public Block(Street streetEast, Street streetSouth, Street streetWest, Street streetNorth,
Intersection southEast, Intersection southWest, Intersection northEast, Intersection northWest)
{
this.SouthEast = southEast;
this.SouthWest = southWest;
this.NorthEast = northEast;
this.NorthWest = northWest;
this.Children = new List<Block>(4);
this.streets = new[] { streetEast, streetSouth, streetWest, streetNorth };
this.East = streetEast.Intersections[0].Position.X;
this.West = streetWest.Intersections[0].Position.X;
this.South = streetSouth.Intersections[0].Position.Y;
this.North = streetNorth.Intersections[0].Position.Y;
this.Width = this.East - this.West;
this.Height = this.North - this.South;
}
public static Block MakeRoot(float width, float height)
{
var x = width / 2;
var y = height / 2;
var streetWidth = 5.U();
var i00 = new Intersection(-x, -y);
var i10 = new Intersection(x, -y);
var i01 = new Intersection(-x, y);
var i11 = new Intersection(x, y);
var sEast = new Street(i11, i10, streetWidth);
var sSouth = new Street(i10, i00, streetWidth);
var sWest = new Street(i00, i01, streetWidth);
var sNorth = new Street(i01, i11, streetWidth);
return(new Block(
sEast, sSouth, sWest, sNorth,
i10, i00, i11, i01
));
}
private void splitCross(Block block)
{
Unit streetWidthNS, streetWidthEW;
var x = this.divide(block.East, block.West, out streetWidthEW);
var y = this.divide(block.South, block.North, out streetWidthNS);
var nodeCenter = new Intersection(x, y);
var nodeEast = new Intersection(block.East, y);
var nodeWest = new Intersection(block.West, y);
var nodeSouth = new Intersection(x, block.South);
var nodeNorth = new Intersection(x, block.North);
var streetEast = block[Block.Side.East];
var streetWest = block[Block.Side.West];
var streetSouth = block[Block.Side.South];
var streetNorth = block[Block.Side.North];
streetEast.AddIntersection(nodeEast);
streetWest.AddIntersection(nodeWest);
streetSouth.AddIntersection(nodeSouth);
streetNorth.AddIntersection(nodeNorth);
var streetToEast = new Street(nodeCenter, nodeEast, streetWidthEW);
var streetToWest = new Street(nodeCenter, nodeWest, streetWidthEW);
var streetToSouth = new Street(nodeCenter, nodeSouth, streetWidthNS);
var streetToNorth = new Street(nodeCenter, nodeNorth, streetWidthNS);
var childSE = new Block(streetEast, streetSouth, streetToSouth, streetToEast, block.SouthEast, nodeSouth, nodeEast, nodeCenter);
var childSW = new Block(streetToSouth, streetSouth, streetWest, streetToWest, nodeSouth, block.SouthWest, nodeCenter, nodeWest);
var childNE = new Block(streetToNorth, streetToWest, streetWest, streetNorth, nodeCenter, nodeWest, nodeNorth, block.NorthWest);
var childNW = new Block(streetEast, streetToEast, streetToNorth, streetNorth, nodeEast, nodeCenter, block.NorthEast, nodeNorth);
block.Children.Add(childSE);
block.Children.Add(childSW);
block.Children.Add(childNE);
block.Children.Add(childNW);
}
private void splitNorthSouth(Block block)
{
Unit streetWidth;
var x = this.divide(block.East, block.West, out streetWidth);
var nodeSouth = new Intersection(x, block.South);
var nodeNorth = new Intersection(x, block.North);
var streetEast = block[Block.Side.East];
var streetWest = block[Block.Side.West];
var streetSouth = block[Block.Side.South];
var streetNorth = block[Block.Side.North];
streetSouth.AddIntersection(nodeSouth);
streetNorth.AddIntersection(nodeNorth);
var streetSplit = new Street(nodeSouth, nodeNorth, streetWidth);
var childE = new Block(streetEast, streetSouth, streetSplit, streetNorth, block.SouthEast, nodeSouth, block.NorthEast, nodeNorth);
var childW = new Block(streetSplit, streetSouth, streetWest, streetNorth, nodeSouth, block.SouthWest, nodeNorth, block.NorthWest);
block.Children.Add(childE);
block.Children.Add(childW);
}
private void splitEastWest(Block block)
{
Unit streetWidth;
var y = this.divide(block.South, block.North, out streetWidth);
var nodeEast = new Intersection(block.East, y);
var nodeWest = new Intersection(block.West, y);
var streetEast = block[Block.Side.East];
var streetWest = block[Block.Side.West];
var streetSouth = block[Block.Side.South];
var streetNorth = block[Block.Side.North];
streetEast.AddIntersection(nodeEast);
streetWest.AddIntersection(nodeWest);
