Simplified HDLightEditor code and added color temperature gradient

ScriptableRenderPipeline/Core/Editor/CoreEditorUtils.cs

 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Linq.Expressions;
 using System.Text;
 using UnityEngine;
         public static void RemoveMaterialKeywords(Material material)
         {
             material.shaderKeywords = null;
+        }
+
+        public static T[] GetAdditionalData<T>(params UnityEngine.Object[] targets)
+            where T : Component
+        {
+            // Handles multi-selection
+            var data = targets.Cast<Component>()
+                .Select(t => t.GetComponent<T>())
+                .ToArray();
+
+            for (int i = 0; i < data.Length; i++)
+            {
+                if (data[i] == null)
+                    data[i] = Undo.AddComponent<T>(((Component)targets[i]).gameObject);
+            }
+
+            return data;
         }
     }
 }

ScriptableRenderPipeline/HDRenderPipeline/Lighting/Editor/HDLightEditor.Styles.cs

         sealed class Styles
         {
             // Base
-            public readonly GUIContent range = new GUIContent("Range", "Controls how far the light is emitted from the center of the object.");
-            public readonly GUIContent color = new GUIContent("Color", "Controls the color being emitted by the light.");
-            public readonly GUIContent spotAngle = new GUIContent("Angle", "Controls the angle in degrees at the base of a Spot light's cone.");
-            public readonly GUIContent useColorTemperature = new GUIContent("Use Color Temperature", "Choose between RGB and temperature mode for light's color.");
-            public readonly GUIContent colorFilter = new GUIContent("Filter", "A colored gel can be put in front of the light source to tint the light.");
-            public readonly GUIContent colorTemperature = new GUIContent("Temperature", "Also known as CCT (Correlated color temperature). The color temperature of the electromagnetic radiation emitted from an ideal black body is defined as its surface temperature in Kelvin. White is 6500K");
-            public readonly GUIContent intensity = new GUIContent("Intensity", "Controls the brightness of the light. Light color is multiplied by this value.");
-            public readonly GUIContent lightmappingMode = new GUIContent("Mode", "Specifies the light mode used to determine if and how a light will be baked. Possible modes are Baked, Mixed, and Realtime.");
-            public readonly GUIContent lightBounceIntensity = new GUIContent("Indirect Multiplier", "Controls the intensity of indirect light being contributed to the scene. A value of 0 will cause Realtime lights to be removed from realtime global illumination and Baked and Mixed lights to no longer emit indirect lighting. Has no effect when both Realtime and Baked Global Illumination are disabled.");
-            public readonly GUIContent cookie = new GUIContent("Cookie", "Specifies the Texture mask to cast shadows, create silhouettes, or patterned illumination for the light.");
             public readonly GUIContent cookieSizeX = new GUIContent("Size X", "Controls the size of the cookie mask currently assigned to the light.");
             public readonly GUIContent cookieSizeY = new GUIContent("Size Y", "Controls the size of the cookie mask currently assigned to the light.");
             public readonly GUIContent shadowBias = new GUIContent("Bias", "Controls the distance at which the shadows will be pushed away from the light. Useful for avoiding false self-shadowing artifacts.");
             public readonly GUIContent bakedShadowAngle = new GUIContent("Baked Shadow Angle", "Controls the amount of artificial softening applied to the edges of shadows cast by directional lights.");
-
-            public readonly GUIContent bakingWarning = new GUIContent("Light mode is currently overridden to Realtime mode. Enable Baked Global Illumination to use Mixed or Baked light modes.");
-            public readonly GUIContent indirectBounceShadowWarning = new GUIContent("Realtime indirect bounce shadowing is not supported for Spot and Point lights.");
-            public readonly GUIContent cookieWarning = new GUIContent("Cookie textures for spot lights should be set to clamp, not repeat, to avoid artifacts.");
 
             // Additional light data
             public readonly GUIContent maxSmoothness = new GUIContent("Max Smoothness", "Very low cost way of faking spherical area lighting. This will modify the roughness of the material lit. This is useful when the specular highlight is too small or too sharp.");

