public TrackHistory(int x, int y, TrackGenerator.TrackSlope slope)
{
this.X = (short)x;
this.Y = (short)y;
this.Slope = slope;
this.Mode = TrackGenerator.TrackMode.Normal;
}
private void RewriteSlopeDirection(int index, TrackGenerator.TrackSlope slope)
{
int num = (int)(slope - this._history[index].Slope);
this._history[index].Slope = slope;
for (int index1 = index; index1 < this._length; ++index1)
{
this._history[index1].Y += (short)num;
}
}
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 static bool CanSlopesTouch(
TrackGenerator.TrackSlope leftSlope,
TrackGenerator.TrackSlope rightSlope)
{
return(leftSlope == rightSlope || leftSlope == TrackGenerator.TrackSlope.Straight || rightSlope == TrackGenerator.TrackSlope.Straight);
}
private void AppendToHistory(TrackGenerator.TrackSlope slope, TrackGenerator.TrackMode mode = TrackGenerator.TrackMode.Normal)
{
this._history[this._length] = new TrackGenerator.TrackHistory((int)this._history[this._length - 1].X + this._xDirection, (int)((sbyte)this._history[this._length - 1].Y + slope), slope);
this._history[this._length].Mode = mode;
++this._length;
}
