added uint field element for random seeds

com.unity.perception/CHANGELOG.md

 ### Added
 Added support for 'step' button in editor.
 
+Added random seed field to the Run in Unity Simulation Window
+
 ### Changed
 Increased color variety in instance segmentation images
 

com.unity.perception/Editor/Randomization/Editors/RunInUnitySimulationWindow.cs

 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
-using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using Newtonsoft.Json;
 using UnityEditor.UIElements;
 using UnityEngine;
+using UnityEngine.Perception.Randomization.Samplers;
+using Random = System.Random;
 
 namespace UnityEditor.Perception.Randomization
 {
         IntegerField m_InstanceCountField;
         TextField m_RunNameField;
         IntegerField m_TotalIterationsField;
+        UIntField m_RandomSeedField;
         ToolbarMenu m_SysParamMenu;
         int m_SysParamIndex;
         ObjectField m_ScenarioConfigField;
         Label m_PrevExecutionIdLabel;
+        Label m_PrevRandomSeedLabel;
-
-        const string  m_SupportedGPUString = "NVIDIA";
 
         [MenuItem("Window/Run in Unity Simulation")]
         static void ShowWindow()
             m_RunNameField = root.Q<TextField>("run-name");
             m_TotalIterationsField = root.Q<IntegerField>("total-iterations");
             m_InstanceCountField = root.Q<IntegerField>("instance-count");
+            m_RandomSeedField = root.Q<UIntField>("random-seed");
+
+            var randomizeSeedButton = root.Q<Button>("randomize-seed");
+            randomizeSeedButton.clicked += () =>
+            {
+                var bytes = new byte[4];
+                new Random().NextBytes(bytes);
+                m_RandomSeedField.value = BitConverter.ToUInt32(bytes, 0);
+            };
 
             m_SysParamDefinitions = API.GetSysParams();
             m_SysParamMenu = root.Q<ToolbarMenu>("sys-param");
             m_PrevRunNameLabel = root.Q<Label>("prev-run-name");
             m_ProjectIdLabel = root.Q<Label>("project-id");
             m_PrevExecutionIdLabel = root.Q<Label>("execution-id");
+            m_PrevRandomSeedLabel = root.Q<Label>("prev-random-seed");
 
             var copyExecutionIdButton = root.Q<Button>("copy-execution-id");
             copyExecutionIdButton.clicked += () =>
             copyProjectIdButton.clicked += () =>
                 EditorGUIUtility.systemCopyBuffer = CloudProjectSettings.projectId;
 
+            var copyPrevRandomSeedButton = root.Q<Button>("copy-prev-random-seed");
+            copyPrevRandomSeedButton.clicked += () =>
+                EditorGUIUtility.systemCopyBuffer = PlayerPrefs.GetString("SimWindow/prevRandomSeed");
+
             SetFieldsFromPlayerPreferences();
         }
 
             m_TotalIterationsField.value = PlayerPrefs.GetInt("SimWindow/totalIterations");
             m_InstanceCountField.value = PlayerPrefs.GetInt("SimWindow/instanceCount");
             m_SysParamIndex = PlayerPrefs.GetInt("SimWindow/sysParamIndex");
+
+            var prevRandomSeed = PlayerPrefs.GetString("SimWindow/prevRandomSeed");
+            m_RandomSeedField.value = string.IsNullOrEmpty(prevRandomSeed)
+                ? SamplerUtility.largePrime : uint.Parse(prevRandomSeed);
+
+            m_PrevRandomSeedLabel.text = $"Random Seed: {PlayerPrefs.GetString("SimWindow/prevRandomSeed")}";
         }
 
         static string IncrementRunName(string runName)
                 runName = m_RunNameField.value,
                 totalIterations = m_TotalIterationsField.value,
                 instanceCount = m_InstanceCountField.value,
+                randomSeed = m_RandomSeedField.value,
                 sysParamIndex = m_SysParamIndex,
                 scenarioConfig = (TextAsset)m_ScenarioConfigField.value,
                 currentOpenScenePath = SceneManager.GetSceneAt(0).path,
             var constants = configuration["constants"];
             constants["totalIterations"] = m_RunParameters.totalIterations;
             constants["instanceCount"] = m_RunParameters.instanceCount;
+            constants["randomSeed"] = m_RunParameters.randomSeed;
 