ScriptableRenderPipeline/HDRenderPipeline/Lighting/Editor/HDLightEditor.cs

 using System;
-using System.Linq;
-using UnityEngine.Rendering;
-    // TODO: Simplify this editor once we can target 2018.1
-        sealed class SerializedBaseData
-        {
-            public SerializedProperty type;
-            public SerializedProperty range;
-            public SerializedProperty spotAngle;
-            public SerializedProperty cookie;
-            public SerializedProperty cookieSize;
-            public SerializedProperty color;
-            public SerializedProperty intensity;
-            public SerializedProperty bounceIntensity;
-            public SerializedProperty colorTemperature;
-            public SerializedProperty useColorTemperature;
-            public SerializedProperty shadowsType;
-            public SerializedProperty shadowsBias;
-            public SerializedProperty shadowsNormalBias;
-            public SerializedProperty shadowsNearPlane;
-            public SerializedProperty lightmapping;
-            public SerializedProperty areaSizeX;
-            public SerializedProperty areaSizeY;
-            public SerializedProperty bakedShadowRadius;
-            public SerializedProperty bakedShadowAngle;
-        }
-
         sealed class SerializedLightData
         {
             public SerializedProperty spotInnerPercent;
         SerializedObject m_SerializedAdditionalLightData;
         SerializedObject m_SerializedAdditionalShadowData;
 
-        SerializedBaseData m_BaseData;
+        //SerializedBaseData m_BaseData;
-        // Copied over from teh original LightEditor class. Will go away once we can target 2018.1
-        bool m_TypeIsSame { get { return !m_BaseData.type.hasMultipleDifferentValues; } }
-        bool m_LightmappingTypeIsSame { get { return !m_BaseData.lightmapping.hasMultipleDifferentValues; } }
-        bool m_IsCompletelyBaked { get { return m_BaseData.lightmapping.intValue == 2; } }
-        bool m_IsRealtime { get { return m_BaseData.lightmapping.intValue == 4; } }
-        Light light { get { return serializedObject.targetObject as Light; } }
-        Texture m_Cookie { get { return m_BaseData.cookie.objectReferenceValue as Texture; } }
-        bool m_BakingWarningValue { get { return !UnityEditor.Lightmapping.bakedGI && m_LightmappingTypeIsSame && !m_IsRealtime; } }
-        bool m_BounceWarningValue
-        {
-            get
-            {
-                return m_TypeIsSame && (light.type == LightType.Point || light.type == LightType.Spot) &&
-                    m_LightmappingTypeIsSame && m_IsRealtime && !m_BaseData.bounceIntensity.hasMultipleDifferentValues
-                    && m_BaseData.bounceIntensity.floatValue > 0.0f;
-            }
-        }
-        public bool cookieWarningValue
-        {
-            get
-            {
-                return m_TypeIsSame && light.type == LightType.Spot &&
-                    !m_BaseData.cookie.hasMultipleDifferentValues && m_Cookie && m_Cookie.wrapMode != TextureWrapMode.Clamp;
-            }
-        }
-
         // LightType + LightTypeExtent combined
         enum LightShape
         {
         // Used for UI only; the processing code must use LightTypeExtent and LightType
         LightShape m_LightShape;
 
