private static bool[,] GetExteriorWall(bool[,] layout, IEnumerable <IEnumerable <Node> > islands)
{
// First piece is always exterior walls. If it isn't, well what the f**k.
var exterior = islands.First();
var wholeShape = MapTilesToArray(layout, exterior);
// Invert the whole thing
for (int y = 0; y < wholeShape.GetLength(1); y++)
{
for (int x = 0; x < wholeShape.GetLength(0); x++)
{
wholeShape[x, y] = !wholeShape[x, y];
}
}
// Get the distinct outside of our shape.
var xx = LevelDecomposer.DecomposeLevel(wholeShape);
var exteriorTiles = xx.First(); // Should only ever be one shape here.
wholeShape = new bool[layout.GetLength(0), layout.GetLength(1)];
// Map it and return it.
foreach (var i in exteriorTiles)
{
wholeShape[i.x, i.y] = true;
}
return(wholeShape);
}
public static IEnumerable <IEnumerable <Vector2> > GenerateWallPolygon(bool[,] layout)
{
var marching = new MarchingSquare();
var islands = LevelDecomposer.DecomposeLevel(layout);
if (islands.Count() == 0)
{
throw new Exception("Downlinked Planet could not be parsed");
}
// List of Lists, where each list holds the points of an 'island'.
// An island is a collision body in the level.
var finalPoints = new List <IEnumerable <Vector2> >();
var wholeShape = GetExteriorWall(layout, islands);
finalPoints.Add(AddIsland(marching, wholeShape, false));
foreach (var island in islands.Skip(1))
{
var shape = MapTilesToArray(layout, island);
finalPoints.Add(AddIsland(marching, shape));
}
return(finalPoints);
}