public void UpdateRailSegment(int index, Vector3[] controlPoints)
{
RailSegment segment = RailSegments[index];
segment.Curve.SetControlPoints(controlPoints);
Definition.CreateGeometry(RailSegments);
}
private void PutLastWheelsetOnTrack()
{
float distance = Definition.DistanceFromFirstToLastWheelset * -FirstWheelsetDirectionOfT;
LastWheelsetSegmentT = FirstWheelsetSegmentT;
LastWheelsetDirectionOfT = FirstWheelsetDirectionOfT;
LastWheelsetSegment = FirstWheelsetSegment.MoveSignedDistance(distance, ref LastWheelsetSegmentT, ref LastWheelsetDirectionOfT);
}
public void PutOnTrack(RailSegment firstWheelsetSegment, float firstWheelsetT, bool sameDirectionAsSegment)
{
FirstWheelsetSegment = firstWheelsetSegment;
FirstWheelsetSegmentT = firstWheelsetT;
FirstWheelsetDirectionOfT = sameDirectionAsSegment ? 1 : -1;
PutLastWheelsetOnTrack();
}
public void RemoveRailSegment(RailSegment segment)
{
if (!RailSegments.Contains(segment))
{
return;
}
segment.Detach();
RailSegments.Remove(segment);
}
public void RestorePreviousParameters()
{
FirstWheelsetSegment = m_previousFirstWheelsetSegment;
FirstWheelsetSegmentT = m_previousFirstWheelsetSegmentT;
FirstWheelsetDirectionOfT = m_previousFirstWheelsetDirectionOfT;
LastWheelsetSegment = m_previousLastWheelsetSegment;
LastWheelsetSegmentT = m_previousLastWheelsetSegmentT;
LastWheelsetDirectionOfT = m_previousLastWheelsetDirectionOfT;
}
public void Detach()
{
foreach (ConnectedSegmentInfo connectedSegmentInfo in ConnectedSegmentInfos)
{
RailSegment connectedSegment = connectedSegmentInfo.RailSegment;
int removeIndex = connectedSegment.GetConnectionIndex(this);
connectedSegment.ConnectedSegmentInfos.RemoveAt(removeIndex);
}
ConnectedSegmentInfos.Clear();
}
private int GetConnectionIndex(RailSegment segment)
{
for (int k = 0; k < ConnectedSegmentInfos.Count; k++)
{
if (ConnectedSegmentInfos[k].RailSegment == segment)
{
return(k);
}
}
throw new ArgumentException("Given segment is not connected");
}
private void UpdateLastWheelsetPosition()
{
if (Definition.Wheelsets.Length == 1)
{
LastWheelsetSegment = FirstWheelsetSegment;
LastWheelsetSegmentT = FirstWheelsetSegmentT;
LastWheelsetDirectionOfT = FirstWheelsetDirectionOfT;
return;
}
Vector3 firstWheelsetPosition = FirstWheelsetSegment.GetCurvePositionInWorldSpace(FirstWheelsetSegmentT);
Vector3 lastWheelsetPosition = LastWheelsetSegment.GetCurvePositionInWorldSpace(LastWheelsetSegmentT);
float wantedDistance = Definition.DistanceFromFirstToLastWheelset;
float actualDistance = (firstWheelsetPosition - lastWheelsetPosition).magnitude;
float distanceToMove = LastWheelsetDirectionOfT * (actualDistance - wantedDistance);
LastWheelsetSegment = LastWheelsetSegment.MoveSignedDistance(distanceToMove, ref LastWheelsetSegmentT, ref LastWheelsetDirectionOfT);
}
protected RailPiece(RailPieceDefinition definition, bool copyCurves, bool copyGeometry)
{
ID = FirstUnusedID++;
Definition = definition;
GameObject = new GameObject("Rail piece " + ID);
// Copy rail segments. Cannot share segments of definition,
// because of next and previous fields in rail segments that must
// be different for each rail piece instance.
