public Node FindNodeFromId(HyperGraph.IGraphModel graph, UInt64 id)
{
foreach (Node n in graph.Nodes)
{
if (n.Tag is ShaderFragmentNodeTag &&
((ShaderFragmentNodeTag)n.Tag).Id == (UInt64)id)
{
return(n);
}
}
return(null);
}
//
// Convert from the "ViewModel" to the "Model"
//
// We don't maintain the ShaderPatcherLayer.NodeGraph representation
// permanently... But we need this for serialization and shader
// generation operations
//
// So, let's just build it from the graph control object.
//
public ShaderPatcherLayer.NodeGraph ToShaderPatcherLayer(HyperGraph.IGraphModel graph)
{
ShaderPatcherLayer.NodeGraph nodeGraph = new ShaderPatcherLayer.NodeGraph();
Dictionary <Node, int> nodeToVisualNodeId = new Dictionary <Node, int>();
foreach (Node n in graph.Nodes)
{
var nTag = n.Tag as ShaderFragmentNodeTag;
if (nTag == null)
{
continue;
}
// Create a "visual node" (unless it already exists)
// -- this contains information that only affects the rendered
// graphs, not the output shader
int visualNodeId;
if (nodeToVisualNodeId.ContainsKey(n))
{
visualNodeId = nodeToVisualNodeId[n];
}
else
{
visualNodeId = nodeGraph.VisualNodes.Count();
nodeToVisualNodeId.Add(n, visualNodeId);
nodeGraph.VisualNodes.Add(
new ShaderPatcherLayer.VisualNode()
{
Location = n.Location,
State = (n.Collapsed) ? ShaderPatcherLayer.VisualNode.StateType.Collapsed : ShaderPatcherLayer.VisualNode.StateType.Normal
});
}
// Potentially build a "node" in the patcher layer. This is only required
// if we're referencing some object in the shader fragments archive
if (!string.IsNullOrEmpty(nTag.ArchiveName))
{
ShaderPatcherLayer.Node resultNode = new ShaderPatcherLayer.Node()
{
FragmentArchiveName = nTag.ArchiveName, NodeId = nTag.Id,
VisualNodeId = visualNodeId
};
if (n.Tag is ShaderParameterNodeTag)
{
// This is a hack... But there should be a drop down list that
// can tell us the type of this parameter struct box.
foreach (var i in n.Items)
{
if (i is HyperGraph.Items.NodeDropDownItem)
{
var dropDown = (HyperGraph.Items.NodeDropDownItem)i;
var stringForm = dropDown.Items[dropDown.SelectedIndex];
var parameterSource = ShaderFragmentNodeCreator.AsEnumValue <ShaderFragmentArchive.Parameter.SourceType>(stringForm, ShaderFragmentNodeCreator.ParamSourceTypeNames);
resultNode.NodeType = AsNodeType(parameterSource);
}
}
}
else
{
resultNode.NodeType = ShaderPatcherLayer.Node.Type.Procedure;
}
nodeGraph.Nodes.Add(resultNode);
}
// Build connections...
foreach (NodeConnection connection in n.Connections)
{
if (connection.To != null)
{
var dstNode = connection.To.Node.Tag as ShaderFragmentNodeTag;
if (dstNode == null)
{
continue;
}
var dstItem = connection.To.Item as ShaderFragmentNodeItem;
if (dstItem == null)
{
continue;
}
if (connection.From == null && connection.To.Node == n)
{
// this is a direct constant connection. It connects the value either to a constant value, or some named variable
nodeGraph.ConstantConnections.Add(
new ShaderPatcherLayer.ConstantConnection()
{
Value = connection.Name,
OutputNodeID = dstNode.Id, OutputParameterName = dstItem.Name
});
}
else if (connection.To.Node == n && connection.To.Item is ShaderFragmentInterfaceParameterItem)
{
// this is an output parameter. This is the only case where we creating the connection
// while processing the node on the "out" side
var outputParam = (ShaderFragmentInterfaceParameterItem)connection.To.Item;
var resultConnection = new ShaderPatcherLayer.OutputParameterConnection
{
VisualNodeId = visualNodeId, // (visual node for the output box)
Type = outputParam.Type,
Name = outputParam.Name,
Semantic = outputParam.Semantic
};
if (connection.From.Item is ShaderFragmentNodeItem)
{
var tag = connection.From.Item.Node.Tag as ShaderFragmentNodeTag;
if (tag != null)
{
resultConnection.InputNodeID = tag.Id;
}
resultConnection.InputParameterName = ((ShaderFragmentNodeItem)connection.From.Item).Name;
}
nodeGraph.OutputParameterConnections.Add(resultConnection);
}
else if (connection.From.Node == n)
{
if (connection.From.Item is ShaderFragmentInterfaceParameterItem)
{
// it's an input parameter... we just need type, name, semantic
var inputParam = (ShaderFragmentInterfaceParameterItem)connection.From.Item;
nodeGraph.InputParameterConnections.Add(
new ShaderPatcherLayer.InputParameterConnection
{
OutputNodeID = dstNode.Id,
OutputParameterName = dstItem.Name,
VisualNodeId = visualNodeId,
Type = inputParam.Type,
Name = inputParam.Name,
Semantic = inputParam.Semantic,
Default = inputParam.Default
});
}
else if (connection.To.Item is ShaderFragmentInterfaceParameterItem)
{
// it's an output parameter...
