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feat: Parent Change Propagation to Children

This commit is contained in:
Syntriax 2024-02-06 12:15:45 +03:00
parent 14e3337daa
commit 3902f1caca
1 changed files with 10 additions and 0 deletions
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10
Engine.Core/Transform.cs
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@ -133,6 +133,7 @@ public class Transform : ITransform
Parent.OnPositionChanged -= RecalculatePosition;
Parent.OnScaleChanged -= RecalculateScale;
Parent.OnRotationChanged -= RecalculateRotation;
Parent.OnParentChanged -= NotifyChildrenOnParentChange;
}
Parent = transform;
@ -143,6 +144,7 @@ public class Transform : ITransform
transform.OnPositionChanged += RecalculatePosition;
transform.OnScaleChanged += RecalculateScale;
transform.OnRotationChanged += RecalculateRotation;
transform.OnParentChanged += NotifyChildrenOnParentChange;
}
UpdateLocalPosition();
@ -174,6 +176,14 @@ public class Transform : ITransform
public IEnumerator<ITransform> GetEnumerator() => _children.GetEnumerator();
IEnumerator IEnumerable.GetEnumerator() => _children.GetEnumerator();
private void NotifyChildrenOnParentChange(ITransform transform, ITransform? previousParent)
{
// TODO No idea how logical this is to propagate this to the children the way I'm doing right now.
// I was originally gonna just call `child.OnParentChanged?.Invoke(child, child.Parent);` but seems an unnecessary call too?
foreach (var child in Children)
child.OnParentChanged?.Invoke(transform, previousParent);
}
private void RecalculatePosition(ITransform _)
{
if (Parent is null)