private static bool FindSuitableOrigin(ref Point origin)
{
TrackGenerator.TrackPlacementState stateForLocation;
while ((stateForLocation = TrackGenerator.CalculateStateForLocation(origin.X, origin.Y)) != TrackGenerator.TrackPlacementState.Obstructed)
{
++origin.Y;
if (stateForLocation == TrackGenerator.TrackPlacementState.Invalid)
{
return(false);
}
}
--origin.Y;
return(TrackGenerator.CalculateStateForLocation(origin.X, origin.Y) == TrackGenerator.TrackPlacementState.Available);
}
private TrackGenerator.TrackPlacementState CreateTunnel()
{
TrackGenerator.TrackSlope trackSlope1 = TrackGenerator.TrackSlope.Straight;
int num = 10;
TrackGenerator.TrackPlacementState trackPlacementState1 = TrackGenerator.TrackPlacementState.Invalid;
int x = (int)this._history[this._length - 1].X;
int y = (int)this._history[this._length - 1].Y;
for (TrackGenerator.TrackSlope trackSlope2 = TrackGenerator.TrackSlope.Up; trackSlope2 <= TrackGenerator.TrackSlope.Down; ++trackSlope2)
{
TrackGenerator.TrackPlacementState trackPlacementState2 = TrackGenerator.TrackPlacementState.Invalid;
for (int index = 1; index < num; ++index)
{
trackPlacementState2 = TrackGenerator.CalculateStateForLocation(x + index * this._xDirection, y + index * (int)trackSlope2);
switch (trackPlacementState2)
{
case TrackGenerator.TrackPlacementState.Obstructed:
continue;
case TrackGenerator.TrackPlacementState.Invalid:
goto label_6;
default:
trackSlope1 = trackSlope2;
num = index;
trackPlacementState1 = trackPlacementState2;
goto label_6;
}
}
label_6:
if (trackPlacementState1 != TrackGenerator.TrackPlacementState.Available && trackPlacementState2 == TrackGenerator.TrackPlacementState.Obstructed && (trackPlacementState1 != TrackGenerator.TrackPlacementState.Obstructed || trackSlope1 != TrackGenerator.TrackSlope.Straight))
{
trackSlope1 = trackSlope2;
num = 10;
trackPlacementState1 = trackPlacementState2;
}
}
if (this._length == 0 || !TrackGenerator.CanSlopesTouch(this._history[this._length - 1].Slope, trackSlope1))
{
this.RewriteSlopeDirection(this._length - 1, TrackGenerator.TrackSlope.Straight);
}
this._history[this._length - 1].Mode = TrackGenerator.TrackMode.Tunnel;
for (int index = 1; index < num; ++index)
{
this.AppendToHistory(trackSlope1, TrackGenerator.TrackMode.Tunnel);
}
return(trackPlacementState1);
}
private TrackGenerator.TrackPlacementState GetHistorySegmentPlacementState(
int startIndex,
int length)
{
TrackGenerator.TrackPlacementState trackPlacementState = TrackGenerator.TrackPlacementState.Available;
for (int index = startIndex; index < startIndex + length; ++index)
{
TrackGenerator.TrackPlacementState stateForLocation = TrackGenerator.CalculateStateForLocation((int)this._history[index].X, (int)this._history[index].Y);
switch (stateForLocation)
{
case TrackGenerator.TrackPlacementState.Obstructed:
if (this._history[index].Mode != TrackGenerator.TrackMode.Tunnel)
{
trackPlacementState = stateForLocation;
break;
}
break;
case TrackGenerator.TrackPlacementState.Invalid:
return(stateForLocation);
}
}
return(trackPlacementState);
}