public TileShape(byte flags, TileEdge top, TileEdge right, TileEdge bottom, TileEdge left)
{
Flags = flags;
Clip = ExpandClip(top, right, bottom, left);
Top = top;
Right = right;
Bottom = bottom;
Left = left;
}
private static Point[] ExpandClip(TileEdge top, TileEdge right, TileEdge bottom, TileEdge left)
{
var ret = new List<Point>();
if (top != null) {
ret.Add(new Point(top.X1, top.Y1));
ret.Add(new Point(top.X2, top.Y2));
}
if (right != null) {
if (ret.Count == 0)
ret.Add(new Point(right.X1, right.Y1));
else
Debug.Assert(ret[ret.Count - 1] == new Point(right.X1, right.Y1));
ret.Add(new Point(right.X2, right.Y2));
}
if (bottom != null) {
Debug.Assert(ret[ret.Count - 1] == new Point(bottom.X1, bottom.Y1));
ret.Add(new Point(bottom.X2, bottom.Y2));
}
if (left != null) {
Debug.Assert(ret[ret.Count - 1] == new Point(left.X1, left.Y1));
ret.Add(new Point(left.X2, left.Y2));
}
Debug.Assert(ret[0] == ret[ret.Count - 1]);
return ret.Take(ret.Count - 1).ToArray();
}
private void DrawFilth(Graphics canvas, Tile tile, TileEdge edge, int center, int caps)
{
if (center == 0 || edge == null)
return;
var transform = new Matrix();
transform.Translate(tile.X * App.PixelsPerTile + edge.X1 + sliceOverdraw, tile.Y * App.PixelsPerTile + edge.Y1 + sliceOverdraw);
transform.Rotate(edge.Angle);
canvas.Transform = transform;
var length = edge.Length;
if (center != 0) {
var sprite = sprites.LoadFilth(center & 7, (center & 8) != 0, 2 + (tile.X + tile.Y) % 5);
canvas.DrawImage(sprite.Image, new Rectangle(sprite.Hitbox.Left, sprite.Hitbox.Top, length, sprite.Hitbox.Height));
}
if ((caps & 1) != 0) {
var sprite = sprites.LoadFilth(center & 7, (center & 8) != 0, 1);
canvas.DrawImage(sprite.Image, sprite.Hitbox);
}
if ((caps & 2) != 0) {
var sprite = sprites.LoadFilth(center & 7, (center & 8) != 0, 7);
canvas.DrawImage(sprite.Image, new Rectangle(sprite.Hitbox.Left + length, sprite.Hitbox.Top, sprite.Hitbox.Width, sprite.Hitbox.Height));
}
canvas.ResetTransform();
}