-        void OnEnable()
+        protected override void OnEnable()
+            base.OnEnable();
+
-            var lightData = GetAdditionalData<HDAdditionalLightData>();
-            var shadowData = GetAdditionalData<AdditionalShadowData>();
+            var lightData = CoreEditorUtils.GetAdditionalData<HDAdditionalLightData>(targets);
+            var shadowData = CoreEditorUtils.GetAdditionalData<AdditionalShadowData>(targets);
-            // Grab all the serialized data we need
-            m_BaseData = new SerializedBaseData
-            {
-                type = serializedObject.FindProperty("m_Type"),
-                range = serializedObject.FindProperty("m_Range"),
-                spotAngle = serializedObject.FindProperty("m_SpotAngle"),
-                cookie = serializedObject.FindProperty("m_Cookie"),
-                cookieSize = serializedObject.FindProperty("m_CookieSize"),
-                color = serializedObject.FindProperty("m_Color"),
-                intensity = serializedObject.FindProperty("m_Intensity"),
-                bounceIntensity = serializedObject.FindProperty("m_BounceIntensity"),
-                colorTemperature = serializedObject.FindProperty("m_ColorTemperature"),
-                useColorTemperature = serializedObject.FindProperty("m_UseColorTemperature"),
-                shadowsType = serializedObject.FindProperty("m_Shadows.m_Type"),
-                shadowsBias = serializedObject.FindProperty("m_Shadows.m_Bias"),
-                shadowsNormalBias = serializedObject.FindProperty("m_Shadows.m_NormalBias"),
-                shadowsNearPlane = serializedObject.FindProperty("m_Shadows.m_NearPlane"),
-                lightmapping = serializedObject.FindProperty("m_Lightmapping"),
-                areaSizeX = serializedObject.FindProperty("m_AreaSize.x"),
-                areaSizeY = serializedObject.FindProperty("m_AreaSize.y"),
-                bakedShadowRadius = serializedObject.FindProperty("m_ShadowRadius"),
-                bakedShadowAngle = serializedObject.FindProperty("m_ShadowAngle")
-            };
-
             using (var o = new PropertyFetcher<HDAdditionalLightData>(m_SerializedAdditionalLightData))
             m_AdditionalLightData = new SerializedLightData
             {
             ApplyAdditionalComponentsVisibility(true);
             CheckStyles();
 
-            serializedObject.Update();
+            settings.Update();
-            DrawFoldout(m_BaseData.type, "Shape", DrawShape);
-            DrawFoldout(m_BaseData.intensity, "Light", DrawLightSettings);
+            DrawFoldout(settings.lightType, "Shape", DrawShape);
+            DrawFoldout(settings.intensity, "Light", DrawLightSettings);
-            if (m_BaseData.shadowsType.enumValueIndex != (int)LightShadows.None)
-                DrawFoldout(m_BaseData.shadowsType, "Shadows", DrawShadows);
+            if (settings.shadowsType.enumValueIndex != (int)LightShadows.None)
+                DrawFoldout(settings.shadowsType, "Shadows", DrawShadows);
 
             CoreEditorUtils.DrawSplitter();
             EditorGUILayout.Space();
-            serializedObject.ApplyModifiedProperties();
+            settings.ApplyModifiedProperties();
         }
 
         void DrawFoldout(SerializedProperty foldoutProperty, string title, Action func)
         {
             EditorGUILayout.PropertyField(m_AdditionalLightData.showAdditionalSettings);
 
-            bool disabledScope = m_IsCompletelyBaked
+            bool disabledScope = settings.isCompletelyBaked
-                bool shadowsEnabled = EditorGUILayout.Toggle(new GUIContent("Enable Shadows"), m_BaseData.shadowsType.enumValueIndex != 0);
-                m_BaseData.shadowsType.enumValueIndex = shadowsEnabled ? (int)LightShadows.Hard : (int)LightShadows.None;
+                bool shadowsEnabled = EditorGUILayout.Toggle(CoreEditorUtils.GetContent("Enable Shadows"), settings.shadowsType.enumValueIndex != 0);
+                settings.shadowsType.enumValueIndex = shadowsEnabled ? (int)LightShadows.Hard : (int)LightShadows.None;
             }
         }
 
