public void SplitBeachSection(Point site)
{
BeachSection containingBeachSection = BeachSectionContainingPoint(site);
BeachSection newBeachSectionLeft = new BeachSection(containingBeachSection.focus, containingBeachSection.leftBoundary, site);
BeachSection newBeachSectionCentre = new BeachSection(site, containingBeachSection.focus, containingBeachSection.focus);
BeachSection newBeachSectionRight = new BeachSection(containingBeachSection.focus, site, containingBeachSection.rightBoundary);
beachSections.Remove(containingBeachSection);
beachSections.Add(newBeachSectionLeft);
beachSections.Add(newBeachSectionCentre);
beachSections.Add(newBeachSectionRight);
foreach (IntersectEventPoint iep in IntersectEventPoint.FromBeachSections(new List <BeachSection> {
newBeachSectionLeft, newBeachSectionRight
}))
{
if (iep.Point().y <= site.y)
{
eventQueue.Add(iep);
}
}
foreach (IntersectEventPoint iep in IntersectEventPoint.FromBeachSections(new List <BeachSection> {
containingBeachSection
}))
{
if (iep.Point().y <= site.y)
{
eventQueue.Remove(iep);
}
}
}
public void ConsumeBeachSection(IntersectEventPoint intersectEventPoint)
{
BeachSection consumedBeachSection = intersectEventPoint.consumedBeachSection;
BeachSection leftBeachSection = beachSections.Predecessor(consumedBeachSection);
BeachSection rightBeachSection = beachSections.Successor(consumedBeachSection);
BeachSection newLeftBeachSection = new BeachSection(leftBeachSection.focus, leftBeachSection.leftBoundary, rightBeachSection.focus);
BeachSection newRightBeachSection = new BeachSection(rightBeachSection.focus, leftBeachSection.focus, rightBeachSection.rightBoundary);
beachSections.Remove(consumedBeachSection);
beachSections.Remove(leftBeachSection);
beachSections.Remove(rightBeachSection);
beachSections.Add(newLeftBeachSection);
beachSections.Add(newRightBeachSection);
foreach (IntersectEventPoint iep in IntersectEventPoint.FromBeachSections(new List <BeachSection> {
leftBeachSection, rightBeachSection
}))
{
if (iep.Point().y <= intersectEventPoint.Point().y)
{
eventQueue.Remove(iep);
}
}
foreach (IntersectEventPoint iep in IntersectEventPoint.FromBeachSections(new List <BeachSection> {
newLeftBeachSection, newRightBeachSection
}))
{
if (iep.Point().y <= intersectEventPoint.Point().y)
{
if (!iep.Equals(intersectEventPoint))
{
eventQueue.Add(iep);
}
}
}
}