var streetSplit = new Street(nodeEast, nodeWest, streetWidth);
var childS = new Block(streetEast, streetSouth, streetWest, streetSplit, block.SouthEast, block.SouthWest, nodeEast, nodeWest);
var childN = new Block(streetEast, streetSplit, streetWest, streetNorth, nodeEast, nodeWest, block.NorthEast, block.NorthWest);
block.Children.Add(childS);
block.Children.Add(childN);
}
private void splitNorthSouth(Block block)
{
Unit streetWidth;
var x = this.divide(block.East, block.West, out streetWidth);
var nodeSouth = new Intersection(x, block.South);
var nodeNorth = new Intersection(x, block.North);
var streetEast = block[Block.Side.East];
var streetWest = block[Block.Side.West];
var streetSouth = block[Block.Side.South];
var streetNorth = block[Block.Side.North];
streetSouth.AddIntersection(nodeSouth);
streetNorth.AddIntersection(nodeNorth);
var streetSplit = new Street(nodeSouth, nodeNorth, streetWidth);
var childE = new Block(streetEast, streetSouth, streetSplit, streetNorth, block.SouthEast, nodeSouth, block.NorthEast, nodeNorth);
var childW = new Block(streetSplit, streetSouth, streetWest, streetNorth, nodeSouth, block.SouthWest, nodeNorth, block.NorthWest);
block.Children.Add(childE);
block.Children.Add(childW);
}
private void splitEastWest(Block block)
{
Unit streetWidth;
var y = this.divide(block.South, block.North, out streetWidth);
var nodeEast = new Intersection(block.East, y);
var nodeWest = new Intersection(block.West, y);
var streetEast = block[Block.Side.East];
var streetWest = block[Block.Side.West];
var streetSouth = block[Block.Side.South];
var streetNorth = block[Block.Side.North];
streetEast.AddIntersection(nodeEast);
streetWest.AddIntersection(nodeWest);
var streetSplit = new Street(nodeEast, nodeWest, streetWidth);
var childS = new Block(streetEast, streetSouth, streetWest, streetSplit, block.SouthEast, block.SouthWest, nodeEast, nodeWest);
var childN = new Block(streetEast, streetSplit, streetWest, streetNorth, nodeEast, nodeWest, block.NorthEast, block.NorthWest);
block.Children.Add(childS);
block.Children.Add(childN);
}
private void splitCross(Block block)
{
Unit streetWidthNS, streetWidthEW;
var x = this.divide(block.East, block.West, out streetWidthEW);
var y = this.divide(block.South, block.North, out streetWidthNS);
var nodeCenter = new Intersection(x, y);
var nodeEast = new Intersection(block.East, y);
var nodeWest = new Intersection(block.West, y);
var nodeSouth = new Intersection(x, block.South);
var nodeNorth = new Intersection(x, block.North);
var streetEast = block[Block.Side.East];
var streetWest = block[Block.Side.West];
var streetSouth = block[Block.Side.South];
var streetNorth = block[Block.Side.North];
streetEast.AddIntersection(nodeEast);
streetWest.AddIntersection(nodeWest);
streetSouth.AddIntersection(nodeSouth);
streetNorth.AddIntersection(nodeNorth);
var streetToEast = new Street(nodeCenter, nodeEast, streetWidthEW);
var streetToWest = new Street(nodeCenter, nodeWest, streetWidthEW);
var streetToSouth = new Street(nodeCenter, nodeSouth, streetWidthNS);
var streetToNorth = new Street(nodeCenter, nodeNorth, streetWidthNS);
var childSE = new Block(streetEast, streetSouth, streetToSouth, streetToEast, block.SouthEast, nodeSouth, nodeEast, nodeCenter);
var childSW = new Block(streetToSouth, streetSouth, streetWest, streetToWest, nodeSouth, block.SouthWest, nodeCenter, nodeWest);
var childNE = new Block(streetToNorth, streetToWest, streetWest, streetNorth, nodeCenter, nodeWest, nodeNorth, block.NorthWest);
var childNW = new Block(streetEast, streetToEast, streetToNorth, streetNorth, nodeEast, nodeCenter, block.NorthEast, nodeNorth);
block.Children.Add(childSE);
block.Children.Add(childSW);
block.Children.Add(childNE);
block.Children.Add(childNW);
}
public static Block MakeRoot(float width, float height)
{
var x = width / 2;
var y = height / 2;
var streetWidth = 5.U();
var i00 = new Intersection(-x, -y);
var i10 = new Intersection(x, -y);
var i01 = new Intersection(-x, y);
var i11 = new Intersection(x, y);
var sEast = new Street(i11, i10, streetWidth);
var sSouth = new Street(i10, i00, streetWidth);
var sWest = new Street(i00, i01, streetWidth);
var sNorth = new Street(i01, i11, streetWidth);
return new Block(
sEast, sSouth, sWest, sNorth,
i10, i00, i11, i01
);
}