private void GetNeighborBlocks(LineSegment line, IEnumerable <Block> blocks, out Block blockX, out Block blockY, out Orientation orientation)
{
blockX = null;
blockY = null;
orientation = Orientation.Other;
foreach (var block in blocks)
{
var found = false;
var blockLines = Polygon.GetBlockLines(block, Layer).Where(item => item.IsSlope);
foreach (var lineObstacle in blockLines)
{
if (line.Start == lineObstacle.Start && line.End == lineObstacle.End)
{
found = true;
}
else if (line.End == lineObstacle.Start && line.Start == lineObstacle.End)
{
found = true;
}
if (found)
{
break;
}
}
if (!found)
{
continue;
}
if (blockX == null)
{
blockX = block;
}
else
{
blockY = block;
//ok, we have both blocks
var isVertical = line.Direction == Direction.Down || line.Direction == Direction.Up;
var isHorizontal = line.Direction == Direction.Left || line.Direction == Direction.Right;
if (isVertical)
{
orientation = Orientation.Vertical;
if (blockX.Position.X < blockY.Position.X)
{
return;
}
}
if (isHorizontal)
{
orientation = Orientation.Horizontal;
if (blockX.Position.Y < blockY.Position.Y)
{
return;
}
}
var blockTemp = blockX;
blockX = blockY;
blockY = blockTemp;
return;
}
}
}
