private static bool GetTopOrBottomEdge(TileEdges edgesToTest, int x, int y, Vector2 tilePosition, ref LineSegment edge)
{
if ((edgesToTest & TileEdges.Bottom) != 0)
{
Tile tile = Main.tile[x, y + 1];
if (IsNeighborSolid(tile) && tile.slope() != 1 && tile.slope() != 2 && !tile.halfBrick())
{
return(false);
}
edge.Start = new Vector2(tilePosition.X, tilePosition.Y + 16f);
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y + 16f);
return(true);
}
if ((edgesToTest & TileEdges.Top) != 0)
{
Tile tile2 = Main.tile[x, y - 1];
if (!Main.tile[x, y].halfBrick() && IsNeighborSolid(tile2) && tile2.slope() != 3 && tile2.slope() != 4)
{
return(false);
}
if (Main.tile[x, y].halfBrick())
{
tilePosition.Y += 8f;
}
edge.Start = new Vector2(tilePosition.X, tilePosition.Y);
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y);
return(true);
}
return(false);
}
private static bool GetClosestEdgeToCircle(Vector2 position, Vector2 size, Vector2 velocity, out Vector2 collisionPoint, out Tile collisionTile)
{
Rectangle tileBounds = GetTileBounds(position, size);
Vector2 vector = position + size * 0.5f;
TileEdges tileEdges = TileEdges.None;
tileEdges = ((!(velocity.Y < 0f)) ? (tileEdges | TileEdges.Top) : (tileEdges | TileEdges.Bottom));
tileEdges = ((!(velocity.X < 0f)) ? (tileEdges | TileEdges.Left) : (tileEdges | TileEdges.Right));
tileEdges = ((!(velocity.Y > velocity.X)) ? (tileEdges | TileEdges.TopRightSlope) : (tileEdges | TileEdges.BottomLeftSlope));
tileEdges = ((!(velocity.Y > 0f - velocity.X)) ? (tileEdges | TileEdges.TopLeftSlope) : (tileEdges | TileEdges.BottomRightSlope));
collisionPoint = Vector2.Zero;
collisionTile = null;
float num = float.MaxValue;
Vector2 closestPointOut = default(Vector2);
float distanceSquaredOut = 0f;
for (int i = tileBounds.Left; i < tileBounds.Right; i++)
{
for (int j = tileBounds.Top; j < tileBounds.Bottom; j++)
{
if (GetCollisionPointForTile(tileEdges, i, j, vector, ref closestPointOut, ref distanceSquaredOut) && !(distanceSquaredOut >= num) && !(Vector2.Dot(velocity, vector - closestPointOut) > 0f))
{
num = distanceSquaredOut;
collisionPoint = closestPointOut;
collisionTile = Main.tile[i, j];
}
}
}
float num2 = size.X / 2f;
return(num < num2 * num2);
}
public TileOrientation(Tile tile, Orientation orientation)
{
Pixels = orientation.Apply(tile.Pixels);
Tile = tile;
Orientation = orientation;
VisualString = string.Join("\n", Pixels);
Name = $"{tile.TileId}+{orientation}";
Edges = new TileEdges(Pixels);
}
private static bool GetSlopeEdge(ref TileEdges edgesToTest, Tile tile, Vector2 tilePosition, ref LineSegment edge)
{
switch (tile.slope())
{
case 0:
return(false);
case 1:
edgesToTest &= (TileEdges.Bottom | TileEdges.Left | TileEdges.BottomLeftSlope);
if ((edgesToTest & TileEdges.BottomLeftSlope) == 0)
{
return(false);
}
edge.Start = tilePosition;
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y + 16f);
return(true);
case 2:
edgesToTest &= (TileEdges.Bottom | TileEdges.Right | TileEdges.BottomRightSlope);
if ((edgesToTest & TileEdges.BottomRightSlope) == 0)
{
return(false);
}
edge.Start = new Vector2(tilePosition.X, tilePosition.Y + 16f);
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y);
return(true);
case 3:
edgesToTest &= (TileEdges.Top | TileEdges.Left | TileEdges.TopLeftSlope);
if ((edgesToTest & TileEdges.TopLeftSlope) == 0)
{
return(false);
}
edge.Start = new Vector2(tilePosition.X, tilePosition.Y + 16f);
