/// <summary>
/// Moore-Neighbor Tracing algorithm.
/// </summary>
/// <param name="body">The landmass.</param>
/// <param name="i">The row.</param>
/// <param name="j">The column.</param>
private void TraceEdge(TerrainBody body, int i, int j)
{
Vector2Int start = new Vector2Int(i, j);
body.AddVertex(ArrayToPosition(i, j));
Vector2Int boundary = start;
Vector2Int enteredFrom = new Vector2Int(i, j - 1);
//Vector2Int neighbor = new Vector2Int(i - 1, j);
int neighborIndex = 6; // North in MooreNeighbor array
Vector2Int neighbor = MooreNeighbor[neighborIndex];
while (neighbor != start)
{
int row = neighbor.x;
int col = neighbor.y;
if (heights[row, col] > 0)
{
body.AddVertex(ArrayToPosition(row, col));
enteredFrom = new Vector2Int(row, col);
boundary = neighbor;
if (++neighborIndex > 7)
{
neighborIndex = 0;
}
neighbor = MooreNeighbor[neighborIndex];
//neighbor = NextMooreNeighbor(enteredFrom, neighbor);
}
else
{
if (++neighborIndex > 7)
{
neighborIndex = 0;
}
neighbor = MooreNeighbor[neighborIndex];
//neighbor = NextMooreNeighbor(enteredFrom, neighbor);
}
}
if (!body.IsValid)
{
throw new System.Exception("Landmass was not closed!");
}
}
