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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using UnityEditor.Experimental.UIElements;
using UnityEditor.Experimental.UIElements.GraphView;
using UnityEditor.Graphing.Util;
using UnityEngine;
using UnityEngine.Assertions;
using UnityEngine.Experimental.UIElements;
using UnityEditor.Graphing;
using UnityEditor.ShaderGraph;
using Object = UnityEngine.Object;
using Edge = UnityEditor.Experimental.UIElements.GraphView.Edge;
namespace UnityEditor.ShaderGraph.Drawing
{
public class MaterialGraphEditWindow : EditorWindow
{
[SerializeField]
string m_Selected;
[SerializeField]
SerializableGraphObject m_GraphObject;
GraphEditorView m_GraphEditorView;
GraphEditorView graphEditorView
{
get { return m_GraphEditorView; }
set
{
if (m_GraphEditorView != null)
{
m_GraphEditorView.RemoveFromHierarchy();
m_GraphEditorView.Dispose();
}
m_GraphEditorView = value;
if (m_GraphEditorView != null)
{
m_GraphEditorView.onUpdateAssetClick += UpdateAsset;
m_GraphEditorView.onConvertToSubgraphClick += ToSubGraph;
m_GraphEditorView.onShowInProjectClick += PingAsset;
this.GetRootVisualContainer().Add(graphEditorView);
}
}
}
SerializableGraphObject graphObject
{
get { return m_GraphObject; }
set
{
if (m_GraphObject != null)
DestroyImmediate(m_GraphObject);
m_GraphObject = value;
}
}
public string selectedGuid
{
get { return m_Selected; }
private set { m_Selected = value; }
}
void Update()
{
if (graphObject == null)
return;
var materialGraph = graphObject.graph as AbstractMaterialGraph;
if (materialGraph == null)
return;
if (graphEditorView == null)
{
var asset = AssetDatabase.LoadAssetAtPath<Object>(AssetDatabase.GUIDToAssetPath(selectedGuid));
graphEditorView = new GraphEditorView(materialGraph, asset.name) {persistenceKey = AssetDatabase.AssetPathToGUID(AssetDatabase.GUIDToAssetPath(selectedGuid))};
}
graphEditorView.HandleGraphChanges();
graphObject.graph.ClearChanges();
}
void OnDisable()
{
graphEditorView = null;
}
void OnDestroy()
{
if (graphObject.isDirty && EditorUtility.DisplayDialog("Shader Graph Might Have Been Modified", "Do you want to save the changes you made in the shader graph?", "Save", "Don't Save"))
UpdateAsset();
Undo.ClearUndo(graphObject);
DestroyImmediate(graphObject);
graphEditorView = null;
}
public void PingAsset()
{
if (selectedGuid != null)
{
var path = AssetDatabase.GUIDToAssetPath(selectedGuid);
var asset = AssetDatabase.LoadAssetAtPath<Object>(path);
EditorGUIUtility.PingObject(asset);
}
}
public void UpdateAsset()
{
if (selectedGuid != null && graphObject != null)
{
var path = AssetDatabase.GUIDToAssetPath(selectedGuid);
if (string.IsNullOrEmpty(path) || graphObject == null)
return;
if (m_GraphObject.graph.GetType() == typeof(MaterialGraph))
UpdateShaderGraphOnDisk(path);
if (m_GraphObject.graph.GetType() == typeof(LayeredShaderGraph))
UpdateShaderGraphOnDisk(path);
if (m_GraphObject.graph.GetType() == typeof(SubGraph))
UpdateAbstractSubgraphOnDisk<SubGraph>(path);
if (m_GraphObject.graph.GetType() == typeof(MasterRemapGraph))
UpdateAbstractSubgraphOnDisk<MasterRemapGraph>(path);
graphObject.isDirty = false;
var windows = Resources.FindObjectsOfTypeAll<MaterialGraphEditWindow>();
foreach (var materialGraphEditWindow in windows)
{
materialGraphEditWindow.Rebuild();
}
}
}
public void ToSubGraph()
{
var path = EditorUtility.SaveFilePanelInProject("Save subgraph", "New SubGraph", "ShaderSubGraph", "");
path = path.Replace(Application.dataPath, "Assets");
if (path.Length == 0)
return;
var graphView = graphEditorView.graphView;
