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