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y);
return(true);
case 4:
edgesToTest &= (TileEdges.Top | TileEdges.Right | TileEdges.TopRightSlope);
if ((edgesToTest & TileEdges.TopRightSlope) == 0)
{
return(false);
}
edge.Start = tilePosition;
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y + 16f);
return(true);
default:
return(false);
}
}
public Tile(int tileId, IReadOnlyList <string> pixels, Grid grid)
{
TileId = tileId;
Pixels = pixels;
Grid = grid;
_edges = new TileEdges(pixels);
TileOrientations = Orientation.Permutations
.Select(orientation => new TileOrientation(this, orientation))
.DistinctBy(tileOrientation => tileOrientation.VisualString)
.ToArray();
_outerEdges = new Lazy <IReadOnlyList <string> >(() => _edges.All().Where(Grid.OuterEdges.Contains).ToArray());
}
private static bool GetCollisionPointForTile(TileEdges edgesToTest, int x, int y, Vector2 center, ref Vector2 closestPointOut, ref float distanceSquaredOut)
{
Tile tile = Main.tile[x, y];
if (tile == null || !tile.nactive() || (!Main.tileSolid[tile.type] && !Main.tileSolidTop[tile.type]))
{
return(false);
}
if (!Main.tileSolid[tile.type] && Main.tileSolidTop[tile.type] && tile.frameY != 0)
{
return(false);
}
if (Main.tileSolidTop[tile.type])
{
edgesToTest &= (TileEdges.Top | TileEdges.BottomLeftSlope | TileEdges.BottomRightSlope);
}
Vector2 tilePosition = new Vector2((float)x * 16f, (float)y * 16f);
bool flag = false;
LineSegment edge = default(LineSegment);
if (GetSlopeEdge(ref edgesToTest, tile, tilePosition, ref edge))
{
closestPointOut = ClosestPointOnLineSegment(center, edge);
distanceSquaredOut = Vector2.DistanceSquared(closestPointOut, center);
flag = true;
}
if (GetTopOrBottomEdge(edgesToTest, x, y, tilePosition, ref edge))
{
Vector2 vector = ClosestPointOnLineSegment(center, edge);
float num = Vector2.DistanceSquared(vector, center);
if (!flag || num < distanceSquaredOut)
{
distanceSquaredOut = num;
closestPointOut = vector;
}
flag = true;
}
if (GetLeftOrRightEdge(edgesToTest, x, y, tilePosition, ref edge))
{
Vector2 vector2 = ClosestPointOnLineSegment(center, edge);
float num2 = Vector2.DistanceSquared(vector2, center);
if (!flag || num2 < distanceSquaredOut)
{
distanceSquaredOut = num2;
closestPointOut = vector2;
}
flag = true;
}
return(flag);
}
private static bool GetLeftOrRightEdge(TileEdges edgesToTest, int x, int y, Vector2 tilePosition, ref LineSegment edge)
{
if ((edgesToTest & TileEdges.Left) != 0)
{
Tile tile = Main.tile[x, y];
Tile tile2 = Main.tile[x - 1, y];
if (IsNeighborSolid(tile2) && tile2.slope() != 1 && tile2.slope() != 3 && (!tile2.halfBrick() || tile.halfBrick()))
{
return(false);
}
edge.Start = new Vector2(tilePosition.X, tilePosition.Y);
edge.End = new Vector2(tilePosition.X, tilePosition.Y + 16f);
if (tile.halfBrick())
{
edge.Start.Y += 8f;
}
return(true);
}
if ((edgesToTest & TileEdges.Right) != 0)
{
Tile tile3 = Main.tile[x, y];
Tile tile4 = Main.tile[x + 1, y];
if (IsNeighborSolid(tile4) && tile4.slope() != 2 && tile4.slope() != 4 && (!tile4.halfBrick() || tile3.halfBrick()))
{
return(false);
}
edge.Start = new Vector2(tilePosition.X + 16f, tilePosition.Y);
edge.End = new Vector2(tilePosition.X + 16f, tilePosition.Y + 16f);
if (tile3.halfBrick())
{
edge.Start.Y += 8f;
}
return(true);
}
return(false);
}
record TileRotationData(int Id, bool IsFlipped, int Rotations, TileEdges Edges, int[] Data);