             var appParamName = $"{m_RunParameters.runName}";
             var appParamsString = JsonConvert.SerializeObject(configuration, Formatting.Indented);
             PlayerPrefs.SetString("SimWindow/prevExecutionId", run.executionId);
             PlayerPrefs.SetInt("SimWindow/totalIterations", m_RunParameters.totalIterations);
             PlayerPrefs.SetInt("SimWindow/instanceCount", m_RunParameters.instanceCount);
+            PlayerPrefs.SetString("SimWindow/prevRandomSeed", m_RunParameters.randomSeed.ToString());
             PlayerPrefs.SetInt("SimWindow/sysParamIndex", m_RunParameters.sysParamIndex);
             PlayerPrefs.SetString("SimWindow/scenarioConfig",
                 m_RunParameters.scenarioConfig != null ? m_RunParameters.scenarioConfigAssetPath : string.Empty);
             public string runName;
             public int totalIterations;
             public int instanceCount;
+            public uint randomSeed;
             public int sysParamIndex;
             public TextAsset scenarioConfig;
             public string currentOpenScenePath;

com.unity.perception/Editor/Randomization/Editors/ScenarioBaseEditor.cs

 using System.IO;
+using UnityEditor.UIElements;
 using UnityEngine;
 using UnityEngine.Perception.Randomization.Scenarios;
 using UnityEngine.UIElements;

com.unity.perception/Editor/Randomization/Uxml/RunInUnitySimulationWindow.uxml

                 tooltip="The number of scenario iterations to execute"/>
             <editor:IntegerField name="instance-count" label="Instance Count" max-value="10000"
                 tooltip="The number of instances to distribute the work load across"/>
+            <VisualElement style="flex-direction: row;">
+                <editor:UIntField name="random-seed" label="Random Seed" style="flex-grow: 1;"
+                                     tooltip="The initial random seed to use for the simulation"/>
+                <Button name="randomize-seed" text="Randomize"/>
+            </VisualElement>
+
             <VisualElement class="unity-base-field"
                            tooltip="The compute resources configuration to execute the simulation with">
                 <Label text="Sys-Param" class="unity-base-field__label"/>
             <Label name="prev-run-name" text="Run Name: " class="sim-window__label-prev-result"/>
             <Label name="project-id" text="Project ID: " class="sim-window__label-prev-result"/>
             <Label name="execution-id" text="Execution ID: " class="sim-window__label-prev-result"/>
+            <Label name="prev-random-seed" text="Random Seed: " class="sim-window__label-prev-result"/>
+                <Button name="copy-prev-random-seed" text="Copy Seed" style="flex-grow: 1; flex-shrink: 0;"/>
             </VisualElement>
         </VisualElement>
     </VisualElement>

com.unity.perception/Editor/Randomization/PropertyDrawers/UIntDrawer.cs

+using System;
+using UnityEngine;
+using UnityEngine.UIElements;
+using UnityEditor.UIElements;
+
+namespace UnityEditor.Perception.Randomization.PropertyDrawers
+{
+    [CustomPropertyDrawer(typeof(uint))]
+    class UIntDrawer : PropertyDrawer
+    {
+        public override VisualElement CreatePropertyGUI(SerializedProperty property)
+        {
+            var field = new UIntField
+            {
+                label = property.displayName,
+                bindingPath = property.propertyPath,
+                value = (uint)property.longValue
+            };
+
+            field.RegisterValueChangedCallback(evt =>
+            {
+                field.value = evt.newValue;
+                property.longValue = evt.newValue;
+                property.serializedObject.ApplyModifiedProperties();
+            });
+
+            // Create a surrogate integer field to detect and pass along external change events on the UIntField.
+            // UIElements currently does not support default change detection on non-SerializedProperty supported types.
+            var surrogateField = new IntegerField();
+            field.Add(surrogateField);
+            surrogateField.style.display = new StyleEnum<DisplayStyle>(DisplayStyle.None);
+            surrogateField.bindingPath = property.propertyPath;
+            surrogateField.RegisterValueChangedCallback(evt =>
+            {
+                evt.StopImmediatePropagation();
+                field.value = UIntField.ClampInput(property.longValue);
+            });
+
+            return field;
+        }
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            EditorGUI.PropertyField(position, property, label, true);
+        }
+
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return EditorGUI.GetPropertyHeight(property);
+        }
+    }
+}