// this will be handled when processing the node on the out side
}
else
{
// This is an output to the next node
var resultConnection = new ShaderPatcherLayer.NodeConnection()
{
InputNodeID = nTag.Id,
OutputNodeID = dstNode.Id,
OutputParameterName = dstItem.Name,
OutputType = TypeFromNodeItem(dstItem)
};
if (connection.From.Item is ShaderFragmentNodeItem)
{
var sourceItem = (ShaderFragmentNodeItem)connection.From.Item;
resultConnection.InputParameterName = sourceItem.Name;
resultConnection.InputType = TypeFromNodeItem(sourceItem);
}
nodeGraph.NodeConnections.Add(resultConnection);
}
}
}
else if (connection.From != null && connection.From.Node == n)
{
// when connection.To is null, it could be an attached output connection
var resultConnection = new ShaderPatcherLayer.OutputParameterConnection()
{
Name = connection.Name,
InputNodeID = nTag.Id
};
if (connection.From.Item is ShaderFragmentNodeItem)
{
var sourceItem = (ShaderFragmentNodeItem)connection.From.Item;
resultConnection.InputParameterName = sourceItem.Name;
resultConnection.Type = TypeFromNodeItem(sourceItem);
}
nodeGraph.OutputParameterConnections.Add(resultConnection);
}
}
// build the preview settings objects
foreach (var i in n.Items)
{
var preview = i as ShaderFragmentPreviewItem;
if (preview == null)
{
continue;
}
var settings = preview.PreviewSettings;
settings.VisualNodeId = visualNodeId;
nodeGraph.PreviewSettingsObjects.Add(settings);
}
}
return(nodeGraph);
}
public void AddToHyperGraph(ShaderPatcherLayer.NodeGraph nodeGraph, HyperGraph.IGraphModel graph)
{
//
// Convert from the "ShaderPatcherLayer" representation back to
// our graph control nodes.
//
// This is required for robust serialisation. We can't easily
// serialise in and out the graph control objects directly, because
// it risks problems if the rendering code or shader fragment objects
// change. That is, it's not very version-robust.
//
// It's better to serialise a slightly higher level representation
// that just contains the node names and connections. That way, we
// can adapt to changes in the tool and data.
//
{
// --------< Basic Nodes >--------
var newNodes = new Dictionary <int, Node>();
var nodeIdToControlNode = new Dictionary <UInt64, Node>();
foreach (var n in nodeGraph.Nodes)
{
if (!newNodes.ContainsKey(n.VisualNodeId))
{
var visualNode = nodeGraph.VisualNodes[n.VisualNodeId];
// also look for preview settings...
