protected override void DrawIndexedDirection(SKCanvas g, TextureTile tile, NeighbourIndex idx)
{
var points = new List <IntPoint>();
var rect = GetTileHighlightArea(tile);
var left = rect.X;
var top = rect.Y;
var right = rect.X + rect.Width - 1;
var bottom = rect.Y + rect.Height - 1;
var centerX = MidPoint(rect.X, rect.X + rect.Width);
var centerY = MidPoint(rect.Y, rect.Y + rect.Height);
switch (idx)
{
case NeighbourIndex.North:
points.Add(new IntPoint(left, top));
points.Add(new IntPoint(right, top));
break;
case NeighbourIndex.NorthEast:
points.Add(new IntPoint(centerX, top));
points.Add(new IntPoint(right, top));
points.Add(new IntPoint(right, centerY));
break;
case NeighbourIndex.East:
points.Add(new IntPoint(right, top));
points.Add(new IntPoint(right, bottom));
break;
case NeighbourIndex.SouthEast:
points.Add(new IntPoint(right, centerY));
points.Add(new IntPoint(right, bottom));
points.Add(new IntPoint(centerX, bottom));
break;
case NeighbourIndex.South:
points.Add(new IntPoint(left, bottom));
points.Add(new IntPoint(right, bottom));
break;
case NeighbourIndex.SouthWest:
points.Add(new IntPoint(centerX, bottom));
points.Add(new IntPoint(left, bottom));
points.Add(new IntPoint(left, centerY));
break;
case NeighbourIndex.West:
points.Add(new IntPoint(left, top));
points.Add(new IntPoint(left, bottom));
break;
case NeighbourIndex.NorthWest:
points.Add(new IntPoint(left, centerY));
points.Add(new IntPoint(left, top));
points.Add(new IntPoint(centerX, top));
break;
default:
throw new ArgumentOutOfRangeException(nameof(idx), idx, null);
}
var pen = Grid.TextureTileFormattingMetaData.TileHighlightColor ?? Preferences.DefaultTileHighlightColor;
g.DrawGeometry(pen, points);
}