com.unity.perception/Editor/Randomization/PropertyDrawers/UIntDrawer.cs.meta

+fileFormatVersion: 2
+guid: e363a3910d78fe943b8f50b68a2d2fb9
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

com.unity.perception/Editor/Randomization/VisualElements/Basic.meta

+fileFormatVersion: 2
+guid: 93e88a2d53dd88f42ae287310c2a6ca3
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

com.unity.perception/Editor/Randomization/VisualElements/Basic/UIntField.cs

+using System;
+using System.Globalization;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace UnityEditor.UIElements
+{
+    /// <summary>
+    ///     <para>Makes a text field for entering an unsigned integer.</para>
+    /// </summary>
+    public class UIntField : TextValueField<uint>
+    {
+        /// <summary>
+        ///     <para>USS class name of elements of this type.</para>
+        /// </summary>
+        public new static readonly string ussClassName = "unity-uint-field";
+        /// <summary>
+        ///     <para>USS class name of labels in elements of this type.</para>
+        /// </summary>
+        public new static readonly string labelUssClassName = ussClassName + "__label";
+        /// <summary>
+        ///     <para>USS class name of input elements in elements of this type.</para>
+        /// </summary>
+        public new static readonly string inputUssClassName = ussClassName + "__input";
+
+        /// <summary>
+        ///     <para>Constructor.</para>
+        /// </summary>
+        public UIntField()
+            : this(null) { }
+
+        /// <summary>
+        ///     <para>Constructor.</para>
+        /// </summary>
+        /// <param name="maxLength">Maximum number of characters the field can take.</param>
+        public UIntField(int maxLength)
+            : this(null, maxLength) { }
+
+        public UIntField(string label, int maxLength = -1)
+            : base(label, maxLength, new UIntInput())
+        {
+            AddToClassList(ussClassName);
+            labelElement.AddToClassList(labelUssClassName);
+            labelElement.AddToClassList("unity-property-field__label");
+            AddLabelDragger<uint>();
+        }
+
+        UIntInput uIntInput => (UIntInput)textInputBase;
+
+        /// <summary>
+        ///     <para>Converts the given uint to a string.</para>
+        /// </summary>
+        /// <param name="v">The uint to be converted to string.</param>
+        /// <returns>
+        ///     <para>The uint as string.</para>
+        /// </returns>
+        protected override string ValueToString(uint v)
+        {
+            return v.ToString(formatString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+
+        /// <summary>
+        ///     <para>Converts a string to an uint.</para>
+        /// </summary>
+        /// <param name="str">The string to convert.</param>
+        /// <returns>
+        ///     <para>The uint parsed from the string.</para>
+        /// </returns>
+        protected override uint StringToValue(string str)
+        {
+            long.TryParse(str, out var result);
+            return ClampInput(result);
+        }
+
+        /// <summary>
+        ///     <para>Modify the value using a 3D delta and a speed, typically coming from an input device.</para>
+        /// </summary>
+        /// <param name="delta">A vector used to compute the value change.</param>
+        /// <param name="speed">A multiplier for the value change.</param>
+        /// <param name="startValue">The start value.</param>
+        public override void ApplyInputDeviceDelta(Vector3 delta, DeltaSpeed speed, uint startValue)
+        {
+            uIntInput.ApplyInputDeviceDelta(delta, speed, startValue);
+        }
+
+        /// <summary>
+        ///     <para>Instantiates an UIntField using the data read from a UXML file.</para>
+        /// </summary>
+        public new class UxmlFactory : UxmlFactory<UIntField, UxmlTraits> { }
+
+        /// <summary>
+        ///     <para>Defines UxmlTraits for the UIntField.</para>
+        /// </summary>
+        public new class UxmlTraits : TextValueFieldTraits<uint, UxmlUIntAttributeDescription> { }
+
+        public static uint ClampInput(long input)
+        {
+            input = input > uint.MaxValue ? uint.MaxValue : input;
+            input = input < uint.MinValue ? uint.MinValue : input;
+            return (uint)input;
+        }
+
+        class UIntInput : TextValueInput
+        {
+            internal UIntInput()
+            {
+                formatString = "#######0";
+            }
+
+            UIntField parentUIntField => (UIntField)parent;
+
+            protected override string allowedCharacters => "0123456789";
+
+            public override void ApplyInputDeviceDelta(Vector3 delta, DeltaSpeed speed, uint startValue)
+            {
+                var num = StringToValue(text) + (long)Math.Round(delta.x);
+                var value = ClampInput(num);
+                if (parentUIntField.isDelayed)
+                    text = ValueToString(value);
+                else
+                    parentUIntField.value = value;
+            }
+
+            protected override string ValueToString(uint v)
+            {
+                return v.ToString(formatString);
+            }
+
+            protected override uint StringToValue(string str)
+            {
+                long.TryParse(str, out var result);
+                return ClampInput(result);
+            }
+        }
+    }
+}

