public static FBBody CreateCircle(float radius, Vector2 offset)
{
var body = new FBBody();
body.collider = new FBCircle(radius, offset);
return(body);
}
public static FBBody CreatePolygon(List <Vector2> points)
{
var body = new FBBody();
FBPolygon collider = new FBPolygon();
points.ForEach(x => collider.AddPoint(x.X, x.Y));
body.collider = collider;
return(body);
}
private FBQuadTreeNode GetValidSubNode(FBBody body)
{
foreach (var subNode in subNodes)
{
if (subNode.bounds.Contains(body.AABB))
{
return(subNode);
}
}
return(null);
}
public static FBBody CreateRectangle(float width, float height, bool centered)
{
var body = new FBBody();
if (centered)
{
body.collider = new FBRectangle(-width / 2, -height / 2, width / 2, height / 2);
}
else
{
body.collider = new FBRectangle(0, 0, width, height);
}
return(body);
}
private static List <CollisionInfo> GetPairsForBody(FBBody firstBody)
{
List <CollisionInfo> pairs = new List <CollisionInfo>();
var x = firstBody.AABB.Left;
var y = firstBody.AABB.Top;
var x2 = firstBody.AABB.Right;
var y2 = firstBody.AABB.Bottom;
if (firstBody.MovementX >= 0)
{
x2 += (int)firstBody.MovementX;
}
else
{
x -= (int)firstBody.MovementX;
}
if (firstBody.MovementY >= 0)
{
y2 += (int)firstBody.MovementY;
}
else
{
y -= (int)firstBody.MovementY;
}
var sweptAABB = new Rectangle(x, y, x2 - x, y2 - y);
var potentials = bodiesHash.GetRectangle(sweptAABB);
foreach (var p in potentials)
{
if (p != firstBody)
{
pairs.Add(new CollisionInfo()
{
BodyA = firstBody, BodyB = p
});
}
}
return(pairs);
}
public void AddBody(FBBody body)
{
if (subNodes == null)
{
bodies.Add(body);
if (bodies.Count >= capacity && level != maxLevel)
{
Split();
int i = 0;
while (i < bodies.Count)
{
var subNode = GetValidSubNode(bodies[i]);
if (subNode != null)
{
subNode.AddBody(bodies[i]);
bodies.RemoveAt(i);
}
else
{
i++;
}
}
}
}
else
{
var subnode = GetValidSubNode(body);
if (subnode != null)
{
subnode.AddBody(body);
}
else
{
bodies.Add(body);
}
}
}
public static void AddBody(FBBody body)
{
bodies.Add(body);
}
public List <FBBody> Nearby(FBBody body)
{
return(null);
}
public void AddBody(FBBody body)
{
mainNode.AddBody(body);
}