public void UpdateRectangle(PhysicsRectangle a, int Id)
{
if (a.Hit == null)
{
a.Hit = new object[4];
}
PhysicsRectangles[Id] = a;
}
public int AddRectangle(PhysicsRectangle a)
{
if (a.Hit == null)
{
a.Hit = new object[4];
}
return(PhysicsRectangles.Add(a));
}
void BroadPhase(float Delta)
{
PossibleContacts.Clear();
ActualContacts.Clear();
for (int i = 0; i < PhysicsRectangles.Count; i++)
{
PhysicsRectangle a = PhysicsRectangles[i];
for (int j = 0; j < 4; j++)
{
a.Hit[j] = null;
}
PhysicsRectangles[i] = a;
}
for (int i = 0; i < PhysicsRectangles.Count; i++)
{
for (int j = 0; j < PhysicsRectangles.Count; j++)
{
if (i != j)
{
PhysicsRectangle a = PhysicsRectangles[i].Clone();
PhysicsRectangle b = PhysicsRectangles[j].Clone();
float AMinX = Math.Min(a.X, a.X + (a.VelX * Delta));
float AMinY = Math.Min(a.Y, a.Y + (a.VelY * Delta));
float AMaxX = Math.Max(a.X + a.SizeX, a.X + a.SizeX + (a.VelX * Delta));
float AMaxY = Math.Max(a.Y + a.SizeY, a.Y + a.SizeY + (a.VelY * Delta));
float BMinX = Math.Min(b.X, b.X + (b.VelX * Delta));
float BMinY = Math.Min(b.Y, b.Y + (b.VelY * Delta));
float BMaxX = Math.Max(b.X + b.SizeX, b.X + b.SizeX + (b.VelX * Delta));
float BMaxY = Math.Max(b.Y + b.SizeY, b.Y + b.SizeY + (b.VelY * Delta));
a.SizeX = Math.Abs(AMaxX - AMinX);
a.SizeY = Math.Abs(AMaxY - AMinY);
a.X = AMinX;
a.Y = AMinY;
b.SizeX = Math.Abs(BMaxX - BMinX);
b.SizeY = Math.Abs(BMaxY - BMinY);
b.X = BMinX;
b.Y = BMinY;
if (CollisionUtils.RectangleIntersect(a, b))
{
PossibleContacts.Add(new Tuple <int, int>(i, j));
}
}
}
}
}
void UpdatePosition(float Delta)
{
for (int i = 0; i < PhysicsRectangles.Count; i++)
{
PhysicsRectangle a = PhysicsRectangles[i];
if (a.Mass > 0)
{
a.X = a.X + (a.VelX * Delta);
a.Y = a.Y + (a.VelY * Delta);
if (a.Hit[(int)Direction.Down] == null)
{
a.VelX += (GravityX * Delta);
a.VelY += (GravityY * Delta);
}
else
{
a.VelX *= a.Friction;
a.VelY *= a.Friction;
}
}
PhysicsRectangles[i] = a;
}
}
void NarrowPhase(float Delta)
{
for (int i = 0; i < PossibleContacts.Count; i++)
{
PhysicsRectangle a = PhysicsRectangles[PossibleContacts[i].Item1];
PhysicsRectangle b = PhysicsRectangles[PossibleContacts[i].Item2];
Contact c = CollisionUtils.RectangleVSRectangle(a, b, Delta);
//Console.WriteLine($"Contact: {c.Collided} Normal: x:{c.NX} y:{c.NY} ContactPoint: x:{c.X} y:{c.Y} ContactTime: {c.TimeOfContact}");
if (c.Collided)
{
if (c.TimeOfContact >= 1)
{
continue;
}
if (c.NX < 0)
{
a.Hit[(int)Direction.Right] = PhysicsRectangles[PossibleContacts[i].Item2].Parent;
}
else
{
a.Hit[(int)Direction.Right] = null;
}
if (c.NX > 0)
{
a.Hit[(int)Direction.Left] = PhysicsRectangles[PossibleContacts[i].Item2].Parent;
}
else
{
a.Hit[(int)Direction.Left] = null;
}
if (c.NY < 0)
{
a.Hit[(int)Direction.Down] = PhysicsRectangles[PossibleContacts[i].Item2].Parent;
}
else
{
a.Hit[(int)Direction.Down] = null;
}
if (c.NY > 0)
{
a.Hit[(int)Direction.Up] = PhysicsRectangles[PossibleContacts[i].Item2].Parent;
}
else
{
a.Hit[(int)Direction.Up] = null;
}
a.VelX += c.NX * Math.Abs(a.VelX) * (1 - c.TimeOfContact);
a.VelY += c.NY * Math.Abs(a.VelY) * (1 - c.TimeOfContact);
PhysicsRectangles[PossibleContacts[i].Item1] = a;
ActualContacts.Add(c);
}
else
{
PossibleContacts.RemoveAt(i);
}
}
}