public void SetParent(Node parent)
{
if (this.parent != null)
this.parent.children.Remove(this);
this.parent = parent;
if (parent != null)
parent.children.Add(this);
}
public static bool CheckQuad(Node nodeA, Node nodeB)
{
if ((nodeA.Position.X + nodeA.Sprite.Width < 800 && nodeB.Position.X < 800
|| nodeB.Position.X + nodeB.Sprite.Width < 800 && nodeA.Position.X < 800) ||
(nodeA.Position.X + nodeA.Sprite.Width >= 800 && nodeB.Position.X >= 800
|| nodeB.Position.X + nodeB.Sprite.Width >= 800 && nodeA.Position.X >= 800))
{
if ((nodeA.Position.Y + nodeA.Sprite.Height < 480 && nodeB.Position.Y < 480
|| nodeB.Position.Y + nodeB.Sprite.Height < 480 && nodeA.Position.Y < 480) ||
(nodeA.Position.Y + nodeA.Sprite.Height >= 480 && nodeB.Position.Y >= 480
|| nodeB.Position.Y + nodeB.Sprite.Height >= 480 && nodeA.Position.Y >= 480))
{
if (Vector2.Distance(nodeA.Position, nodeB.Position) < (nodeA.Sprite.Width / 2 + nodeB.Sprite.Width / 2))
return true;
else
return false;
}
else
return false;
}
else
return false;
}
public static bool CheckCollision(Node nodeA, Node nodeB)
{
line = nodeB.Position - nodeA.Position;
// we use LengthSquared to avoid a costly square-root call
return (line.LengthSquared() <= (nodeA.Sprite.Width / 2 + nodeB.Sprite.Width / 2) * (nodeA.Sprite.Width / 2 + nodeB.Sprite.Width / 2));
//if(CheckQuad(nodeA, nodeB))
//{
//if (Vector2.Distance(nodeA.Position, nodeB.Position) < (nodeA.Sprite.Width / 2 + nodeB.Sprite.Width / 2))
// return true;
// else
// return false;
//}
//else
// return false;
//if ((nodeA.position.X + nodeA.Sprite.Width < 800 && nodeB.position.X < 800
// || nodeB.position.X + nodeB.Sprite.Width < 800 && nodeA.position.X < 800) ||
// (nodeA.position.X + nodeA.Sprite.Width >= 800 && nodeB.position.X >= 800
// || nodeB.position.X + nodeB.Sprite.Width >= 800 && nodeA.position.X >= 800))
//{
// if ((nodeA.position.Y + nodeA.Sprite.Height < 480 && nodeB.position.Y < 480
// || nodeB.position.Y + nodeB.Sprite.Height < 480 && nodeA.position.Y < 480) ||
// (nodeA.position.Y + nodeA.Sprite.Height >= 480 && nodeB.position.Y >= 480
// || nodeB.position.Y + nodeB.Sprite.Height >= 480 && nodeA.position.Y >= 480))
// {
// if (Vector2.Distance(nodeA.position, nodeB.position) < (nodeA.Sprite.Width / 2 + nodeB.Sprite.Width / 2))
// return true;
// else
// return false;
// }
// else
// return false;
//}
//else
// return false;
//if (CheckQuad(nodeA, nodeB))
//{
// Rectangle collisionRect = Intersect(nodeA.Bounds, nodeB.Bounds);
// if (collisionRect == Rectangle.Empty)
// return false;
// int pixelCount = collisionRect.Width * collisionRect.Height;
// Color[] pixelsA = new Color[pixelCount];
// Color[] pixelsB = new Color[pixelCount];
// //GraphicsDevice.Textures[0] = null;
// nodeA.Sprite.Texture.GetData<Color>(0, nodeA.NormalizeBounds(collisionRect), pixelsA, 0, pixelCount);
// nodeB.Sprite.Texture.GetData<Color>(0, nodeB.NormalizeBounds(collisionRect), pixelsB, 0, pixelCount);
// for (int i = 0; i < pixelCount; i++)
// {
// if (pixelsA[i].A > ALPHA_THRESHOLD && pixelsB[i].A > ALPHA_THRESHOLD)
// return true;
// }
// return false;
//}
//else
// return false;
}
public void Bounce(Node node1, Node node2)
{
Vector2 cOfMass = (node1.Velocity + node2.Velocity) / 2;
Vector2 normal1 = node2.Position - node1.Position;
normal1.Normalize();
Vector2 normal2 = node1.Position - node2.Position;
normal2.Normalize();
node1.Velocity -= cOfMass;
node1.Velocity = Vector2.Reflect(node1.Velocity, normal1);
node1.Velocity += cOfMass;
node2.Velocity -= cOfMass;
node2.Velocity = Vector2.Reflect(node2.Velocity, normal2);
node2.Velocity += cOfMass;
}