060cb88 · unity8 · git.iko.soy

40

41 // geo coords conversion functions (adapted from libtimezonemap)

42 function radians(degrees) {

43− return degrees * Math.PI / 180;

43+ return degrees * Math.PI / 180;

44 }

45

46 function longitudeToX(longitude, map_width) {

47− var xdeg_offset = -6;

47+ const xdeg_offset = -6;

48− var x = (map_width * (180.0 + longitude) / 360.0) + (map_width * xdeg_offset / 180.0);

48+ const x = (map_width * (180.0 + longitude) / 360.0) + (map_width * xdeg_offset / 180.0);

49 return x;

50 }

51

52 function latitudeToY(latitude, map_height) {

53− var bottom_lat = -59;

53+ const bottom_lat = -59;

54− var top_lat = 81;

54+ const top_lat = 81;

55

56− var top_per = top_lat / 180.0;

56+ const top_per = top_lat / 180.0;

57 var y = 1.25 * Math.log(Math.tan(0.25*Math.PI + 0.4 * radians(latitude)));

58− var full_range = 4.6068250867599998;

58+ const full_range = 4.6068250867599998;

59− var top_offset = full_range * top_per;

59+ const top_offset = full_range * top_per;

60− var map_range = Math.abs(1.25 * Math.log(Math.tan(0.25*Math.PI + 0.4 * radians(bottom_lat))) - top_offset);

60+ const map_range = Math.abs(1.25 * Math.log(Math.tan(0.25*Math.PI + 0.4 * radians(bottom_lat))) - top_offset);

61 y = Math.abs(y - top_offset);

62 y = y / map_range;

63 y = y * map_height;