// Parse an array of grid lines and depth, converting glyphs into objects in layers
Level ParseLevel(IList <string> gridlines)
{
var width = gridlines.Max(g => g.Length);
if (gridlines.Any(l => l.Length != width))
{
CompileWarn("short level line(s)");
}
var bgobjects = new List <int>();
// create empty level of required size
var level = Level.Create(width, gridlines.Count, _gamedef.LayerCount,
(_gamedef.Levels.Count + 1).ToString());
// parse each line of the grid
for (int y = 0; y < gridlines.Count; y++)
{
var line = gridlines[y];
if (line.Length < width)
{
line += new string(line.Last(), width - line.Length);
}
// parse each column (which must be a glyph object or pile)
// track any background objects seen
for (int x = 0; x < line.Length; x++)
{
foreach (var obj in ParseAggregate(line.Substring(x, 1)))
{
if (_gamedef.Background.Contains(obj))
{
bgobjects.Add(obj);
}
var layer = _gamedef.GetLayer(obj);
if (layer != 0)
{
level[x, y, layer] = obj;
}
}
}
}
// now fill in the background
for (int cellindex = 0; cellindex < level.Length; cellindex++)
{
// a tile with no background gets the lowest number found on the level
if (!level.GetObjects(cellindex).Any(o => bgobjects.Contains(o)))
{
var bgobj = (bgobjects.Count > 0) ? bgobjects.Min() : _gamedef.Background.Min();
level[cellindex, _gamedef.GetLayer(bgobj)] = bgobj;
}
}
return(level);
}
// create object at location
internal bool CreateObject(int obj, int cellindex)
{
var layer = _gamedef.GetLayer(obj);
if (_level[cellindex, layer] == obj)
{
return(false);
}
ClearLocation(cellindex, layer);
SetCell(cellindex, layer, obj);
return(true);
}