public List <RangeAxis2d> GetExtentsAxes()
{
if (m_extents == null)
{
return(null);
}
if (m_extentsAxes == null)
{
RangeAxis2d yLines = new RangeAxis2d(m_basis, 0);
int minX = m_basis.ToGrid(0, m_extents.Min.X);
int maxX = m_basis.ToGrid(0, m_extents.Max.X);
for (int x = minX; x <= maxX; ++x)
{
yLines.Add(x, new Range1d(m_extents.Min.Y, m_extents.Max.Y));
}
RangeAxis2d xLines = new RangeAxis2d(m_basis, 1);
int minY = m_basis.ToGrid(0, m_extents.Min.Y);
int maxY = m_basis.ToGrid(0, m_extents.Max.Y);
for (int y = minY; y <= maxY; ++y)
{
xLines.Add(y, new Range1d(m_extents.Min.X, m_extents.Max.X));
}
m_extentsAxes = new List <RangeAxis2d>();
m_extentsAxes.Add(yLines); // Ordinal 0
m_extentsAxes.Add(xLines); // Ordinal 1
}
return(m_extentsAxes);
}
internal RangeAxis2d GetAxisSegments(PointAxis2d intersections)
{
int ordinal = intersections.Ordinal;
RangeAxis2d collinearSegments = new RangeAxis2d(m_basis, ordinal);
foreach (Polygon2d polygon in m_outline.Polygons)
{
foreach (Line2d line in polygon.Lines)
{
RangeAxis2d.Value value = RangeAxis2d.Value.FromLine2d(m_basis, ordinal, line, false);
if (value != null)
{
collinearSegments.Add(value);
}
}
}
RangeAxis2d segments = new RangeAxis2d(m_basis, ordinal);
foreach (KeyValuePair <int, List <double> > value in intersections.Points)
{
int abscissa = value.Key;
List <double> ordinates = value.Value;
if (ordinates.Count < 2)
{
continue;
}
for (int index = 0; index < ordinates.Count - 1;)
{
double first = ordinates[index++];
double next = ordinates[index++];
if (index < ordinates.Count)
{
Range1d segment = collinearSegments.Contains(new PointAxis2d.Value(abscissa, next));
if (segment != null && ordinates.Count % 3 == 0)
{
next = ordinates[index++];
}
}
segments.Add(abscissa, new Range1d(first, next));
}
}
return(segments);
}
public RangeAxis2d TrimToGrid(RangeAxis2d other)
{
RangeAxis2d axis = new RangeAxis2d(this, other.Ordinal);
foreach (KeyValuePair <int, List <Range1d> > segments in other.Lines)
{
foreach (Range1d segment in segments.Value)
{
double p0 = Ceiling(axis.Ordinal, segment.Min);
double p1 = Floor(axis.Ordinal, segment.Max);
axis.Add(segments.Key, new Range1d(p0, p1));
}
}
return(axis);
}