public virtual IEnumerable <TileChange> DrawOn(ScreenDocument screen, int tile_x, int tile_y)
{
var old = screen.TileAt(tile_x, tile_y);
if (old == null)
{
return(Enumerable.Empty <TileChange>());
}
if (old.Id == _tile.Id)
{
return(Enumerable.Empty <TileChange>());
}
var selection = screen.Selection;
if (selection != null)
{
// only paint inside selection
if (!selection.Value.Contains(tile_x, tile_y))
{
return(null);
}
}
screen.ChangeTile(tile_x, tile_y, _tile.Id);
return(new[] { new TileChange(screen, tile_x, tile_y, old.Id, _tile.Id) });
}
/// <summary>
/// Draws the brush onto the given screen at the given tile location.
/// </summary>
public IEnumerable <TileChange> DrawOn(ScreenDocument screen, int tile_x, int tile_y)
{
List <TileChange> undo = new List <TileChange>();
bool changed = false;
foreach (TileBrushCell[] col in _cells)
{
foreach (TileBrushCell cell in col)
{
var old = screen.TileAt(cell.x + tile_x, cell.y + tile_y);
if (old == null)
{
continue;
}
undo.Add(new TileChange(screen, cell.x, cell.y, old.Id, cell.tile.Id));
if (old.Id != cell.tile.Id)
{
changed = true;
screen.ChangeTile(cell.x + tile_x, cell.y + tile_y, cell.tile.Id);
}
}
}
if (changed)
{
return(undo);
}
return(Enumerable.Empty <TileChange>());
}
/// <summary>
/// Draws the brush onto the given screen at the given tile location.
/// </summary>
public IEnumerable<TileChange> DrawOn(ScreenDocument screen, int tile_x, int tile_y)
{
List<TileChange> undo = new List<TileChange>();
bool changed = false;
foreach (TileBrushCell[] col in _cells)
{
foreach (TileBrushCell cell in col)
{
var old = screen.TileAt(cell.x + tile_x, cell.y + tile_y);
if (old == null) continue;
undo.Add(new TileChange(screen, cell.x, cell.y, old.Id, cell.tile.Id));
if (old.Id != cell.tile.Id)
{
changed = true;
screen.ChangeTile(cell.x + tile_x, cell.y + tile_y, cell.tile.Id);
}
}
}
if (changed)
{
return undo;
}
return Enumerable.Empty<TileChange>();
}
public virtual IEnumerable<TileChange> DrawOn(ScreenDocument screen, int tile_x, int tile_y)
{
var old = screen.TileAt(tile_x, tile_y);
if (old == null)
{
return Enumerable.Empty<TileChange>();
}
if (old.Id == _tile.Id)
{
return Enumerable.Empty<TileChange>();
}
var selection = screen.Selection;
if (selection != null)
{
// only paint inside selection
if (!selection.Value.Contains(tile_x, tile_y)) return null;
}
screen.ChangeTile(tile_x, tile_y, _tile.Id);
return new[] { new TileChange(screen, tile_x, tile_y, old.Id, _tile.Id) };
}