RailSegments = new RailSegment[definition.RailSegments.Length];
for (int k = 0; k < RailSegments.Length; k++)
{
RailSegments[k] = new RailSegment(definition.RailSegments[k], this, copyCurves);
}
GameObject = (GameObject)Object.Instantiate(definition.GetPrefab());
if (copyGeometry)
{
}
}
public void ConnectSegment(RailSegment segment, bool asPreviousSegment, bool segmentHasSameTDirection)
{
// Add segment to list of connected segments
var segmentInfo = new ConnectedSegmentInfo
{
RailSegment = segment,
AsPrevious = asPreviousSegment,
SameTDirection = segmentHasSameTDirection
};
ConnectedSegmentInfos.Add(segmentInfo);
// Add me to other segment's list of connected segments
var otherSegmentInfo = new ConnectedSegmentInfo
{
RailSegment = this,
AsPrevious = asPreviousSegment ? !segmentHasSameTDirection : segmentHasSameTDirection,
SameTDirection = segmentHasSameTDirection
};
segment.ConnectedSegmentInfos.Add(otherSegmentInfo);
}
public void AddRailSegment(RailSegment segment)
{
if (RailSegments.Contains(segment))
{
// If the segment is in the list of rail segments, then
// it is already connected to other segments in the list
// and also should not be added to the list again
return;
}
// Segment should not be connected to anything
Debug.Assert(segment.ConnectedSegmentInfos.Count == 0);
// Try to connect the segment to connectors of segments in the system
foreach (RailSegment systemSegment in RailSegments)
{
/*
* Matrix systemTransform = systemSegment.WorldTransformation;
* Matrix transform = segment.WorldTransformation;
*
* Vector3 systemCurveStartInWorldSpace = Vector3.Transform(systemSegment.Curve.GetPosition(0), systemTransform);
* Vector3 systemCurveDirectionInWorldSpace = Vector3.TransformNormal(systemSegment.Curve.GetTangent(0), systemTransform);
*
* Vector3 curveStartInWorldSpace = Vector3.Transform(segment.Curve.GetPosition(0), transform);
* Vector3 curveDirectionInWorldSpace = Vector3.TransformNormal(segment.Curve.GetTangent(0), transform);
*
* if (systemCurveStartInWorldSpace.EqualsWithEpsilon(curveStartInWorldSpace, ConnectionEpsilon) &&
* Vector3.Dot(systemCurveDirectionInWorldSpace, -curveDirectionInWorldSpace) > 0.9f)
* {
* // Open connectors of both segments at t = 0 connect
* // I.E. tail-to-tail connection
* systemSegment.ConnectSegment(segment, true, false);
* }
*
* Vector3 curveEndInWorldSpace = Vector3.Transform(segment.Curve.GetPosition(1), transform);
* curveDirectionInWorldSpace = Vector3.TransformNormal(segment.Curve.GetTangent(1), transform);
*
* if (systemCurveStartInWorldSpace.EqualsWithEpsilon(curveEndInWorldSpace, ConnectionEpsilon) &&
* Vector3.Dot(systemCurveDirectionInWorldSpace, curveDirectionInWorldSpace) > 0.9f)
* {
* // system segment's connector at t = 0 connects with segment's connector at t = 1
* // I.E. tail-to-head connection
* systemSegment.ConnectSegment(segment, true, true);
* }
*
* Vector3 systemCurveEndInWorldSpace = Vector3.Transform(systemSegment.Curve.GetPosition(1), systemTransform);
* systemCurveDirectionInWorldSpace = Vector3.TransformNormal(systemSegment.Curve.GetTangent(1), systemTransform);
*
* curveStartInWorldSpace = Vector3.Transform(segment.Curve.GetPosition(0), transform);
* curveDirectionInWorldSpace = Vector3.TransformNormal(segment.Curve.GetTangent(0), transform);
*
* if (systemCurveEndInWorldSpace.EqualsWithEpsilon(curveStartInWorldSpace, ConnectionEpsilon) &&
* Vector3.Dot(systemCurveDirectionInWorldSpace, curveDirectionInWorldSpace) > 0.9f)
* {
* // system segment's connector at t = 1 connects with segment's connector at t = 1
* // I.E. head-to-tail connection
* systemSegment.ConnectSegment(segment, false, true);
* }
*
* curveEndInWorldSpace = Vector3.Transform(segment.Curve.GetPosition(1), transform);
* curveDirectionInWorldSpace = Vector3.TransformNormal(segment.Curve.GetTangent(1), transform);
*
* if (systemCurveEndInWorldSpace.EqualsWithEpsilon(curveEndInWorldSpace, ConnectionEpsilon) &&
* Vector3.Dot(systemCurveDirectionInWorldSpace, -curveDirectionInWorldSpace) > 0.9f)
* {
* // Open connectors of both segments at t = 1 connect
* // I.E. head-to-head connection
* systemSegment.ConnectSegment(segment, false, false);
* }
*/
}
RailSegments.Add(segment);
}
public RailSegment(RailSegment source, RailPiece railPiece, bool copyCurve)
{
RailPiece = railPiece;
Curve = copyCurve ? new BezierCurve3(source.Curve) : source.Curve;
}
public RailSegment MoveSignedDistance(float signedDistance, ref float t, ref int directionAlongT)
{
// Move over the rail segment for the given distance, going to a next or previous
// segment if the distance to move is bigger than the distance to the end of the curve of the segment.