com.unity.perception/Editor/Randomization/VisualElements/Basic/UIntField.cs.meta

+fileFormatVersion: 2
+guid: 64ee321fd1c586b4a9dbfc0f7da230be
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

com.unity.perception/Editor/Randomization/VisualElements/Basic/UxmlUIntAttributeDescription.cs

+using System;
+using System.Globalization;
+
+namespace UnityEngine.UIElements
+{
+    /// <summary>
+    ///     <para>Describes a XML int attribute.</para>
+    /// </summary>
+    public class UxmlUIntAttributeDescription : TypedUxmlAttributeDescription<uint>
+    {
+        /// <summary>
+        ///     <para>Constructor.</para>
+        /// </summary>
+        public UxmlUIntAttributeDescription()
+        {
+            type = "int";
+            typeNamespace = "http://www.w3.org/2001/XMLSchema";
+            defaultValue = 0;
+        }
+
+        /// <summary>
+        ///     <para>The default value for the attribute, as a string.</para>
+        /// </summary>
+        public override string defaultValueAsString => defaultValue.ToString(CultureInfo.InvariantCulture.NumberFormat);
+
+        /// <summary>
+        ///     <para>
+        ///         Retrieves the value of this attribute from the attribute bag. Returns it if it is found, otherwise return
+        ///         defaultValue.
+        ///     </para>
+        /// </summary>
+        /// <param name="bag">The bag of attributes.</param>
+        /// <param name="cc">The context in which the values are retrieved.</param>
+        /// <returns>
+        ///     <para>The value of the attribute.</para>
+        /// </returns>
+        public override uint GetValueFromBag(IUxmlAttributes bag, CreationContext cc)
+        {
+            return GetValueFromBag(bag, cc, (s, i) => ConvertValueToUInt(s, i), defaultValue);
+        }
+
+        public bool TryGetValueFromBag(IUxmlAttributes bag, CreationContext cc, ref uint value)
+        {
+            return TryGetValueFromBag(bag, cc, (s, i) => ConvertValueToUInt(s, i), defaultValue, ref value);
+        }
+
+        static uint ConvertValueToUInt(string v, uint defaultValue)
+        {
+            return v == null || !uint.TryParse(v, out uint result) ? defaultValue : result;
+        }
+    }
+}

com.unity.perception/Editor/Randomization/VisualElements/Basic/UxmlUIntAttributeDescription.cs.meta

+fileFormatVersion: 2
+guid: 2e94e3964dd6654488e74ca218f23111
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: