public Quad(QuadRoot tree, Quad parent, Rectangle rectangle)
{
this.tree = tree;
this.parent = parent;
this.rectangle = rectangle;
this.imageX = this.rectangle.X / this.rectangle.Width;
this.imageY = this.rectangle.Y / this.rectangle.Height;
// Console.Out.WriteLine("Creating quad with " + this.rectangle + " this.GetDepth() = " + this.GetDepth() + ", maxDepth = " + tree.depth);
if (this.GetDepth() == tree.depth)
{
this.isLeaf = true;
tree.leafList.AddLast(this);
if (tree.collisionMap.game != null)
{
if (!tree.collisionMap.drawMode)
{
this.collisionTexture = new CollisionTexture(this, tree.collisionMap.game.Content.Load<Texture2D>
(tree.collisionMap.collisionMapPath + "/" + tree.collisionMap.collisionMapName + "_" + imageX + "_" + imageY));
}
else this.collisionTexture = new CollisionTexture(this, new Texture2D(tree.collisionMap.graphicsDevice,
this.rectangle.Width, this.rectangle.Height));
}
else
{
this.collisionTexture = new CollisionTexture(this, new Texture2D(tree.collisionMap.graphicsDevice,
this.rectangle.Width, this.rectangle.Height));
}
}
}
public static QuadRoot Quad(double yminus, double yzero, double yplus)
{
//Finds a parabola through three points
// (-1,yminus), (0,yzero), (1,yplus)
// that do not lie on a straight line.
double a, b, c, dis, dx;
QuadRoot qr = new QuadRoot();
qr.nz = 0;
a = 0.5 * (yminus + yplus) - yzero;
b = 0.5 * (yplus - yminus);
c = yzero;
qr.xe = -b / (2 * a);
qr.ye = ((a * qr.xe + b) * qr.xe) + c;
dis = Math.Pow(b, 2) - (4 * a * c);
if (dis >= 0)
{
dx = 0.5 * Math.Sqrt(dis) / Math.Abs(a);
qr.zero1 = qr.xe - dx;
qr.zero2 = qr.xe + dx;
if (Math.Abs(qr.zero1) <= 1)
{
qr.nz = qr.nz + 1;
}
if (Math.Abs(qr.zero2) <= 1)
{
qr.nz = qr.nz + 1;
}
if (qr.zero1 < -1)
{
qr.zero1 = qr.zero2;
}
}
return(qr);
}