var previewSettings = nodeGraph.PreviewSettingsObjects.Where(x => x.VisualNodeId == n.VisualNodeId).FirstOrDefault();
Node newNode = null;
if (n.NodeType == ShaderPatcherLayer.Node.Type.Procedure)
{
var fn = _shaderFragments.GetFunction(n.FragmentArchiveName);
newNode = _nodeCreator.CreateNode(fn, n.FragmentArchiveName, previewSettings);
}
else
{
var ps = _shaderFragments.GetParameterStruct(n.FragmentArchiveName);
newNode = _nodeCreator.CreateParameterNode(ps, n.FragmentArchiveName, AsSourceType(n.NodeType));
}
if (newNode != null)
{
MatchVisualNode(newNode, visualNode);
newNodes[n.VisualNodeId] = newNode;
nodeIdToControlNode[n.NodeId] = newNode;
}
}
}
graph.AddNodes(newNodes.Values);
// --------< Node Connections >--------
foreach (var c in nodeGraph.NodeConnections)
{
if (nodeIdToControlNode.ContainsKey(c.InputNodeID) && nodeIdToControlNode.ContainsKey(c.OutputNodeID))
{
var inputItem = FindOrCreateNodeItem(nodeIdToControlNode[c.InputNodeID],
(item) => (item.Output != null && item.Output.Enabled && item is ShaderFragmentNodeItem && ((ShaderFragmentNodeItem)item).Name.Equals(c.InputParameterName)),
() => new ShaderFragmentNodeItem(c.InputParameterName, c.InputType, null, false, true));
var outputItem = FindOrCreateNodeItem(nodeIdToControlNode[c.OutputNodeID],
(item) => (item.Input != null && item.Input.Enabled && item is ShaderFragmentNodeItem && ((ShaderFragmentNodeItem)item).Name.Equals(c.OutputParameterName)),
() => new ShaderFragmentNodeItem(c.OutputParameterName, c.OutputType, null, true, false));
graph.Connect(inputItem.Output, outputItem.Input);
}
}
// --------< Constant Connections >--------
foreach (var c in nodeGraph.ConstantConnections)
{
if (nodeIdToControlNode.ContainsKey(c.OutputNodeID))
{
var node = nodeIdToControlNode[c.OutputNodeID];
var outputItem = FindOrCreateNodeItem(node,
(item) => (item.Input != null && item.Input.Enabled && item is ShaderFragmentNodeItem && ((ShaderFragmentNodeItem)item).Name.Equals(c.OutputParameterName)),
() => new ShaderFragmentNodeItem(c.OutputParameterName, "float", null, true, false));
var connection = new NodeConnection();
connection.To = outputItem.Input;
connection.Name = c.Value;
node.AddConnection(connection);
}
}
// --------< Input Parameter Connections >--------
foreach (var c in nodeGraph.InputParameterConnections)
{
if (!nodeIdToControlNode.ContainsKey(c.OutputNodeID))
{
continue;
}
var dstItem = FindOrCreateNodeItem(
nodeIdToControlNode[c.OutputNodeID],
(item) => (item.Input != null && item.Input.Enabled && item is ShaderFragmentNodeItem && ((ShaderFragmentNodeItem)item).Name.Equals(c.OutputParameterName)),
() => new ShaderFragmentNodeItem(c.OutputParameterName, c.Type, null, true, false));
Node srcNode;
if (!newNodes.ContainsKey(c.VisualNodeId))
{
srcNode = _nodeCreator.CreateInterfaceNode("Inputs", InterfaceDirection.In);
MatchVisualNode(srcNode, nodeGraph.VisualNodes[c.VisualNodeId]);
newNodes[c.VisualNodeId] = srcNode;
graph.AddNode(srcNode);
}
else
{
srcNode = newNodes[c.VisualNodeId];
}
var srcItem = FindOrCreateNodeItem(
srcNode,
(item) => {
var i = item as ShaderFragmentInterfaceParameterItem;
if (i == null)
{
return(false);
}
return(i.Name.Equals(c.Name) && i.Type.Equals(c.Type) && i.Semantic.Equals(c.Semantic));
},
() => new ShaderFragmentInterfaceParameterItem(c.Name, c.Type, InterfaceDirection.In)
{
Semantic = c.Semantic, Default = c.Default
});
graph.Connect(srcItem.Output, dstItem.Input);
}
// --------< Output Parameter Connections >--------
foreach (var c in nodeGraph.OutputParameterConnections)
{
if (!nodeIdToControlNode.ContainsKey(c.InputNodeID))
{
continue;
}
var srcItem = FindOrCreateNodeItem(
nodeIdToControlNode[c.InputNodeID],
(item) => (item.Output != null && item.Output.Enabled && item is ShaderFragmentNodeItem && ((ShaderFragmentNodeItem)item).Name.Equals(c.InputParameterName)),
() => new ShaderFragmentNodeItem(c.InputParameterName, c.Type, null, false, true));
Node dstNode;
if (!newNodes.ContainsKey(c.VisualNodeId))
{
dstNode = _nodeCreator.CreateInterfaceNode("Outputs", InterfaceDirection.Out);
MatchVisualNode(dstNode, nodeGraph.VisualNodes[c.VisualNodeId]);
newNodes[c.VisualNodeId] = dstNode;
graph.AddNode(dstNode);
}
else
{
dstNode = newNodes[c.VisualNodeId];
}
var dstItem = FindOrCreateNodeItem(
dstNode,
(item) =>
{
var i = item as ShaderFragmentInterfaceParameterItem;
if (i == null)
{
return(false);
}
return(i.Name.Equals(c.Name) && i.Type.Equals(c.Type) && i.Semantic.Equals(c.Semantic));
},
() => new ShaderFragmentInterfaceParameterItem(c.Name, c.Type, InterfaceDirection.Out)
{
Semantic = c.Semantic
});
graph.Connect(srcItem.Output, dstItem.Input);
}
}
}