public static bool isSimple(IList <Vector3> poly)
{
PriorityHeap <VertexEv> evQueue = setupEvQueue(poly);
SweepLine SL = new SweepLine(poly);
//Debug.LogWarning("Queue size=" + evQueue.Count);
while (!evQueue.Empty)
{
VertexEv ev = evQueue.Pop();
if (ev.type == VertexEv.vType.LEFT)
{
int idx = SL.Add(ev.edge);
//Debug.Log("Left: " + idx + "/" + SL.Count);
if (SL.intersect(idx, idx - 1))
{
return(false);
}
if (SL.intersect(idx, idx + 1))
{
return(false);
}
}
else // right vertex
{
int idx = SL.Find(ev.edge);
//Debug.Log("Right: " + idx + "/" + SL.Count);
if (SL.intersect(idx - 1, idx + 1))
{
return(false);
}
SL.Remove(idx);
}
}
return(true);
}
/*
* List<List<Vector3>> decompose(List<Vector3> poly) {
*
* }
*/
// returns one intersection point or null if polygon is simple
static IntersectionPoint oneIntersection(IList <Vector3> poly)
{
PriorityHeap <VertexEv> evQueue = setupEvQueue(poly);
SweepLine SL = new SweepLine(poly);
IntersectionPoint I;
while (!evQueue.Empty)
{
VertexEv ev = evQueue.Pop();
if (ev.type == VertexEv.vType.LEFT)
{
int idx = SL.Add(ev.edge);
I = SL.GetIntersectionPoint(idx, idx - 1);
if (I != null)
{
return(I);
}
I = SL.GetIntersectionPoint(idx, idx + 1);
if (I != null)
{
return(I);
}
}
else // right vertex
{
int idx = SL.Find(ev.edge);
I = SL.GetIntersectionPoint(idx - 1, idx + 1);
if (I != null)
{
return(I);
}
SL.Remove(idx);
}
}
return(null);
}
public static void BentleyOttmann(IList <Vector3> poly)
{
PriorityHeap <VertexEv> evQ = setupEvQueue(poly);
SweepLine SL = new SweepLine(poly);
Dictionary <int, IntersectionPoint> intersectionPoints = new Dictionary <int, IntersectionPoint>();
IntersectionPoint I;
while (!evQ.Empty)
{
VertexEv ev = evQ.Pop();
if (ev.type == VertexEv.vType.LEFT)
{
int idx = SL.Add(ev.edge);
I = SL.GetIntersectionPoint(idx, idx - 1);
if (I != null) // Intersection
{
int ID = I.Id(poly.Count);
if (!intersectionPoints.ContainsKey(ID))
{
intersectionPoints[ID] = I;
//evQ.Add(new VertexEv(I.v, I.Edge1, I.Edge2, VertexEv.vType.INTERSECT));
evQ.Add(new VertexEv(I));
}
}
I = SL.GetIntersectionPoint(idx, idx + 1);
if (I != null) // intersection
{
int ID = I.Id(poly.Count);
if (!intersectionPoints.ContainsKey(ID))
{
intersectionPoints[ID] = I;
evQ.Add(new VertexEv(I.P, I.Edge1, I.Edge2, VertexEv.vType.INTERSECT));
}
}
}
else if (ev.type == VertexEv.vType.RIGHT)
{
int idx = SL.Find(ev.edge);
I = SL.GetIntersectionPoint(idx - 1, idx + 1);
if (I != null)
{
int ID = I.Id(poly.Count);
if (!intersectionPoints.ContainsKey(ID))
{
intersectionPoints[ID] = I;
evQ.Add(new VertexEv(I));
}
}
}
else // intersection point
// unfinished business ...
{
}
}
}