forked from La_Bureautique/zeg1jeux
43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
const TAILLE_SPRITE = 32;
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var places = document.getElementsByClassName('place');
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var map = document.getElementById('map');
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var origLat = map.getAttribute('data-orig-lat');
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var origLon = map.getAttribute('data-orig-lon');
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var radius = map.getAttribute('data-radius');
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function computeLatDistanceInKm (dest, orig) {
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// Approximation française
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return ((dest - orig) * 111);
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}
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function computeLonDistanceInKm (dest, orig) {
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// Approximation française
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return ((dest - orig) * 79);
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}
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// Position places on map
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for (place of places) {
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var placeLat = place.getAttribute("data-place-lat");
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var placeLon = place.getAttribute("data-place-lon");
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var latDistanceKm = computeLatDistanceInKm(placeLat, origLat);
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var lonDistanceKm = computeLonDistanceInKm(placeLon, origLon);
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var latDistancePcts = latDistanceKm / (2 * radius) * 100;
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var lonDistancePcts = lonDistanceKm / (2 * radius) * 100;
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var leftPcts = 50 + lonDistancePcts;
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var topPcts = 50 - latDistancePcts;
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var cssLeft = 'calc(' + leftPcts + '% - ' + (TAILLE_SPRITE / 2) + 'px)';
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var cssTop = 'calc(' + topPcts + '% - ' + (TAILLE_SPRITE / 2) + 'px)';
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place.style.left = cssLeft;
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place.style.top = cssTop;
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}
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