void UpdateShaders()
{
if (m_DirtyShaders.Any())
{
PropagateNodeSet(m_DirtyShaders);
var masterNodes = new List <INode>();
var uberNodes = new List <INode>();
foreach (var index in m_DirtyShaders)
{
var node = m_Graph.GetNodeFromTempId(m_Identifiers[index]);
if (node == null)
{
continue;
}
var masterNode = node as IMasterNode;
if (masterNode != null)
{
masterNodes.Add(node);
}
else
{
uberNodes.Add(node);
}
}
var count = Math.Min(uberNodes.Count, 1) + masterNodes.Count;
try
{
var i = 0;
EditorUtility.DisplayProgressBar("Shader Graph", string.Format("Compiling preview shaders ({0}/{1})", i, count), 0f);
foreach (var node in masterNodes)
{
UpdateShader(node.tempId);
i++;
EditorUtility.DisplayProgressBar("Shader Graph", string.Format("Compiling preview shaders ({0}/{1})", i, count), 0f);
}
if (uberNodes.Count > 0)
{
var results = m_Graph.GetUberPreviewShader();
m_OutputIdName = results.outputIdProperty.referenceName;
ShaderUtil.UpdateShaderAsset(m_UberShader, results.shader);
#if UNITY_SHADER_GRAPH_DEVMODE
File.WriteAllText(Application.dataPath + "/../UberShader.shader", (results.shader ?? "null").Replace("UnityEngine.MaterialGraph", "Generated"));
#endif
bool uberShaderHasError = false;
if (MaterialGraphAsset.ShaderHasError(m_UberShader))
{
var errors = MaterialGraphAsset.GetShaderErrors(m_UberShader);
var message = new ShaderStringBuilder();
message.AppendLine(@"Preview shader for graph has {0} error{1}:", errors.Length, errors.Length != 1 ? "s" : "");
foreach (var error in errors)
{
INode node;
try
{
node = results.sourceMap.FindNode(error.line);
}
catch (Exception e)
{
Debug.LogException(e);
continue;
}
message.AppendLine("{0} in {3} at line {1} (on {2})", error.message, error.line, error.platform, node != null ? string.Format("node {0} ({1})", node.name, node.guid) : "graph");
message.AppendLine(error.messageDetails);
message.AppendNewLine();
}
Debug.LogWarning(message.ToString());
ShaderUtil.ClearShaderErrors(m_UberShader);
ShaderUtil.UpdateShaderAsset(m_UberShader, k_EmptyShader);
uberShaderHasError = true;
}
foreach (var node in uberNodes)
{
var renderData = GetRenderData(node.tempId);
if (renderData == null)
{
continue;
}
var shaderData = renderData.shaderData;
shaderData.shader = m_UberShader;
shaderData.hasError = uberShaderHasError;
}
i++;
EditorUtility.DisplayProgressBar("Shader Graph", string.Format("Compiling preview shaders ({0}/{1})", i, count), 0f);
}
}
finally
{
EditorUtility.ClearProgressBar();
}
// Union dirty shaders into dirty previews
m_DirtyPreviews.UnionWith(m_DirtyShaders);
m_DirtyShaders.Clear();
}
}