             switch (m_LightShape)
             {
                 case LightShape.Directional:
-                    m_BaseData.type.enumValueIndex = (int)LightType.Directional;
+                    settings.lightType.enumValueIndex = (int)LightType.Directional;
-                    m_BaseData.type.enumValueIndex = (int)LightType.Point;
+                    settings.lightType.enumValueIndex = (int)LightType.Point;
-                    m_BaseData.type.enumValueIndex = (int)LightType.Spot;
+                    settings.lightType.enumValueIndex = (int)LightType.Spot;
                     m_AdditionalLightData.lightTypeExtent.enumValueIndex = (int)LightTypeExtent.Punctual;
                     EditorGUILayout.PropertyField(m_AdditionalLightData.spotLightShape, s_Styles.spotLightShape);
                     var spotLightShape = (SpotLightShape)m_AdditionalLightData.spotLightShape.enumValueIndex;
-                        EditorGUILayout.Slider(m_BaseData.spotAngle, 0f, 179.9f, s_Styles.spotAngle);
+                        settings.DrawSpotAngle();
-                        EditorGUILayout.Slider(m_BaseData.spotAngle, 0f, 179.9f, s_Styles.spotAngle);
+                        settings.DrawSpotAngle();
                         EditorGUILayout.Slider(m_AdditionalLightData.aspectRatio, 0.05f, 20.0f, s_Styles.aspectRatioPyramid);
                     }
                     else if (spotLightShape == SpotLightShape.Box)
                 case LightShape.Rectangle:
                     // TODO: Currently if we use Area type as it is offline light in legacy, the light will not exist at runtime
                     //m_BaseData.type.enumValueIndex = (int)LightType.Area;
-                    m_BaseData.type.enumValueIndex = (int)LightType.Point;
+                    settings.lightType.enumValueIndex = (int)LightType.Point;
-                    m_BaseData.areaSizeX.floatValue = m_AdditionalLightData.shapeLength.floatValue;
-                    m_BaseData.areaSizeY.floatValue = m_AdditionalLightData.shapeWidth.floatValue;
-                    m_BaseData.shadowsType.enumValueIndex = (int)LightShadows.None;
+                    settings.areaSizeX.floatValue = m_AdditionalLightData.shapeLength.floatValue;
+                    settings.areaSizeY.floatValue = m_AdditionalLightData.shapeWidth.floatValue;
+                    settings.shadowsType.enumValueIndex = (int)LightShadows.None;
-                    m_BaseData.type.enumValueIndex = (int)LightType.Point;
+                    settings.lightType.enumValueIndex = (int)LightType.Point;
-                    m_BaseData.areaSizeX.floatValue = m_AdditionalLightData.shapeLength.floatValue;
-                    m_BaseData.areaSizeY.floatValue = 0.01f;
-                    m_BaseData.shadowsType.enumValueIndex = (int)LightShadows.None;
+                    settings.areaSizeX.floatValue = m_AdditionalLightData.shapeLength.floatValue;
+                    settings.areaSizeY.floatValue = 0.01f;
+                    settings.shadowsType.enumValueIndex = (int)LightShadows.None;
                     break;
 
                 case (LightShape)(-1):
 
         void DrawLightSettings()
         {
-            if (GraphicsSettings.lightsUseLinearIntensity && GraphicsSettings.lightsUseColorTemperature)
-            {
-                EditorGUILayout.PropertyField(m_BaseData.useColorTemperature, s_Styles.useColorTemperature);
-                if (m_BaseData.useColorTemperature.boolValue)
-                {
-                    const float kMinKelvin = 1000f;
-                    const float kMaxKelvin = 20000f;
-
-                    EditorGUILayout.LabelField(s_Styles.color);
-                    EditorGUI.indentLevel += 1;
-                    EditorGUILayout.PropertyField(m_BaseData.color, s_Styles.colorFilter);
-                    EditorGUILayout.Slider(m_BaseData.colorTemperature, kMinKelvin, kMaxKelvin, s_Styles.colorTemperature);
-                    EditorGUI.indentLevel -= 1;
-                }
-                else EditorGUILayout.PropertyField(m_BaseData.color, s_Styles.color);
-            }
-            else EditorGUILayout.PropertyField(m_BaseData.color, s_Styles.color);
-
-            EditorGUILayout.PropertyField(m_BaseData.intensity, s_Styles.intensity);
-            EditorGUILayout.PropertyField(m_BaseData.bounceIntensity, s_Styles.lightBounceIntensity);
-
-            // Indirect shadows warning (Should be removed when we support realtime indirect shadows)
-            if (m_BounceWarningValue)
-                EditorGUILayout.HelpBox(s_Styles.indirectBounceShadowWarning.text, MessageType.Info);
-
-            EditorGUILayout.PropertyField(m_BaseData.range, s_Styles.range);
-            EditorGUILayout.PropertyField(m_BaseData.lightmapping, s_Styles.lightmappingMode);
-
-            // Warning if GI Baking disabled and m_Lightmapping isn't realtime
-            if (m_BakingWarningValue)
-                EditorGUILayout.HelpBox(s_Styles.bakingWarning.text, MessageType.Info);
+            settings.DrawColor();
+            settings.DrawIntensity();
+            settings.DrawBounceIntensity();
+            settings.DrawRange(false);
+            settings.DrawLightmapping();
-                EditorGUILayout.PropertyField(m_BaseData.cookie, s_Styles.cookie);
-
-                // Warn on spotlights if the cookie is set to repeat
-                if (cookieWarningValue)
-                    EditorGUILayout.HelpBox(s_Styles.cookieWarning.text, MessageType.Warning);
+                settings.DrawCookie();
-                if (m_Cookie != null && m_LightShape == LightShape.Directional)
+                if (settings.cookie != null && m_LightShape == LightShape.Directional)
                 {
                     EditorGUILayout.Slider(m_AdditionalLightData.shapeLength, 0.01f, 10f, s_Styles.cookieSizeX);
                     EditorGUILayout.Slider(m_AdditionalLightData.shapeWidth, 0.01f, 10f, s_Styles.cookieSizeY);
 
