Simon Bouvier-Zappa
5 年前
当前提交
89c7e59d
共有 4 个文件被更改,包括 176 次插入 和 0 次删除
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8Assets/Constraints.meta
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157Assets/Constraints/TwistChain.cs
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11Assets/Constraints/TwistChain.cs.meta
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using System.Collections.Generic; |
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using UnityEditor; |
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using Unity.Collections; |
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namespace UnityEngine.Animations.Rigging |
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{ |
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using Experimental.Animations; |
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[Unity.Burst.BurstCompile] |
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public struct TwistChainJob : IWeightedAnimationJob |
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{ |
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public NativeArray<ReadWriteTransformHandle> chain; |
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public NativeArray<float> steps; |
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public NativeArray<float> weights; |
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public ReadWriteTransformHandle rootTarget; |
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public ReadWriteTransformHandle tipTarget; |
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public FloatProperty jobWeight { get; set; } |
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public void ProcessRootMotion(AnimationStream stream) { } |
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public void ProcessAnimation(AnimationStream stream) |
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{ |
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float w = jobWeight.Get(stream); |
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if (w > 0f) |
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{ |
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// Retrieve root and tip rotation.
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Quaternion rootRotation = rootTarget.GetRotation(stream); |
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Quaternion tipRotation = tipTarget.GetRotation(stream); |
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// Interpolate rotation on chain.
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for (int i = 0; i < chain.Length; ++i) |
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{ |
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chain[i].SetRotation(stream, Quaternion.Lerp(chain[i].GetRotation(stream), Quaternion.Lerp(rootRotation, tipRotation, weights[i]), w)); |
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} |
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// Update position of handles for easier
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rootTarget.SetPosition(stream, chain[0].GetPosition(stream)); |
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tipTarget.SetPosition(stream, chain[chain.Length - 1].GetPosition(stream)); |
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} |
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else |
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{ |
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for (int i = 0; i < chain.Length; ++i) |
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AnimationRuntimeUtils.PassThrough(stream, chain[i]); |
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} |
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} |
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} |
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[System.Serializable] |
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public struct TwistChainData : IAnimationJobData |
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{ |
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public Transform root; |
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public Transform tip; |
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[SyncSceneToStream] public Transform rootTarget; |
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[SyncSceneToStream] public Transform tipTarget; |
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public AnimationCurve curve; |
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bool IAnimationJobData.IsValid() => !(root == null || tip == null || !tip.IsChildOf(root) || rootTarget == null || tipTarget == null || curve == null); |
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void IAnimationJobData.SetDefaultValues() |
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{ |
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// Default values.
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root = null; |
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tip = null; |
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rootTarget = null; |
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tipTarget = null; |
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curve = AnimationCurve.Linear(0f, 0f, 1f, 1f); |
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} |
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} |
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public class TwistChainJobBinder : AnimationJobBinder<TwistChainJob, TwistChainData> |
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{ |
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public override TwistChainJob Create(Animator animator, ref TwistChainData data, Component component) |
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{ |
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// Retrieve chain in-between root and tip transforms.
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List<Transform> chain = new List<Transform>(); |
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Transform tmp = data.tip; |
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while (tmp != data.root) |
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{ |
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chain.Add(tmp); |
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tmp = tmp.parent; |
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} |
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chain.Add(data.root); |
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chain.Reverse(); |
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// Build Job.
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var job = new TwistChainJob(); |
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job.chain = new NativeArray<ReadWriteTransformHandle>(chain.Count, Allocator.Persistent, NativeArrayOptions.UninitializedMemory); |
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job.steps = new NativeArray<float>(chain.Count, Allocator.Persistent, NativeArrayOptions.UninitializedMemory); |
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job.weights = new NativeArray<float>(chain.Count, Allocator.Persistent, NativeArrayOptions.UninitializedMemory); |
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job.rootTarget = ReadWriteTransformHandle.Bind(animator, data.rootTarget); |
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job.tipTarget = ReadWriteTransformHandle.Bind(animator, data.tipTarget); |
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for (int i = 0; i < chain.Count; ++i) |
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{ |
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job.chain[i] = ReadWriteTransformHandle.Bind(animator, chain[i]); |
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} |
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// Extract lengths from chain.
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float totalLength = 0f; |
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float[] lengths = new float[chain.Count]; |
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lengths[0] = 0f; |
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for (int i = 1; i < chain.Count; ++i) |
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{ |
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lengths[i] = chain[i].localPosition.magnitude; |
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totalLength += lengths[i]; |
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} |
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// Evaluate weights and steps based on curve.
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float cumulativeLength = 0.0f; |
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for (int i = 0; i < lengths.Length; ++i) |
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{ |
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cumulativeLength += lengths[i]; |
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float t = cumulativeLength / totalLength; |
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job.steps[i] = t; |
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job.weights[i] = Mathf.Clamp01(data.curve.Evaluate(t)); |
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} |
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return job; |
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} |
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public override void Destroy(TwistChainJob job) |
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{ |
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job.chain.Dispose(); |
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job.weights.Dispose(); |
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job.steps.Dispose(); |
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} |
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public override void Update(TwistChainJob job, ref TwistChainData data) |
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{ |
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// Update weights based on curve.
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for (int i = 0; i < job.weights.Length; ++i) |
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{ |
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job.weights[i] = Mathf.Clamp01(data.curve.Evaluate(job.steps[i])); |
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} |
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} |
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} |
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[DisallowMultipleComponent, AddComponentMenu("SIGGRAPH 2019/Twist Chain")] |
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public class TwistChain : RigConstraint< |
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TwistChainJob, |
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TwistChainData, |
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TwistChainJobBinder |
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> |
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{ |
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} |
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} |
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fileFormatVersion: 2 |
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guid: f4fcd34ca23da4161af706723275104f |
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MonoImporter: |
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externalObjects: {} |
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serializedVersion: 2 |
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defaultReferences: [] |
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executionOrder: 0 |
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icon: {instanceID: 0} |
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userData: |
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