/// <summary>
/// Loads XYZ and SvBR profile from file at SV position.
/// Multiple reloads of SvBR data might be possible to adjust off indexing based on malformed data.
/// </summary>
/// <param name="handle">File handles for XYZ and SvBR data.</param>
/// <param name="sv">Sv position to load data at.</param>
/// <param name="svRange">SvRange of patch (needed to calculate index).</param>
/// <returns>XYZ/SvBR profile</returns>
private Pair <IEnumerable <V3d> > LookUpProfile(Pair <PatchFileHandle> handle, double sv, Range1d svRange)
{
// sv to array index
var index =
handle.E0.PatchTree.Info.QuadVertexSortOrder == PatchFileInfo.QuadVertexSortOrderType.RowMajor ?
SvToArrayIndex(sv, svRange, handle.E0.FileLoader.NumOfRows) :
SvToArrayIndex(sv, svRange, handle.E0.FileLoader.NumOfColumns);
// Load SvBR data. If indexing was not exact keep reloading neighboring profiles
var pntsSvbr = new V3d[0];
var localSv = sv - handle.E1.PatchTree.Info.Local2Global2d.M03;
int increment = 0;
do
{
// Load data
pntsSvbr = LookUpProfile(handle.E1, index);
// For some reason we couldn't load any more data.....
if (pntsSvbr == null || pntsSvbr.IsEmpty())
{
break;
}
// NaN line, try next one
if (pntsSvbr.Where(p => !p.IsNaN).IsEmptyOrNull())
{
if (increment == 0)
{
break;
}
else
{
index += increment;
continue;
}
}
var avgSv = pntsSvbr.Where(p => !p.IsNaN).Average(p => p.X);
// Profile close enough?
if (avgSv.ApproximateEquals(localSv, AvgGeomtrySize / 2))
{
break;
}
else
{ // nope, indexing must be off, try next one
if (increment == 0)
{
increment = (avgSv < localSv) ? 1 : -1;
}
// if increment flips, than me might have a bigger hole between lines than AvgGeoSize
else if (increment != ((avgSv < localSv) ? 1 : -1))
{
break;
}
index += increment;
}
} while (!pntsSvbr.IsEmptyOrNull());
// Load XYZ data
var pntsXyz = LookUpProfile(handle.E0, index);
return(Pair.Create(
pntsXyz.Select(pt => handle.E0.PatchTree.Info.Local2Global.TransformPos(pt)),
pntsSvbr.Select(pt => handle.E0.PatchTree.Info.Local2Global2d.TransformPos(pt))
));
}