func latLon() (minC, maxC *gopnik.TileCoord) {
if *latMin != 0.0 && *lonMin != 0.0 && *latMax != 0.0 && *lonMax != 0.0 {
c1 := gproj.FromLLToCoord(*latMin, *lonMin, *zoom)
c2 := gproj.FromLLToCoord(*latMax, *lonMax, *zoom)
maxC = &c1
minC = &c2
if maxC.X < minC.X {
maxC.X, minC.X = minC.X, maxC.X
}
if maxC.Y < minC.Y {
maxC.Y, minC.Y = minC.Y, maxC.Y
}
}
return
}
func genCoords(bbox [4]float64, zoom uint64) (res []gopnik.TileCoord, err error) {
minC := gproj.FromLLToCoord(bbox[0], bbox[2], zoom)
maxC := gproj.FromLLToCoord(bbox[1], bbox[3], zoom)
metaSize := app.App.Metatiler().MetaSize(zoom)
mask := metaSize - 1
minX, maxX := minMaxUint64(minC.X & ^mask, maxC.X & ^mask)
minY, maxY := minMaxUint64(minC.Y & ^mask, maxC.Y & ^mask)
for x := minX; x <= maxX; x += metaSize {
for y := minY; y <= maxY; y += metaSize {
res = append(res, gopnik.TileCoord{
X: x,
Y: y,
Zoom: zoom,
Size: metaSize,
})
}
}
return
}
func convertCoordByZoom(coord gopnik.TileCoord, zoom uint64) gopnik.TileCoord {
lat, lon, _ := gproj.FromCoordToLL(coord)
return gproj.FromLLToCoord(lat, lon, zoom)
}