// This is where the real work is done.
public void AddLine(double x, double y, double?z, double?m)
{
// If we've already found a point, then we're done. We just need to keep ignoring these
// pesky calls.
if (_foundPoint != null)
{
return;
}
// Make a point for our current position.
var thisPoint = CheckShapePointAndGet(m, Ext.GetPoint(x, y, z, m, _srid));
// is the found point between this point and the last, or past this point?
if (m != null && _measure.IsWithinRange(_lastPoint.M.Value, m.Value))
{
// now we need to do the hard work and find the point in between these two
_foundPoint = Functions.LRS.Geometry.InterpolateBetweenGeom(_lastPoint, thisPoint, _measure);
if (_lastPoint.IsWithinTolerance(_foundPoint, _tolerance))
{
_foundPoint = _lastPoint;
IsShapePoint = true;
}
else if (thisPoint.IsWithinTolerance(_foundPoint, _tolerance))
{
_foundPoint = thisPoint;
IsShapePoint = true;
}
}
else
{
// it's past this point---just step along the line
_lastPoint = thisPoint;
}
}
// Start the figure. Note that since we only operate on LineStrings, this should only be executed
// once.
public void BeginFigure(double x, double y, double?z, double?m)
{
if (_foundPoint != null)
{
return;
}
// Memorize the point.
_lastPoint = CheckShapePointAndGet(m, Ext.GetPoint(x, y, z, m, _srid));
}