public static MonotoneLayout Split(this PlainShape shape, long maxEdge, NativeArray <IntVector> extraPoints, Allocator allocator)
{
var navigator = shape.GetNavigator(maxEdge, extraPoints, Allocator.Temp);
var links = new DynamicArray <Link>(navigator.links, allocator);
var natures = navigator.natures;
var sortIndices = navigator.indices;
int n = sortIndices.Length;
var subs = new DynamicArray <Sub>(8, Allocator.Temp);
var dSubs = new DynamicArray <DualSub>(8, Allocator.Temp);
var indices = new DynamicArray <int>(16, allocator);
var slices = new DynamicArray <Slice>(16, allocator);
int i = 0;
nextNode:
while (i < n)
{
int sortIndex = sortIndices[i];
var node = links[sortIndex];
var nature = natures[sortIndex];
int j;
switch (nature)
{
case LinkNature.start:
subs.Add(new Sub(node));
++i;
goto nextNode;
case LinkNature.extra:
j = 0;
while (j < dSubs.Count)
{
var dSub = dSubs[j];
var pA = dSub.next.vertex.point;
var pB = links[dSub.next.next].vertex.point;
var pC = links[dSub.prev.prev].vertex.point;
var pD = dSub.prev.vertex.point;
var p = node.vertex.point;
if (IsTetragonContain(p, pA, pB, pC, pD))
{
var hand = links[dSub.middle];
slices.Add(new Slice(hand.vertex.index, node.vertex.index));
links.ConnectExtraPrev(hand.self, node.self);
dSubs[j] = new DualSub(links[dSub.next.self], node.self, links[dSub.prev.self]);
i += 1;
goto nextNode;
}
j += 1;
} // while dSubs
j = 0;
while (j < subs.Count)
{
var sub = subs[j];
var pA = sub.next.vertex.point;
var pB = links[sub.next.next].vertex.point;
var pC = links[sub.prev.prev].vertex.point;
var pD = sub.prev.vertex.point;
var p = node.vertex.point;
if (IsTetragonContain(p, pA, pB, pC, pD))
{
if (!sub.isEmpty)
{
if (pA.x > pD.x)
{
var hand = sub.next;
slices.Add(new Slice(hand.vertex.index, node.vertex.index));
var newHandIndex = links.ConnectExtraNext(hand.self, node.self);
dSubs.Add(new DualSub(links[newHandIndex], node.self, links[sub.prev.self]));
}
else
{
var hand = sub.prev;
slices.Add(new Slice(hand.vertex.index, node.vertex.index));
var newHandIndex = links.ConnectExtraPrev(hand.self, node.self);
dSubs.Add(new DualSub(links[sub.next.self], node.self, links[newHandIndex]));
}
}
else
{
var hand = links[sub.next.self];
slices.Add(new Slice(hand.vertex.index, b: node.vertex.index));
var newPrev = links.ConnectExtraPrev(hand.self, node.self);
dSubs.Add(new DualSub(links[hand.self], node.self, links[newPrev]));
}
subs.Exclude(j);
i += 1;
goto nextNode;
}
j += 1;
}
break;
case LinkNature.merge:
var newNextSub = new Sub(true);
var newPrevSub = new Sub(true);
j = 0;
while (j < dSubs.Count)
{
var dSub = dSubs[j];
if (dSub.next.next == node.self)
{
var a = node.self;
var b = dSub.middle;
var bridge = links.Connect(a, b);
indices.Add(links.FindStart(bridge.a.self));
slices.Add(bridge.Slice);
var prevSub = new Sub(links[a], dSub.prev);
if (!newNextSub.isEmpty)
{
dSubs[j] = new DualSub(newNextSub, prevSub);
++i;
goto nextNode;
}
dSubs.Exclude(j);
newPrevSub = prevSub;
continue;
}
else if (dSub.prev.prev == node.self)
{
var a = dSub.middle;
var b = node.self;
var bridge = links.Connect(a, b);
indices.Add(links.FindStart(bridge.a.self));
slices.Add(bridge.Slice);
var nextSub = new Sub(dSub.next, links[b]);
if (!newPrevSub.isEmpty)
{
dSubs[j] = new DualSub(nextSub, newPrevSub);
++i;
goto nextNode;
}
dSubs.Exclude(j);
newNextSub = nextSub;
continue;
}
++j;
} // while dSubs
j = 0;
while (j < subs.Count)
{
var sub = subs[j];
if (sub.next.next == node.self)
{
sub.next = node;
subs.Exclude(j);
if (!newNextSub.isEmpty)
{
dSubs.Add(new DualSub(newNextSub, sub));
++i;
goto nextNode;
}
newPrevSub = sub;
continue;
}
else if (sub.prev.prev == node.self)
{
sub.prev = node;
subs.Exclude(j);
if (!newPrevSub.isEmpty)
{
dSubs.Add(new DualSub(sub, newPrevSub));
++i;
goto nextNode;
}
newNextSub = sub;
continue;
}
++j;
}
break;
case LinkNature.split:
j = 0;
while (j < subs.Count)
{
var sub = subs[j];
var pA = sub.next.vertex.point;
var pB = links[sub.next.next].vertex.point;
var pC = links[sub.prev.prev].vertex.point;
var pD = sub.prev.vertex.point;
var p = node.vertex.point;
if (IsTetragonContain(p, pA, pB, pC, pD))
{
var a0 = sub.next.self;
var a1 = sub.prev.self;
var b = node.self;
if (pA.x > pD.x)
{
var bridge = links.Connect(a0, b);
subs.Add(new Sub(bridge.b, links[a1]));
slices.Add(bridge.Slice);
}
else
{
var bridge = links.Connect(a1, b);
subs.Add(new Sub(bridge.b, bridge.a));
slices.Add(bridge.Slice);
}
subs[j] = new Sub(links[a0], links[b]);
++i;
goto nextNode;
}
++j;
}
j = 0;
while (j < dSubs.Count)
{
var dSub = dSubs[j];
var pA = dSub.next.vertex.point;
var pB = links[dSub.next.next].vertex.point;
var pC = links[dSub.prev.prev].vertex.point;
var pD = dSub.prev.vertex.point;
var p = node.vertex.point;
if (IsTetragonContain(p, pA, pB, pC, pD))
{
var a = dSub.middle;
var b = node.self;
var bridge = links.Connect(a, b);
subs.Add(new Sub(dSub.next, links[b]));
subs.Add(new Sub(bridge.b, dSub.prev));
slices.Add(bridge.Slice);
dSubs.Exclude(j);
++i;
goto nextNode;
}
++j;
} // while dSubs
break;
case LinkNature.end:
j = 0;
while (j < subs.Count)
{
var sub = subs[j];
// second condition is useless because it repeats the first
if (sub.next.next == node.self) /* || sub.prev.prev.index == node.this */
{
indices.Add(links.FindStart(node.self));
subs.Exclude(j);
++i;
goto nextNode;
}
++j;
}
j = 0;
while (j < dSubs.Count)
{
var dSub = dSubs[j];
// second condition is useless because it repeats the first
if (dSub.next.next == node.self) /*|| dSub.prevSub.prev.prev.index == node.this*/
{
var a = dSub.middle;
var b = node.self;
var bridge = links.Connect(a, b);
indices.Add(links.FindStart(a));
indices.Add(links.FindStart(bridge.a.self));
slices.Add(bridge.Slice);
dSubs.Exclude(j);
// goto next node
++i;
goto nextNode;
}
++j;
} // while dSubs
break;
case LinkNature.simple:
j = 0;
while (j < subs.Count)
{
var sub = subs[j];
if (sub.next.next == node.self)
{
sub.next = node;
subs[j] = sub;
++i;
goto nextNode;
}
else if (sub.prev.prev == node.self)
{
sub.prev = node;
subs[j] = sub;
// goto next node
++i;
goto nextNode;
}
++j;
}
j = 0;
while (j < dSubs.Count)
{
var dSub = dSubs[j];
if (dSub.next.next == node.self)
{
var a = dSub.middle;
var b = node.self;
var bridge = links.Connect(a, b);
indices.Add(links.FindStart(node.self));
slices.Add(bridge.Slice);
var newSub = new Sub(bridge.b, dSub.prev);
subs.Add(newSub);
dSubs.Exclude(j);
// goto next node
++i;
goto nextNode;
}
else if (dSub.prev.prev == node.self)
{
var a = node.self;
var b = dSub.middle;
var bridge = links.Connect(a, b);
indices.Add(links.FindStart(node.self));
slices.Add(bridge.Slice);
var newSub = new Sub(links[dSub.next.self], bridge.a);
subs.Add(newSub);
dSubs.Exclude(j);
// goto next node
++i;
goto nextNode;
}
++j;
} // while dSubs
break;
} // switch
}
subs.Dispose();
dSubs.Dispose();
navigator.Dispose();
int pathCount = navigator.pathCount;
int extraCount = navigator.extraCount;
return(new MonotoneLayout(pathCount, extraCount, links.Convert(), slices.Convert(), indices.Convert()));
}