/// <summary> /// Creates a working copy of the specified nodeCanvas, and optionally also of it's associated editorStates. /// This breaks the link of this object to any stored assets and references. That means, that all changes to this object will have to be explicitly saved. /// </summary> public static NodeCanvas CreateWorkingCopy(NodeCanvas nodeCanvas, bool editorStates) { nodeCanvas.Validate(); nodeCanvas = Clone(nodeCanvas); // Take each SO, make a clone of it and store both versions in the respective list // This will only iterate over the 'source instances' List <ScriptableObject> allSOs = new List <ScriptableObject> (); List <ScriptableObject> clonedSOs = new List <ScriptableObject> (); for (int nodeCnt = 0; nodeCnt < nodeCanvas.nodes.Count; nodeCnt++) { Node node = nodeCanvas.nodes[nodeCnt]; node.FixNode(); node.CheckNodeKnobMigration(); // Clone Node and additional scriptableObjects Node clonedNode = AddClonedSO(allSOs, clonedSOs, node); AddClonedSOs(allSOs, clonedSOs, clonedNode.GetScriptableObjects()); foreach (NodeKnob knob in clonedNode.nodeKnobs) { // Clone NodeKnobs and additional scriptableObjects if (knob == null) { continue; } AddClonedSO(allSOs, clonedSOs, knob); AddClonedSOs(allSOs, clonedSOs, knob.GetScriptableObjects()); } } // Replace every reference to any of the initial SOs of the first list with the respective clones of the second list for (int nodeCnt = 0; nodeCnt < nodeCanvas.nodes.Count; nodeCnt++) { // Clone Nodes, structural content and additional scriptableObjects Node node = nodeCanvas.nodes[nodeCnt]; // Replace node and additional ScriptableObjects Node clonedNode = nodeCanvas.nodes[nodeCnt] = ReplaceSO(allSOs, clonedSOs, node); clonedNode.CopyScriptableObjects((ScriptableObject so) => ReplaceSO(allSOs, clonedSOs, so)); // We're going to restore these from NodeKnobs, no need to Replace muliple times clonedNode.Inputs = new List <NodeInput> (); clonedNode.Outputs = new List <NodeOutput> (); for (int knobCnt = 0; knobCnt < clonedNode.nodeKnobs.Count; knobCnt++) { // Clone generic NodeKnobs NodeKnob knob = clonedNode.nodeKnobs[knobCnt] = ReplaceSO(allSOs, clonedSOs, clonedNode.nodeKnobs[knobCnt]); if (knob == null) { continue; } knob.body = clonedNode; // Replace additional scriptableObjects in the NodeKnob knob.CopyScriptableObjects((ScriptableObject so) => ReplaceSO(allSOs, clonedSOs, so)); // Add it into Inputs/Outputs again if (knob is NodeInput) { clonedNode.Inputs.Add(knob as NodeInput); } else if (knob is NodeOutput) { clonedNode.Outputs.Add(knob as NodeOutput); } } } if (editorStates) { nodeCanvas.editorStates = CreateWorkingCopy(nodeCanvas.editorStates, nodeCanvas); foreach (NodeEditorState state in nodeCanvas.editorStates) { state.selectedNode = ReplaceSO(allSOs, clonedSOs, state.selectedNode); } } else { foreach (NodeEditorState state in nodeCanvas.editorStates) { state.selectedNode = null; } } return(nodeCanvas); }