Add copy location step 1 scene + constraint

Assets/Constraints/CopyLocationStep1.cs

+using UnityEngine;
+using UnityEngine.Animations.Rigging;
+using UnityEngine.Experimental.Animations;
+using Unity.Burst;
+using Unity.Mathematics;
+
+[BurstCompile]
+public struct CopyLocationStep1Job : IWeightedAnimationJob
+{
+    public ReadWriteTransformHandle constrained;
+    public ReadOnlyTransformHandle  source;
+
+    // TODO : Update mask so it is dynamic
+    public float3 invertMask;
+
+    public FloatProperty jobWeight { get; set; }
+
+    public void ProcessRootMotion(AnimationStream stream) { }
+
+    public void ProcessAnimation(AnimationStream stream)
+    {
+        float w = jobWeight.Get(stream);
+        if (w > 0f)
+        {
+            constrained.SetPosition(
+                stream,
+                math.lerp(constrained.GetPosition(stream), source.GetPosition(stream) * invertMask, w)
+                );
+        }
+    }
+}
+
+[System.Serializable]
+public struct CopyLocationStep1Data : IAnimationJobData
+{
+    public Transform constrainedObject;
+    [SyncSceneToStream] public Transform sourceObject;
+
+    // TODO : Update fields to make these dynamic
+    public bool xInvert;
+    public bool yInvert;
+    public bool zInvert;
+
+    public bool IsValid()
+    {
+        return !(constrainedObject == null || sourceObject == null);
+    }
+
+    public void SetDefaultValues()
+    {
+        constrainedObject = null;
+        sourceObject = null;
+        xInvert = yInvert = zInvert = true;
+    }
+}
+
+public class CopyLocationStep1Binder : AnimationJobBinder<CopyLocationStep1Job, CopyLocationStep1Data>
+{
+    public override CopyLocationStep1Job Create(Animator animator, ref CopyLocationStep1Data data, Component component)
+    {
+        return new CopyLocationStep1Job()
+        {
+            constrained = ReadWriteTransformHandle.Bind(animator, data.constrainedObject),
+            source = ReadOnlyTransformHandle.Bind(animator, data.sourceObject),
+
+            // TODO : Bind data to stream so it becomes dynamic
+            invertMask = new float3(data.xInvert ? -1f : 1f, data.yInvert ? -1f : 1f, data.zInvert ? -1f : 1f)
+        };
+    }
+
+    public override void Destroy(CopyLocationStep1Job job) { }
+}
+
+[DisallowMultipleComponent, AddComponentMenu("SIGGRAPH 2019/Copy Location (Step 1)")]
+public class CopyLocationStep1 : RigConstraint<
+    CopyLocationStep1Job,
+    CopyLocationStep1Data,
+    CopyLocationStep1Binder
+    >
+{
+}

Assets/Constraints/CopyLocationStep1.cs.meta

+fileFormatVersion: 2
+guid: 516ed27db0cb8ec488907a2f059ebb0a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scenes/CopyLocationStep1.unity.meta

+fileFormatVersion: 2
+guid: 6d1bba9615ce4ae419c961035fcdf481
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: