/* Turns segments into beziers. */
private List <Bezier2> makeBeziers(List <ushort> netSegmentsIds)
{
List <Bezier2> beziers = new List <Bezier2>();
for (int i = 0; i < netSegmentsIds.Count; i++)
{
NetSegment netSegment = NetUtil.Segment(netSegmentsIds[i]);
bool smoothStart = (NetUtil.Node(netSegment.m_startNode).m_flags & NetNode.Flags.Middle) != NetNode.Flags.None;
bool smoothEnd = (NetUtil.Node(netSegment.m_endNode).m_flags & NetNode.Flags.Middle) != NetNode.Flags.None;
Bezier3 bezier = new Bezier3();
bezier.a = NetUtil.Node(netSegment.m_startNode).m_position;
bezier.d = NetUtil.Node(netSegment.m_endNode).m_position;
NetSegment.CalculateMiddlePoints(bezier.a, netSegment.m_startDirection, bezier.d, netSegment.m_endDirection, smoothStart, smoothEnd, out bezier.b, out bezier.c);
beziers.Add(Bezier2.XZ(bezier));
}
return(beziers);
}
public EdgeIntersections2(GraphTraveller2 traveller, ushort centerNodeId, Ellipse ellipse)
{
CenterNodeId = centerNodeId;
CenterNode = NetUtil.Node(centerNodeId);
this.traveller = traveller;
this.ellipse = ellipse;
if (RoundAboutBuilder.UseOldSnappingAlgorithm.value)
{
SnappingAlgorithmOld();
}
else
{
SnappingAlgorithmNew();
}
ReleaseNodesAndSegments(traveller);
}
private void SnappingAlgorithmNew()
{
//Debug
//EllipseTool.Instance.debugDraw = segmentBeziers;
List <Bezier2> segmentBeziers = makeBeziers(traveller.OuterSegments);
List <Bezier2> ellipseBeziers = traveller.Ellipse.Beziers;
List <ushort> processedSegments = new List <ushort>();
/* We find all intersections between roads and ellipse beziers */
for (int i = 0; i < segmentBeziers.Count; i++)
{
for (int j = 0; j < ellipseBeziers.Count; j++)
{
if (ellipseBeziers[j].Intersect(segmentBeziers[i], out float t1, out float t2, ITERATIONS))
{
if (processedSegments.Contains(traveller.OuterSegments[i]))
{
continue;
}
else
{
processedSegments.Add(traveller.OuterSegments[i]);
}
//Debug.Log("Segment " + i.ToString() + " intersects ellipse bezier " + j.ToString());
Vector3 intersection = new Vector3(ellipseBeziers[j].Position(t1).x, CenterNode.m_position.y, ellipseBeziers[j].Position(t1).y);
segmentBeziers[i].Divide(out Bezier2 segementBezier1, out Bezier2 segementBezier2, t2);
Bezier2 outerBezier;
Vector2 outerNodePos = new Vector2(NetUtil.Node(traveller.OuterNodes[i]).m_position.x, NetUtil.Node(traveller.OuterNodes[i]).m_position.z);
bool invert = false;
// outerBezier - the bezier outside the ellipse (not the one inside)
if (segementBezier1.Position(0f) == outerNodePos || segementBezier1.Position(1f) == outerNodePos)
{
//Debug.Log("first is outer");
outerBezier = segementBezier1.Invert();
invert = true;
}
else if (segementBezier2.Position(0f) == outerNodePos || segementBezier2.Position(1f) == outerNodePos)
{
//Debug.Log("second is probably outer");
outerBezier = segementBezier2;
invert = false;
}
else
{
throw new Exception("Error - Failed to determine segment geometry.");
}
//debug:
//EllipseTool.Instance.debugDraw.Add(outerBezier);
/* We create a node at the intersection. */
WrappedNode newNode = new WrappedNode();
newNode.Position = intersection;
newNode.NetInfo = CenterNode.Info;
RoundaboutNode raNode = new RoundaboutNode(newNode);
raNode.Create(ActionGroupRoads);
Intersections.Add(raNode);
WrappedNode outerNode = networkDictionary.RegisterNode(traveller.OuterNodes[i]);
WrappedSegment outerSegment = networkDictionary.RegisterSegment(traveller.OuterSegments[i]);
BezierToSegment(outerBezier, outerSegment, newNode, outerNode, invert);
}
}
}
}
/* Old algorithm. Originally intended only for circles. From older documentation: */
/* "For now, the intersection isn't created at the exact point where the segment crosses the circle, but rather on the intersection of
* the circle and straight line, which goes from origin and ends at outer node of that segment. That could be unfortunately very
* inaccurate, as the first note outside the circle could be quite far away". */
private void SnappingAlgorithmOld()
{
float centerX = CenterNode.m_position.x;
float centerY = CenterNode.m_position.y;
float centerZ = CenterNode.m_position.z;
for (int i = 0; i < traveller.OuterNodes.Count; i++)
{
NetNode curNode = NetUtil.Node(traveller.OuterNodes[i]);
Vector3 circleIntersection = new Vector3();
float directionX = (curNode.m_position.x - centerX) / VectorDistance(CenterNode.m_position, curNode.m_position);
float directionZ = (curNode.m_position.z - centerZ) / VectorDistance(CenterNode.m_position, curNode.m_position);
float radius = (float)ellipse.RadiusAtAbsoluteAngle(Math.Abs(Ellipse.VectorsAngle(curNode.m_position - ellipse.Center)));
if (radius > 10000)
{
throw new Exception("Algortithm error");
}
circleIntersection.x = (directionX * radius + centerX);
circleIntersection.y = centerY;
circleIntersection.z = (directionZ * radius + centerZ);
WrappedNode newNode;
WrappedSegment newSegment;
newNode = new WrappedNode();
newNode.NetInfo = CenterNode.Info;
newNode.Position = circleIntersection;
RoundaboutNode raNode = new RoundaboutNode(newNode);
raNode.Create(ActionGroupRoads);
Intersections.Add(raNode);
//EllipseTool.Instance.debugDrawPositions.Add(Intersections.Last().vector);
NetSegment curSegment = NetUtil.Segment(traveller.OuterSegments[i]);
/* For now ignoring anything regarding Y coordinate */
//float directionY2 = (GetNode(newNodeId).m_position.y - curNode.m_position.z) / NodeDistance(GetNode(newNodeId), curNode);
float directionY2 = 0f;
Vector3 startDirection = new Vector3();
startDirection.x = (directionX /** NodeDistance( GetNode( newNodeId ), curNode ) / 2*/);
startDirection.y = directionY2;
startDirection.z = (directionZ /** NodeDistance(GetNode(newNodeId), curNode) / 2*/);
Vector3 endDirection = new Vector3();
endDirection.x = -startDirection.x;
endDirection.y = -startDirection.y;
endDirection.z = -startDirection.z;
bool invert;
//Debug.Log(string.Format("same node: {0}, invert: {1}", curSegment.m_startNode == traveller.OuterNodes[i], curSegment.m_flags.IsFlagSet(NetSegment.Flags.Invert)));
if (curSegment.m_startNode == traveller.OuterNodes[i] ^ curSegment.m_flags.IsFlagSet(NetSegment.Flags.Invert))
{
invert = true;
}
else
{
invert = false;
}
newSegment = new WrappedSegment();
newSegment.StartNode = newNode;
newSegment.EndNode = networkDictionary.RegisterNode(traveller.OuterNodes[i]);
newSegment.StartDirection = startDirection;
newSegment.EndDirection = endDirection;
newSegment.NetInfo = curSegment.Info;
newSegment.Invert = invert;
ActionGroupRoads.Actions.Add(newSegment);
ActionGroupTMPE.Actions.Add(new EnteringBlockedJunctionAllowedAction(newSegment, true, true));
ActionGroupTMPE.Actions.Add(new YieldSignAction(newSegment, true));
//Debug.Log(string.Format("Segment and node created... "));
}
}