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Improved MapProjection.Center handling

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Clemens 2022-03-06 17:28:27 +01:00
parent f52281ba85
commit 123a9916eb
5 changed files with 32 additions and 11 deletions
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16
MapControl/WPF/MapGraticule.WPF.cs
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@ -137,20 +137,30 @@ namespace MapControl
var latPoints = latSegments * interpolationCount;
var centerLon = Math.Round(ParentMap.Center.Longitude / lineDistance) * lineDistance;
var westLimit = centerLon - 180d;
var eastLimit = centerLon + 180d;
if (ParentMap.MapProjection.Type == MapProjectionType.TransverseCylindrical)
{
westLimit = ParentMap.MapProjection.Center.Longitude - 15d;
eastLimit = ParentMap.MapProjection.Center.Longitude + 15d;
westLimit = Math.Floor(westLimit / lineDistance) * lineDistance;
eastLimit = Math.Ceiling(eastLimit / lineDistance) * lineDistance;
}
var minLon = centerLon - lineDistance;
var maxLon = centerLon + lineDistance;
var lonRange = ParentMap.MapProjection.Type == MapProjectionType.TransverseCylindrical ? 15d : 180d;
if (DrawMeridian(path.Figures, centerLon, minLat, interpolationDistance, latPoints))
{
while (DrawMeridian(path.Figures, minLon, minLat, interpolationDistance, latPoints) &&
minLon > centerLon - lonRange)
minLon > westLimit)
{
minLon -= lineDistance;
}
while (DrawMeridian(path.Figures, maxLon, minLat, interpolationDistance, latPoints) &&
maxLon <= centerLon + lonRange)
maxLon < eastLimit)
{
maxLon += lineDistance;
}