var nodes = graphView.selection.OfType<MaterialNodeView>().Where(x => !(x.node is PropertyNode)).Select(x => x.node as INode).ToArray();
Vector2 middle = Vector2.zero;
foreach (var node in nodes)
{
middle += node.drawState.position.center;
}
middle /= nodes.Length;
var copyPasteGraph = new CopyPasteGraph(
graphView.selection.OfType<MaterialNodeView>().Where(x => !(x.node is PropertyNode)).Select(x => x.node as INode),
graphView.selection.OfType<Edge>().Select(x => x.userData as IEdge));
var deserialized = CopyPasteGraph.FromJson(JsonUtility.ToJson(copyPasteGraph, false));
if (deserialized == null)
return;
var subGraph = new SubGraph();
subGraph.AddNode(new SubGraphOutputNode());
var nodeGuidMap = new Dictionary<Guid, Guid>();
foreach (var node in deserialized.GetNodes<INode>())
{
var oldGuid = node.guid;
var newGuid = node.RewriteGuid();
nodeGuidMap[oldGuid] = newGuid;
subGraph.AddNode(node);
}
// figure out what needs remapping
var externalOutputSlots = new List<IEdge>();
var externalInputSlots = new List<IEdge>();
foreach (var edge in deserialized.edges)
{
var outputSlot = edge.outputSlot;
var inputSlot = edge.inputSlot;
Guid remappedOutputNodeGuid;
Guid remappedInputNodeGuid;
var outputSlotExistsInSubgraph = nodeGuidMap.TryGetValue(outputSlot.nodeGuid, out remappedOutputNodeGuid);
var inputSlotExistsInSubgraph = nodeGuidMap.TryGetValue(inputSlot.nodeGuid, out remappedInputNodeGuid);
// pasting nice internal links!
if (outputSlotExistsInSubgraph && inputSlotExistsInSubgraph)
{
var outputSlotRef = new SlotReference(remappedOutputNodeGuid, outputSlot.slotId);
var inputSlotRef = new SlotReference(remappedInputNodeGuid, inputSlot.slotId);
subGraph.Connect(outputSlotRef, inputSlotRef);
}
// one edge needs to go to outside world
else if (outputSlotExistsInSubgraph)
{
externalInputSlots.Add(edge);
}
else if (inputSlotExistsInSubgraph)
{
externalOutputSlots.Add(edge);
}
}
// Find the unique edges coming INTO the graph
var uniqueIncomingEdges = externalOutputSlots.GroupBy(
edge => edge.outputSlot,
edge => edge,
(key, edges) => new {slotRef = key, edges = edges.ToList()});
var externalInputNeedingConnection = new List<KeyValuePair<IEdge, IShaderProperty>>();
foreach (var group in uniqueIncomingEdges)
{
var sr = group.slotRef;
var fromNode = graphObject.graph.GetNodeFromGuid(sr.nodeGuid);
var fromSlot = fromNode.FindOutputSlot<MaterialSlot>(sr.slotId);
IShaderProperty prop;
switch (fromSlot.concreteValueType)
{
case ConcreteSlotValueType.Texture2D:
prop = new TextureShaderProperty();
break;
case ConcreteSlotValueType.Vector4:
prop = new Vector4ShaderProperty();
break;
case ConcreteSlotValueType.Vector3:
prop = new Vector3ShaderProperty();
break;
case ConcreteSlotValueType.Vector2:
prop = new Vector2ShaderProperty();
break;
case ConcreteSlotValueType.Vector1:
prop = new FloatShaderProperty();
break;
default:
throw new ArgumentOutOfRangeException();
}
if (prop != null)
{
subGraph.AddShaderProperty(prop);
var propNode = new PropertyNode();
subGraph.AddNode(propNode);
propNode.propertyGuid = prop.guid;
foreach (var edge in group.edges)
{
subGraph.Connect(
new SlotReference(propNode.guid, PropertyNode.OutputSlotId),
new SlotReference(nodeGuidMap[edge.inputSlot.nodeGuid], edge.inputSlot.slotId));
externalInputNeedingConnection.Add(new KeyValuePair<IEdge, IShaderProperty>(edge, prop));
}
}
}
var uniqueOutgoingEdges = externalInputSlots.GroupBy(
edge => edge.inputSlot,
edge => edge,
(key, edges) => new {slot = key, edges = edges.ToList()});
var externalOutputsNeedingConnection = new List<KeyValuePair<IEdge, IEdge>>();
