private void initTrack(int startX, int startY, char[][] grid)
{
//Place a "ghost" cart on the track that will ride the entire length of the track, acting as a "rail layer" so-to-speak
//since we are starting at the top left, we can safely go right OR down. But we are gonna choose right.
var track = new Track(new Coord(startX, startY));
track.AddRail(startX, startY, grid[startX][startY], true);
//Now, starting from our initial position, "ride" along the track, "laying" the rails and turning as needed until we get back
//to our initial position.
var nextX = startX;
var nextY = startY + 1;
var currentDirection = Direction.Right;
//In our array of arrays, "Down" is when X is INCREASING. "Right" is when Y is INCREASING.
while (!track.IsComplete)
{
var nextRail = grid[nextX][nextY];
if (!nextRail.IsCurve())
{
if (nextRail.IsIntersection())
{
track.AddRail(nextX, nextY, nextRail, IntersectionMap);
}
else
{
track.AddRail(nextX, nextY, nextRail);
}
switch (currentDirection)
{
case Direction.Right:
nextY++;
break;
case Direction.Left:
nextY--;
break;
case Direction.Down:
nextX++;
break;
case Direction.Up:
nextX--;
break;
}
}
else
{
track.AddRail(nextX, nextY, nextRail);
if (nextRail == '\\')
{
switch (currentDirection)
{
case Direction.Right:
currentDirection = Direction.Down;
nextX = nextX + 1;
break;
case Direction.Left:
currentDirection = Direction.Up;
nextX = nextX - 1;
break;
case Direction.Down:
currentDirection = Direction.Right;
nextY = nextY + 1;
break;
case Direction.Up:
currentDirection = Direction.Left;
nextY = nextY - 1;
break;
}
}
else if (nextRail == '/')
{
switch (currentDirection)
{
case Direction.Down:
currentDirection = Direction.Left;
nextY = nextY - 1;
break;
case Direction.Up:
currentDirection = Direction.Right;
nextY = nextY + 1;
break;
case Direction.Right:
currentDirection = Direction.Up;
nextX = nextX - 1;
break;
case Direction.Left:
currentDirection = Direction.Down;
nextX = nextX + 1;
break;
}
}
}
}
Tracks.Add(track);
}
