `levels.exd` position to an in-game X/Y:
```php
function mapsTranslateXYZToGame($x, $y, $scale, $tilescale = 50)
//
// This takes the X/Y, scale and tilescale from levels and converts it to
// and in-game X/Y position, I have not found tile scale in the files
// and it's never not been 50 (50px per tile), its not 100% accurate,
// tilescale is actually something like 49.951219... (2048/41)
//
public function mapsTranslateXYZToGame($x, $y, $scale, $tilescale = 50)
{
if ($x == 0 || $y == 0 || $scale == 0) {
return false;
}
$map = 2048 / ($scale / 100);
$TileCount = $map / $tilescale;
$x = ceil(round(($x / $tilescale) + ($TileCount / 2),1));
$y = ceil(round(($y / $tilescale) + ($TileCount / 2),1));
$tilecount = $map / $tilescale;
$x = ceil(round(($x / $tilescale) + ($tilecount / 2),1));
$y = ceil(round(($y / $tilescale) + ($tilecount / 2),1));
return [
'x' => $x,
'y' => $y,
@@ -74,16 +98,20 @@ function mapsTranslateXYZToGame($x, $y, $scale, $tilescale = 50)
And finally, to translate an in game X/Y to a `levels.exd` position which can then be converted to a 2D or Long/Lat:
```php
function mapsTranslateGameToXYZ($x, $y, $scale)
//
// Translates a X/Y from in-game to a levels output (which can then be translate dto lat/long
// this is quite accurate, not found it to be off at all. Requires map scale
//
public function mapsTranslateGameToXYZ($x, $y, $scale)
{
$scale = $scale / 100;
$x = ($x*50)-25-(1024 / $scale);
$y = ($y*50)-25-(1024 / $scale);
return [
'x' => $x,
'y' => $y,
];
$scale = $scale / 100;
$x = ($x*50)-25-(1024 / $scale);
$y = ($y*50)-25-(1024 / $scale);
return [
'x' => $x,
'y' => $y,
];
}
```