foreach (var group in uniqueOutgoingEdges)
{
var outputNode = subGraph.outputNode;
var slotId = outputNode.AddSlot();
var inputSlotRef = new SlotReference(outputNode.guid, slotId);
foreach (var edge in group.edges)
{
var newEdge = subGraph.Connect(new SlotReference(nodeGuidMap[edge.outputSlot.nodeGuid], edge.outputSlot.slotId), inputSlotRef);
externalOutputsNeedingConnection.Add(new KeyValuePair<IEdge, IEdge>(edge, newEdge));
}
}
File.WriteAllText(path, EditorJsonUtility.ToJson(subGraph));
AssetDatabase.ImportAsset(path);
var loadedSubGraph = AssetDatabase.LoadAssetAtPath(path, typeof(MaterialSubGraphAsset)) as MaterialSubGraphAsset;
if (loadedSubGraph == null)
return;
var subGraphNode = new SubGraphNode();
var ds = subGraphNode.drawState;
ds.position = new Rect(middle, Vector2.one);
subGraphNode.drawState = ds;
graphObject.graph.AddNode(subGraphNode);
subGraphNode.subGraphAsset = loadedSubGraph;
foreach (var edgeMap in externalInputNeedingConnection)
{
graphObject.graph.Connect(edgeMap.Key.outputSlot, new SlotReference(subGraphNode.guid, edgeMap.Value.guid.GetHashCode()));
}
foreach (var edgeMap in externalOutputsNeedingConnection)
{
graphObject.graph.Connect(new SlotReference(subGraphNode.guid, edgeMap.Value.inputSlot.slotId), edgeMap.Key.inputSlot);
}
graphObject.graph.RemoveElements(
graphView.selection.OfType<MaterialNodeView>().Select(x => x.node as INode),
Enumerable.Empty<IEdge>());
graphObject.graph.ValidateGraph();
}
void UpdateAbstractSubgraphOnDisk<T>(string path) where T : AbstractSubGraph
{
var graph = graphObject.graph as T;
if (graph == null)
return;
File.WriteAllText(path, EditorJsonUtility.ToJson(graph, true));
AssetDatabase.ImportAsset(path);
}
void UpdateShaderGraphOnDisk(string path)
{
var graph = graphObject.graph as IShaderGraph;
if (graph == null)
return;
List<PropertyCollector.TextureInfo> configuredTextures;
graph.GetShader(Path.GetFileNameWithoutExtension(path), GenerationMode.ForReals, out configuredTextures);
var shaderImporter = AssetImporter.GetAtPath(path) as ShaderGraphImporter;
if (shaderImporter == null)
return;
File.WriteAllText(path, EditorJsonUtility.ToJson(graph, true));
shaderImporter.SaveAndReimport();
AssetDatabase.ImportAsset(path);
}
private void Rebuild()
{
if (graphObject != null && graphObject.graph != null)
{
var subNodes = graphObject.graph.GetNodes<AbstractSubGraphNode>();
foreach (var node in subNodes)
node.UpdateSlots();
}
}
public void ChangeSelection(string newSelectionGuid, Type graphType)
{
var asset = AssetDatabase.LoadAssetAtPath<Object>(AssetDatabase.GUIDToAssetPath(newSelectionGuid));
if (asset == null)
return;
if (!EditorUtility.IsPersistent(asset))
return;
if (selectedGuid == newSelectionGuid)
return;
selectedGuid = newSelectionGuid;
var path = AssetDatabase.GetAssetPath(asset);
var textGraph = File.ReadAllText(path, Encoding.UTF8);
graphObject = CreateInstance<SerializableGraphObject>();
graphObject.hideFlags = HideFlags.HideAndDontSave;
graphObject.graph = JsonUtility.FromJson(textGraph, graphType) as IGraph;
graphObject.graph.OnEnable();
graphObject.graph.ValidateGraph();
graphEditorView = new GraphEditorView(m_GraphObject.graph as AbstractMaterialGraph, asset.name) { persistenceKey = AssetDatabase.GUIDToAssetPath(selectedGuid) };
graphEditorView.RegisterCallback<PostLayoutEvent>(OnPostLayout);
titleContent = new GUIContent(asset.name);
Repaint();
}
void OnPostLayout(PostLayoutEvent evt)
{
graphEditorView.UnregisterCallback<PostLayoutEvent>(OnPostLayout);
graphEditorView.graphView.FrameAll();
}
}
}