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Geo3x3 Vim9
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vim9script | |
def g:Geo3x3_encode(lat: float, lng: float, level: number): string | |
var flng = lng | |
var res = "" | |
if flng >= 0.0 | |
res = "E" | |
else | |
res = "W" | |
flng += 180.0 | |
endif | |
var flat = lat + 90.0 | |
var unit = 180.0 | |
for i in range(1, level - 1) | |
unit /= 3 | |
var x = float2nr(flng / unit) | |
var y = float2nr(flat / unit) | |
var n = x + y * 3 + 1 | |
res = res .. n | |
flng -= x * unit | |
flat -= y * unit | |
endfor | |
return res | |
enddef | |
def g:Geo3x3_decode(code: string): list<any> | |
var fcode = code | |
var clen = strlen(code) | |
if clen > 0 | |
var flg = code[0] == "W" | |
var unit = 180.0 | |
var lat = 0.0 | |
var lng = 0.0 | |
var level = 1 | |
for i in range(1, clen) | |
var n = str2nr(code[i]) | |
if n == 0 | |
break | |
endif | |
unit /= 3 | |
n -= 1 | |
lng += float2nr(n % 3) * unit | |
lat += float2nr(n / 3) * unit | |
level += 1 | |
endfor | |
if flg | |
lng -= 180.0 | |
endif | |
lat += unit / 2 | |
lng += unit / 2 | |
lat -= 90 | |
return [lat, lng, level, unit] | |
endif | |
return [] | |
enddef |
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