private static void CutAndAssignToFootprintParts(
[NotNull] GeometryPart multipatchPart,
[NotNull] IPolyline cutLine,
[NotNull] IDictionary <RingGroup, List <RingGroup> > splitPartsByFootprintPart,
ChangeAlongZSource zSource)
{
double tolerance = GeometryUtils.GetXyTolerance(multipatchPart.FirstGeometry);
double zTolerance = GeometryUtils.GetZTolerance(multipatchPart.FirstGeometry);
RingGroup ringGroup = GeometryConversionUtils.CreateRingGroup(multipatchPart);
int pointId;
if (GeometryUtils.HasUniqueVertexId(
Assert.NotNull(multipatchPart.MainOuterRing), out pointId))
{
ringGroup.Id = pointId;
}
bool inverted = ringGroup.ClockwiseOriented == false;
if (inverted)
{
ringGroup.ReverseOrientation();
}
IList <RingGroup> cutRingGroups =
CutRingGroupPlanar(ringGroup, cutLine, tolerance, zSource, zTolerance);
AssignResultsToFootprintParts(cutRingGroups, splitPartsByFootprintPart,
tolerance);
if (inverted)
{
foreach (RingGroup cutRingGroup in cutRingGroups)
{
cutRingGroup.ReverseOrientation();
}
}
}
public void CanReadClockwiseWindingPolygon()
{
// Some OGC 1.1 implementations do not have counter-clockwise polygon winding order:
var ring1 = new List <Pnt3D>
{
new Pnt3D(0, 0, 9),
new Pnt3D(0, 100, 8),
new Pnt3D(100, 100, 5),
new Pnt3D(100, 20, 9)
};
RingGroup polygon = CreatePoly(ring1);
polygon.AddInteriorRing(new Linestring(new[]
{
new Pnt3D(25, 50, 0),
new Pnt3D(50, 50, 0),
new Pnt3D(50, 75, 0),
new Pnt3D(25, 75, 0),
new Pnt3D(25, 50, 0)
}
));
RingGroup inverted = (RingGroup)polygon.Clone();
inverted.ReverseOrientation();
WkbGeomWriter writer = new WkbGeomWriter();
byte[] bytes = writer.WritePolygon(inverted);
const bool assumeWkbPolygonsClockwise = true;
WkbGeomReader reader = new WkbGeomReader(assumeWkbPolygonsClockwise);
RingGroup deserialized = reader.ReadPolygon(new MemoryStream(bytes));
Assert.IsTrue(deserialized.Equals(polygon));
}
