/// <summary>
/// Removes c from the list of immediate children of this LinkNode.
/// If c was not a child, then no action is taken.
/// </summary>
/// <param name="c"></param>
public void AbandonChild(LinkNode c)
{
if (this == c.Parent)
{
Children.Remove(c);
c.Parent = null;
}
}
/// <summary>
/// Adds c as a child of this LinkNode. The current spatial relatitionship between c and the LinkNode
/// will be maintained. If c already had a parent, c will be removed from this other parent's list of children.
/// </summary>
/// <param name="c"></param>
public void AddAsChild(LinkNode c)
{
// If c was already part of a structure, have it removed first
// This prevents loops and keeps the integrity of hte Children lists
if (c.Parent != null)
c.AbandonParent();
c.Parent = this;
Children.Add(c);
WorldMatPrev = WorldMat;
WorldMatRotPrev = WorldMatRot;
WorldMatPosPrev = WorldMatPos;
}
/// <summary>
/// Adds c as a child of this LinkNode. The LinkNode c is first moved relative to its new parent
/// according to RelativeMat. If c already had a parent, c will be removed from this other parent's list of children.
/// </summary>
/// <param name="c"></param>
/// <param name="RelativeMat"></param>
public void AddAsChild(LinkNode c, Matrix RelativeMat)
{
c.WorldMat = Matrix.CreateScale(c.WorldMatScale)
//* Matrix.CreateFromQuaternion(WorldMatRot)
* Matrix.Transform(RelativeMat, WorldMatRot)
* Matrix.CreateTranslation(WorldMatPos);
c.AdjustChidren(WorldMatPos, c.WorldMatRot / c.WorldMatRotPrev, c.WorldMatPos - c.WorldMatPosPrev);
c.WorldMatPrev = c.WorldMat;
c.WorldMatRotPrev = c.WorldMatRot;
c.WorldMatPosPrev = c.WorldMatPos;
AddAsChild(c);
}
/// <summary>
/// Sets p as Parent of this LinkNode. The LinkNode is first moved relative to its new parent
/// according to RelativeMat. If there was already a parent, this linknode is
/// removed from that parent's list of children.
/// </summary>
/// <param name="p"></param>
/// <param name="RelativeMat"></param>
public void SetAsParent(LinkNode p, Matrix RelativeMat)
{
p.AddAsChild(this, RelativeMat);
}
/// <summary>
/// Sets p as Parent of this LinkNode. The current spatial relatitionship between p and the LinkNode
/// will be maintained. If there was already a parent, this linknode is
/// removed from that parent's list of children.
/// </summary>
/// <param name="p"></param>
public void SetAsParent(LinkNode p)
{
p.AddAsChild(this);
}