         void DrawShadows()
         {
-            if (m_IsCompletelyBaked)
+            if (settings.isCompletelyBaked)
-                switch ((LightType)m_BaseData.type.enumValueIndex)
+                switch ((LightType)settings.lightType.enumValueIndex)
-                        EditorGUILayout.Slider(m_BaseData.bakedShadowAngle, 0f, 90f, s_Styles.bakedShadowAngle);
+                        EditorGUILayout.Slider(settings.bakedShadowAngleProp, 0f, 90f, s_Styles.bakedShadowAngle);
-                        EditorGUILayout.PropertyField(m_BaseData.bakedShadowRadius, s_Styles.bakedShadowRadius);
+                        EditorGUILayout.PropertyField(settings.bakedShadowRadiusProp, s_Styles.bakedShadowRadius);
                         break;
                 }
 
             EditorGUILayout.PropertyField(m_AdditionalShadowData.resolution, s_Styles.shadowResolution);
-            EditorGUILayout.Slider(m_BaseData.shadowsBias, 0.001f, 1f, s_Styles.shadowBias);
-            EditorGUILayout.Slider(m_BaseData.shadowsNormalBias, 0.001f, 1f, s_Styles.shadowNormalBias);
-            EditorGUILayout.Slider(m_BaseData.shadowsNearPlane, 0.01f, 10f, s_Styles.shadowNearPlane);
+            EditorGUILayout.Slider(settings.shadowsBias, 0.001f, 1f, s_Styles.shadowBias);
+            EditorGUILayout.Slider(settings.shadowsNormalBias, 0.001f, 1f, s_Styles.shadowNormalBias);
+            EditorGUILayout.Slider(settings.shadowsNearPlane, 0.01f, 10f, s_Styles.shadowNearPlane);
-            if (m_BaseData.type.enumValueIndex != (int)LightType.Directional)
+            if (settings.lightType.enumValueIndex != (int)LightType.Directional)
                 return;
 
             using (var scope = new EditorGUI.ChangeCheckScope())
 
         void ResolveLightShape()
         {
-            var type = m_BaseData.type;
+            var type = settings.lightType;
 
             // Special case for multi-selection: don't resolve light shape or it'll corrupt lights
             if (type.hasMultipleDifferentValues)
                         break;
                 }
             }
-        }
-
-        // TODO: Move this to a generic EditorUtilities class
-        T[] GetAdditionalData<T>()
-            where T : Component
-        {
-            // Handles multi-selection
-            var data = targets.Cast<Component>()
-                .Select(t => t.GetComponent<T>())
-                .ToArray();
-
-            for (int i = 0; i < data.Length; i++)
-            {
-                if (data[i] == null)
-                    data[i] = Undo.AddComponent<T>(((Component)targets[i]).gameObject);
-            }
-
-            return data;
         }
     }
 }