added hue randomizer

com.unity.perception/Runtime/Randomization/Randomizers/SampleRandomizers/Randomizers/HueOffsetRandomizer.cs

+using System;
+using UnityEngine.Experimental.Perception.Randomization.Parameters;
+using UnityEngine.Experimental.Perception.Randomization.Randomizers.SampleRandomizers.Tags;
+using UnityEngine.Experimental.Perception.Randomization.Samplers;
+
+namespace UnityEngine.Experimental.Perception.Randomization.Randomizers.SampleRandomizers
+{
+    /// <summary>
+    /// Randomly offsets the hue of objects tagged with a ColorRandomizerTag
+    /// </summary>
+    [Serializable]
+    public class HueOffsetRandomizer : Randomizer
+    {
+        static readonly int k_HueOffsetShaderProperty = Shader.PropertyToID("_HueOffset");
+
+        /// <summary>
+        /// The range of hue offsets to assign to tagged objects
+        /// </summary>
+        public FloatParameter hueOffset = new FloatParameter { value = new UniformSampler(-180f, 180f) };
+
+        /// <summary>
+        /// Randomizes the hue offset of tagged objects at the start of each scenario iteration
+        /// </summary>
+        protected override void OnIterationStart()
+        {
+            var taggedObjects = tagManager.Query<HueOffsetRandomizerTag>();
+            foreach (var taggedObject in taggedObjects)
+            {
+                var renderer = taggedObject.GetComponent<MeshRenderer>();
+                renderer.material.SetFloat(k_HueOffsetShaderProperty, hueOffset.Sample());
+            }
+        }
+    }
+}

com.unity.perception/Runtime/Randomization/Randomizers/SampleRandomizers/Randomizers/HueOffsetRandomizer.cs.meta

+fileFormatVersion: 2
+guid: cc39dc130de74dd2956d0c35cfdc0353
+timeCreated: 1600902527

com.unity.perception/Runtime/Randomization/Randomizers/SampleRandomizers/Tags/HueOffsetRandomizerTag.cs

+namespace UnityEngine.Experimental.Perception.Randomization.Randomizers.SampleRandomizers.Tags
+{
+    /// <summary>
+    /// Used in conjunction with a HueOffsetRandomizer to vary the hue of GameObjects
+    /// </summary>
+    [AddComponentMenu("Perception/RandomizerTags/HueOffsetRandomizerTag")]
+    public class HueOffsetRandomizerTag : RandomizerTag { }
+}

com.unity.perception/Runtime/Randomization/Randomizers/SampleRandomizers/Tags/HueOffsetRandomizerTag.cs.meta

+fileFormatVersion: 2
+guid: 15d8103dbb8346ad8a6cf5bcf723c188
+timeCreated: 1600902591