// If it is, subtract the remaining length on the curve from the distance to travel, set the new
// segment as the current segment, and repeat.
// The distance to move is signed indicating the direction to move over the segment(s). Positive means
// in the same direction as curve parameter t (going from 0 to 1).
// Segments can be connected in different ways (head to head, head to tail, etc). Variable XXX
// is used to keep track of the direction on the curve. If true, we are moving from current curve parameter
// t = <current> to t = 0. If false, we move towards t = 1
float remainingDistance = Math.Abs(signedDistance);
bool movePositiveInitial = signedDistance > 0;
bool movePositive = movePositiveInitial;
RailSegment currentSegment = this;
while (remainingDistance > 0)
{
float curvePosition = currentSegment.Curve.GetLength(0, t);
if (movePositive)
{
// Moving over curve towards t = 1 (positive direction)
float remainingCurveLength = Curve.Length - curvePosition;
if (remainingDistance <= remainingCurveLength)
{
// More curve remaining than distance to move. Update time and done
curvePosition += remainingDistance;
t = currentSegment.Curve.GetTime(curvePosition, 32, CurvePositionTolerance);
remainingDistance = 0;
}
else
{
// More distance to move than curve length remaining.
// Move to end of curve, set next curve as current (if it exists), and continue
remainingDistance -= remainingCurveLength;
ConnectedSegmentInfo connectedSegmentInfo = GetActiveConnectedSegment(false);
if (connectedSegmentInfo.RailSegment != null)
{
if (connectedSegmentInfo.SameTDirection)
{
t = 0;
}
else
{
movePositive = false;
t = 1;
}
currentSegment = connectedSegmentInfo.RailSegment;
}
else
{
// No active next segment: end of track and done
currentSegment = null;
remainingDistance = 0;
t = 1;
}
}
}
else
{
// Moving over curve towards t = 0 (negative direction)
if (remainingDistance <= curvePosition)
{
// More curve remaining than distance to move. Update time and done
curvePosition -= remainingDistance;
t = currentSegment.Curve.GetTime(curvePosition, 32, CurvePositionTolerance);
remainingDistance = 0;
}
else
{
// More distance to move than curve length remaining.
// Move to start of curve, set previous curve as current (if it exists), and continue
remainingDistance -= curvePosition;
ConnectedSegmentInfo connectedSegmentInfo = GetActiveConnectedSegment(true);
if (connectedSegmentInfo.RailSegment != null)
{
if (connectedSegmentInfo.SameTDirection)
{
t = 1;
}
else
{
movePositive = true;
t = 0;
}
currentSegment = connectedSegmentInfo.RailSegment;
}
else
{
// No active previous segment: end of track and done
currentSegment = null;
remainingDistance = 0;
t = 1;
}
}
}
}
if (movePositive != movePositiveInitial)
{
directionAlongT = -directionAlongT;
}
return(currentSegment);
}
