Merge branch 'master' of github.com:davehunt-unity/animation-rigging-workshop-siggraph2019

Assets/Scenes/CopyLocation.unity

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Assets/Constraints/CopyLocationStep0.cs

+using UnityEngine;
+using UnityEngine.Animations.Rigging;
+using UnityEngine.Experimental.Animations;
+using Unity.Burst;
+using Unity.Mathematics;
+
+[BurstCompile]
+public struct CopyLocationStep0Job : IWeightedAnimationJob
+{
+    public ReadWriteTransformHandle constrained;
+    public ReadOnlyTransformHandle  source;
+
+    // TODO : Add invert axis mask
+
+    public FloatProperty jobWeight { get; set; }
+
+    public void ProcessRootMotion(AnimationStream stream) { }
+
+    public void ProcessAnimation(AnimationStream stream)
+    {
+        float w = jobWeight.Get(stream);
+        if (w > 0f)
+        {
+            // TODO : Change code to consider inverted axis positions instead
+
+            constrained.SetPosition(
+                stream,
+                math.lerp(constrained.GetPosition(stream), -source.GetPosition(stream), w)
+                );
+        }
+    }
+}
+
+[System.Serializable]
+public struct CopyLocationStep0Data : IAnimationJobData
+{
+    public Transform constrainedObject;
+    [SyncSceneToStream] public Transform sourceObject;
+
+    // TODO : Add invert axis booleans
+
+    public bool IsValid()
+    {
+        return !(constrainedObject == null || sourceObject == null);
+    }
+
+    public void SetDefaultValues()
+    {
+        constrainedObject = null;
+        sourceObject = null;
+
+        // TODO : Set initial values to invert booleans
+    }
+}
+
+public class CopyLocationStep0Binder : AnimationJobBinder<CopyLocationStep0Job, CopyLocationStep0Data>
+{
+    public override CopyLocationStep0Job Create(Animator animator, ref CopyLocationStep0Data data, Component component)
+    {
+        return new CopyLocationStep0Job()
+        {
+            constrained = ReadWriteTransformHandle.Bind(animator, data.constrainedObject),
+            source = ReadOnlyTransformHandle.Bind(animator, data.sourceObject)
+        };
+    }
+
+    public override void Destroy(CopyLocationStep0Job job) { }
+}
+
+[DisallowMultipleComponent, AddComponentMenu("SIGGRAPH 2019/Copy Location (Step 0)")]
+public class CopyLocationStep0 : RigConstraint<
+    CopyLocationStep0Job,
+    CopyLocationStep0Data,
+    CopyLocationStep0Binder
+    >
+{
+}

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