// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using UnityEngine;


namespace UnityEditor
{
 class LightsModuleUI : ModuleUI
 {
 class Texts
 {
 public GUIContent ratio = EditorGUIUtility.TrTextContent("Ratio", "Amount of particles that have a light source attached to them.");
 public GUIContent randomDistribution = EditorGUIUtility.TrTextContent("Random Distribution", "Emit lights randomly, or at regular intervals.");
 public GUIContent light = EditorGUIUtility.TrTextContent("Light", "Light prefab to be used for spawning particle lights.");
 public GUIContent color = EditorGUIUtility.TrTextContent("Use Particle Color", "Check the option to multiply the particle color by the light color. Otherwise, only the color of the light is used.");
 public GUIContent range = EditorGUIUtility.TrTextContent("Size Affects Range", "Multiply the range of the light with the size of the particle.");
 public GUIContent intensity = EditorGUIUtility.TrTextContent("Alpha Affects Intensity", "Multiply the intensity of the light with the alpha of the particle.");
 public GUIContent rangeCurve = EditorGUIUtility.TrTextContent("Range Multiplier", "Apply a custom multiplier to the range of the lights.");
 public GUIContent intensityCurve = EditorGUIUtility.TrTextContent("Intensity Multiplier", "Apply a custom multiplier to the intensity of the lights.");
 public GUIContent maxLights = EditorGUIUtility.TrTextContent("Maximum Lights", "Limit the amount of lights the system can create. This module makes it very easy to create lots of lights, which can hurt performance.");
 }
 static Texts s_Texts;

 SerializedProperty m_Ratio;
 SerializedProperty m_RandomDistribution;
 SerializedProperty m_Light;
 SerializedProperty m_UseParticleColor;
 SerializedProperty m_SizeAffectsRange;
 SerializedProperty m_AlphaAffectsIntensity;
 SerializedMinMaxCurve m_Range;
 SerializedMinMaxCurve m_Intensity;
 SerializedProperty m_MaxLights;

 public LightsModuleUI(ParticleSystemUI owner, SerializedObject o, string displayName)
 : base(owner, o, "LightsModule", displayName)
 {
 m_ToolTip = "Controls light sources attached to particles.";
 }

 protected override void Init()
 {
 // Already initialized?
 if (m_Ratio != null)
 return;
 if (s_Texts == null)
 s_Texts = new Texts();

 m_Ratio = GetProperty("ratio");
 m_RandomDistribution = GetProperty("randomDistribution");
 m_Light = GetProperty("light");
 m_UseParticleColor = GetProperty("color");
 m_SizeAffectsRange = GetProperty("range");
 m_AlphaAffectsIntensity = GetProperty("intensity");
 m_MaxLights = GetProperty("maxLights");

 m_Range = new SerializedMinMaxCurve(this, s_Texts.rangeCurve, "rangeCurve");
 m_Intensity = new SerializedMinMaxCurve(this, s_Texts.intensityCurve, "intensityCurve");
 }

 override public void OnInspectorGUI(InitialModuleUI initial)
 {
 GUIObject(s_Texts.light, m_Light);
 GUIFloat(s_Texts.ratio, m_Ratio);
 GUIToggle(s_Texts.randomDistribution, m_RandomDistribution);
 GUIToggle(s_Texts.color, m_UseParticleColor);
 GUIToggle(s_Texts.range, m_SizeAffectsRange);
 GUIToggle(s_Texts.intensity, m_AlphaAffectsIntensity);
 GUIMinMaxCurve(s_Texts.rangeCurve, m_Range);
 GUIMinMaxCurve(s_Texts.intensityCurve, m_Intensity);
 GUIInt(s_Texts.maxLights, m_MaxLights);

 if (m_Light.objectReferenceValue)
 {
 Light light = (Light)m_Light.objectReferenceValue;
 if (light.type != LightType.Point && light.type != LightType.Spot)
 {
 GUIContent warning = EditorGUIUtility.TrTextContent("Only point and spot lights are supported on particles.");
 EditorGUILayout.HelpBox(warning.text, MessageType.Warning, true);
 }
 }
 }
 }
} // namespace UnityEditor