// 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 CustomDataModuleUI : ModuleUI
 {
 enum Mode { Disabled = 0, Vector = 1, Color = 2 }
 const int k_NumCustomDataStreams = 2;
 const int k_NumChannelsPerStream = 4;

 SerializedProperty[] m_Modes = new SerializedProperty[k_NumCustomDataStreams];
 SerializedProperty[] m_VectorComponentCount = new SerializedProperty[k_NumCustomDataStreams];
 SerializedMinMaxCurve[,] m_Vectors = new SerializedMinMaxCurve[k_NumCustomDataStreams, k_NumChannelsPerStream];
 SerializedMinMaxGradient[] m_Colors = new SerializedMinMaxGradient[k_NumCustomDataStreams];
 SerializedProperty[,] m_VectorLabels = new SerializedProperty[k_NumCustomDataStreams, k_NumChannelsPerStream];
 SerializedProperty[] m_ColorLabels = new SerializedProperty[k_NumCustomDataStreams];

 class Texts
 {
 public GUIContent mode = EditorGUIUtility.TrTextContent("Mode", "Select the type of data to populate this stream with.");
 public GUIContent vectorComponentCount = EditorGUIUtility.TrTextContent("Number of Components", "How many of the components (XYZW) to fill.");

 public GUIContent[] modes = new GUIContent[]
 {
 EditorGUIUtility.TrTextContent("Disabled"),
 EditorGUIUtility.TrTextContent("Vector"),
 EditorGUIUtility.TrTextContent("Color")
 };
 }
 static Texts s_Texts;

 public CustomDataModuleUI(ParticleSystemUI owner, SerializedObject o, string displayName)
 : base(owner, o, "CustomDataModule", displayName)
 {
 m_ToolTip = "Configure custom data to be read in scripts or shaders. Use GetCustomParticleData from script, or send to shaders using the Custom Vertex Streams.";
 }

 protected override void Init()
 {
 // Already initialized?
 if (m_Modes[0] != null)
 return;
 if (s_Texts == null)
 s_Texts = new Texts();

 for (int i = 0; i < k_NumCustomDataStreams; i++)
 {
 m_Modes[i] = GetProperty("mode" + i);
 m_VectorComponentCount[i] = GetProperty("vectorComponentCount" + i);
 m_Colors[i] = new SerializedMinMaxGradient(this, "color" + i);
 m_ColorLabels[i] = GetProperty("colorLabel" + i);
 for (int j = 0; j < k_NumChannelsPerStream; j++)
 {
 m_Vectors[i, j] = new SerializedMinMaxCurve(this, GUIContent.none, "vector" + i + "_" + j, kUseSignedRange);
 m_VectorLabels[i, j] = GetProperty("vectorLabel" + i + "_" + j);
 }
 }
 }

 override public void OnInspectorGUI(InitialModuleUI initial)
 {
 for (int i = 0; i < k_NumCustomDataStreams; i++)
 {
 GUILayout.BeginVertical("Custom" + (i + 1), ParticleSystemStyles.Get().customDataWindow);

 Mode mode = (Mode)GUIPopup(s_Texts.mode, m_Modes[i], s_Texts.modes);
 if (mode == Mode.Vector)
 {
 int vectorComponentCount = Mathf.Min(GUIInt(s_Texts.vectorComponentCount, m_VectorComponentCount[i]), k_NumChannelsPerStream);
 for (int j = 0; j < vectorComponentCount; j++)
 {
 GUIMinMaxCurve(m_VectorLabels[i, j], m_Vectors[i, j]);
 }
 }
 else if (mode == Mode.Color)
 {
 GUIMinMaxGradient(m_ColorLabels[i], m_Colors[i], true);
 }

 GUILayout.EndVertical();
 }
 }
 }
} // namespace UnityEditor