72 lines
2.1 KiB
C#
72 lines
2.1 KiB
C#
using UnityEngine.Scripting.APIUpdating;
|
|
|
|
namespace UnityEngine.U2D.IK
|
|
{
|
|
/// <summary>
|
|
/// General utilities for 2D IK.
|
|
/// </summary>
|
|
[MovedFrom("UnityEngine.Experimental.U2D.IK")]
|
|
public class IKUtility
|
|
{
|
|
/// <summary>
|
|
/// Check if a transform is a descendent of another transform.
|
|
/// </summary>
|
|
/// <param name="transform">Transforms to check.</param>
|
|
/// <param name="ancestor">Transform's ancestor.</param>
|
|
/// <returns>Returns true if the transform is a descendent. False otherwise.</returns>
|
|
public static bool IsDescendentOf(Transform transform, Transform ancestor)
|
|
{
|
|
Debug.Assert(transform != null, "Transform is null");
|
|
|
|
Transform currentParent = transform.parent;
|
|
|
|
while (currentParent)
|
|
{
|
|
if (currentParent == ancestor)
|
|
return true;
|
|
|
|
currentParent = currentParent.parent;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the depth of the transform's hierarchy.
|
|
/// </summary>
|
|
/// <param name="transform">Transform to check.</param>
|
|
/// <returns>Integer value for hierarchy depth.</returns>
|
|
public static int GetAncestorCount(Transform transform)
|
|
{
|
|
Debug.Assert(transform != null, "Transform is null");
|
|
|
|
int ancestorCount = 0;
|
|
|
|
Transform parent = transform.parent;
|
|
while (parent && parent.GetComponent<IKManager2D>() == null)
|
|
{
|
|
++ancestorCount;
|
|
|
|
parent = parent.parent;
|
|
}
|
|
|
|
return ancestorCount;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the maximum chain count for a IKChain2D.
|
|
/// </summary>
|
|
/// <param name="chain">IKChain2D to query.</param>
|
|
/// <returns>Integer value for the maximum chain count.</returns>
|
|
public static int GetMaxChainCount(IKChain2D chain)
|
|
{
|
|
int maxChainCount = 0;
|
|
|
|
if (chain.effector)
|
|
maxChainCount = GetAncestorCount(chain.effector) + 1;
|
|
|
|
return maxChainCount;
|
|
}
|
|
}
|
|
}
|