// Create a random slice inside the QuadTree boundary
public bool RandomSlice(int numTry, int maxTries, ref XY output)
{
if (numTry > maxTries)
{
return(false);
}
// Get a random slice point
float sliceX = Mathf.Round(Random.Range(boundary.Left(), boundary.Right()));
float sliceY = Mathf.Round(Random.Range(boundary.Bottom(), boundary.Top()));
// Check if we can fit 4 rooms using that slice, if not just try again until maxTries
if (Mathf.Abs(sliceX - boundary.Left()) < roomRealMinSize)
{
return(RandomSlice(numTry + 1, maxTries, ref output));
}
if (Mathf.Abs(boundary.Right() - sliceX) < roomRealMinSize)
{
return(RandomSlice(numTry + 1, maxTries, ref output));
}
if (Mathf.Abs(boundary.Top() - sliceY) < roomRealMinSize)
{
return(RandomSlice(numTry + 1, maxTries, ref output));
}
if (Mathf.Abs(sliceY - boundary.Bottom()) < roomRealMinSize)
{
return(RandomSlice(numTry + 1, maxTries, ref output));
}
output = new XY(sliceX, sliceY);
return(true);
}
/// <summary>
/// Tries to create a random room inside a given box.
/// It lefts at least one tile between the box and the room
/// </summary>
/// <param name="boundaries">The box where to create the new room</param>
/// <returns>A new Room or null if the boundaries is too small</returns>
public static Room CreateRandomRoom(AABB boundaries)
{
if (boundaries.half.x < Dungeon.MIN_ROOM_HALFSIZE + Dungeon.MIN_ROOM_MARGIN || boundaries.half.y < Dungeon.MIN_ROOM_HALFSIZE + Dungeon.MIN_ROOM_MARGIN)
{
return(null);
}
int maxSizeX = Mathf.Min(boundaries.half.x - Dungeon.MIN_ROOM_MARGIN, Dungeon.MAX_ROOM_HALFSIZE);
int maxSizeY = Mathf.Min(boundaries.half.y - Dungeon.MIN_ROOM_MARGIN, Dungeon.MAX_ROOM_HALFSIZE);
// Create random width
int width = Random.Range(Dungeon.MIN_ROOM_HALFSIZE, maxSizeX);
int height = Random.Range(Dungeon.MIN_ROOM_HALFSIZE, maxSizeY);
// We don't want the room to go outside the box
int maxx = boundaries.Right() - width - (Dungeon.MIN_ROOM_MARGIN - 1);
int minx = boundaries.Left() + width + Dungeon.MIN_ROOM_MARGIN;
int miny = boundaries.Bottom() + height + Dungeon.MIN_ROOM_MARGIN;
int maxy = boundaries.Top() - height - (Dungeon.MIN_ROOM_MARGIN - 1);
// Create random center
int x = Random.Range(minx, maxx);
int y = Random.Range(miny, maxy);
return(new Room(new XY(x, y), new XY(width, height)));
}
/// <summary>
/// Recursively creates the tree by adding the child nodes
/// </summary>
/// <param name="currentDepth">The current depth of the tree</param>
/// <param name="maxDepth">The max depth the tree can have</param>
public void BuildTree(int currentDepth, int maxDepth)
{
// We want to stop if we have reached the max depth
if (currentDepth > maxDepth)
{
return;
}
// Or if it is not possible to store 4 rooms in the space
XY wh = _box.half / 2;
if (wh.x < Dungeon.MIN_ROOM_HALFSIZE + 2 * Dungeon.MIN_ROOM_MARGIN || wh.y < Dungeon.MIN_ROOM_HALFSIZE + 2 * Dungeon.MIN_ROOM_MARGIN)
{
return;
}
// Make sure they are even numbers
int x = _box.Left() + 2 * Random.Range(Dungeon.MIN_ROOM_HALFSIZE + Dungeon.MIN_ROOM_MARGIN, _box.half.x - Dungeon.MIN_ROOM_HALFSIZE - Dungeon.MIN_ROOM_MARGIN);
int y = _box.Bottom() + 2 * Random.Range(Dungeon.MIN_ROOM_HALFSIZE + Dungeon.MIN_ROOM_MARGIN, _box.half.y - Dungeon.MIN_ROOM_HALFSIZE - Dungeon.MIN_ROOM_MARGIN);
// The half sizes
int left = (x - _box.Left()) / 2;
int right = (_box.Right() - x) / 2;
int up = (_box.Top() - y) / 2;
int down = (y - _box.Bottom()) / 2;
// Creating each trees and build them
_northWest = new Quadtree(new AABB(new XY(x - left, y + up), new XY(left, up)));
_northWest.BuildTree(currentDepth + 1, maxDepth);
_northEast = new Quadtree(new AABB(new XY(x + right, y + up), new XY(right, up)));
_northEast.BuildTree(currentDepth + 1, maxDepth);
_southWest = new Quadtree(new AABB(new XY(x - left, y - down), new XY(left, down)));
_southWest.BuildTree(currentDepth + 1, maxDepth);
_southEast = new Quadtree(new AABB(new XY(x + right, y - down), new XY(right, down)));
_southEast.BuildTree(currentDepth + 1, maxDepth);
}