本文整理汇总了C++中TileIndex::appendLatLonIndex方法的典型用法代码示例。如果您正苦于以下问题：C++ TileIndex::appendLatLonIndex方法的具体用法？C++ TileIndex::appendLatLonIndex怎么用？C++ TileIndex::appendLatLonIndex使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TileIndex的用法示例。
在下文中一共展示了TileIndex::appendLatLonIndex方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: fromCoordinates
TileIndex TileIndex::fromCoordinates(const GeoIface::GeoCoordinates& coordinate, const int getLevel)
{
GEOIFACE_ASSERT(getLevel<=MaxLevel);
if (!coordinate.hasCoordinates())
return TileIndex();
qreal tileLatBL = -90.0;
qreal tileLonBL = -180.0;
qreal tileLatHeight = 180.0;
qreal tileLonWidth = 360.0;
TileIndex resultIndex;
for (int l = 0; l <= getLevel; ++l)
{
// how many tiles at this level?
const qreal latDivisor = TileIndex::Tiling;
const qreal lonDivisor = TileIndex::Tiling;
const qreal dLat = tileLatHeight / latDivisor;
const qreal dLon = tileLonWidth / lonDivisor;
int latIndex = int( (coordinate.lat() - tileLatBL ) / dLat );
int lonIndex = int( (coordinate.lon() - tileLonBL ) / dLon );
// protect against invalid indices due to rounding errors
bool haveRoundingErrors = false;
if (latIndex < 0)
{
haveRoundingErrors = true;
latIndex = 0;
}
if (lonIndex < 0)
{
haveRoundingErrors = true;
lonIndex = 0;
}
if (latIndex >= latDivisor)
{
haveRoundingErrors = true;
latIndex = latDivisor-1;
}
if (lonIndex >= lonDivisor)
{
haveRoundingErrors = true;
lonIndex = lonDivisor-1;
}
if (haveRoundingErrors)
{
// qCDebug(DIGIKAM_GEOIFACE_LOG) << QString::fromLatin1("Rounding errors at level %1!").arg(l);
}
resultIndex.appendLatLonIndex(latIndex, lonIndex);
// update the start position for the next tile:
// TODO: rounding errors
tileLatBL += latIndex*dLat;
tileLonBL += lonIndex*dLon;
tileLatHeight /= latDivisor;
tileLonWidth /= lonDivisor;
}
return resultIndex;
}