/// <summary>
/// Takes a VRML97 parse tree (see also <seealso cref="Parser"/>)
/// and resolves all DEF and USE nodes.
/// </summary>
/// <param name="root">Parse tree.</param>
/// <param name="duplicateMaps"></param>
/// <param name="namedNodes"></param>
/// <returns>Parse tree without DEF and USE nodes.</returns>
public Vrml97Scene Perform(Vrml97Scene root, out Dictionary <string, SymMapBase> namedNodes, bool duplicateMaps)
{
root.ParseTree["DefUseResolver.Performed"] = true; // leave hint
m_defs = new Dictionary <string, SymMapBase>();
SymMapBaseTraversal trav = new SymMapBaseTraversal();
trav.PerNameVisitors["USE"] = (map, visit) =>
{
// Lookup USE name and return associated node.
var name = map.Get <string>(Vrml97Sym.name);
SymMapBase node;
if (!m_defs.TryGetValue(name, out node))
{
Report.Warn("DefUseResolver: USE " + name + ": Unknown!");
return(map); // keep "USE" ref node in SymMap-Tree
//throw new Exception("DefUseResolver: USE " + name + ": Unknown!");
}
return(duplicateMaps ? new SymMapBase(node) : node);
};
trav.PerNameVisitors["DEF"] = (map, visit) =>
{
// Register name/node pair.
string defName = map.Get <string>(Vrml97Sym.name);
SymMapBase node = map.Get <SymMapBase>(Vrml97Sym.node);
m_defs[defName] = node;
node["DEFname"] = defName;
return(node);
};
trav.Traverse(root.ParseTree);
namedNodes = m_defs;
return(root);
}
/// <summary>
/// Takes a Vrml97 parse tree (see also <seealso cref="Parser"/>)
/// and replaces the file extension of all image texture URLs to
/// the specified extension.
/// </summary>
/// <param name="root">Parse tree.</param>
/// <param name="newExtension"></param>
internal Vrml97Scene Perform(Vrml97Scene root, string newExtension)
{
SymMapBaseTraversal trav = new SymMapBaseTraversal(SymMapBaseTraversal.Visit.Post);
trav.PerNameVisitors["ImageTexture"] =
delegate(SymMapBase m, SymMapBaseTraversal.Visit visit)
{
List <string> urls = m.Get <List <string> >(Vrml97Sym.url);
if (urls == null)
{
return(m);
}
for (int i = 0; i < urls.Count; i++)
{
int p = urls[i].LastIndexOf('.');
urls[i] = urls[i].Substring(0, p) + "." + newExtension;
}
return(m);
};
trav.Traverse(root.ParseTree);
return(root);
}
/// <summary>
/// Takes a Vrml97 parse tree (see also <seealso cref="Parser"/>)
/// and augments all geometry nodes with material and
/// transform attributes.
/// </summary>
/// <param name="root">Parse tree.</param>
/// <returns>Augmented parse tree.</returns>
public Vrml97Scene Perform(Vrml97Scene root)
{
root.ParseTree["AttributeAnnotator.Performed"] = true; // leave hint
if (root.ParseTree.TypeName == "Vrml97")
{
string filename = root.ParseTree.Get <string>(Vrml97Sym.filename);
m_path = Path.GetDirectoryName(filename);
}
m_material = new Stack <SymMapBase>();
m_texture = new Stack <SymMapBase>();
m_textureTransform = new Stack <SymMapBase>();
m_transform = new Stack <Trafo3d>();
m_transform.Push(Trafo3d.Identity);
SymMapBaseTraversal trav = new SymMapBaseTraversal(SymMapBaseTraversal.Mode.Modifying, SymMapBaseTraversal.Visit.PreAndPost);
trav.PerNameVisitors["ImageTexture"] =
delegate(SymMapBase m, SymMapBaseTraversal.Visit visit)
{
if (visit == SymMapBaseTraversal.Visit.Pre)
{
if (m_visited.ContainsKey(m))
{
return(m);
}
List <string> urls = m.Get <List <string> >(Vrml97Sym.url);
if (urls != null)
{
for (int i = 0; i < urls.Count; i++)
{
urls[i] = Path.Combine(m_path, urls[i]);
}
}
m_visited[m] = m;
}
return(m);
};
// geometry nodes
SymMapBaseVisitor foo = (SymMapBase m, SymMapBaseTraversal.Visit visit) =>
{
if (visit == SymMapBaseTraversal.Visit.Post)
{
return(m);
}
if (m_material.Count == 0 &&
m_texture.Count == 0 &&
m_textureTransform.Count == 0 &&
m_transform.Count == 0)
{
return(m);
}
var map = new SymMapBase(m);
if (m_material.Count > 0)
{
string key = "material";
// while (m.Contains(key)) key += "X";
map[key] = m_material.Peek();
}
if (m_texture.Count > 0)
{
string key = "texture";
// while (m.Contains(key)) key += "X";
map[key] = m_texture.Peek();
}
if (m_textureTransform.Count > 0)
{
string key = "textureTransform";
// while (m.Contains(key)) key += "X";
var tt = m_textureTransform.Peek();
map[key] = tt.ExtractVrmlTextureTrafo();
}
if (m_transform.Count > 1) // [0] contains initial identity
{
string key = "transform";
// while (m.Contains(key)) key += "X";
if (m.Contains(key))
{
Console.WriteLine("WARNING: trying to annotate annotated node!");
}
map[key] = m_transform.Peek();
}
return(map);
};
trav.PerNameVisitors["IndexedFaceSet"] = foo;
trav.PerNameVisitors["IndexedLineSet"] = foo;
// attributes
trav.PerNameVisitors["Shape"] =
delegate(SymMapBase m, SymMapBaseTraversal.Visit visit)
{
bool hasMaterial = false;
bool hasTexture = false;
bool hasTextureTransform = false;
SymMapBase app = null;
if (m.Contains("appearance"))
{
app = m.Get <SymMapBase>(Vrml97Sym.appearance);
hasMaterial = app.Contains(Vrml97Sym.material);
hasTexture = app.Contains(Vrml97Sym.texture);
hasTextureTransform = app.Contains(Vrml97Sym.textureTransform);
}
if (visit == SymMapBaseTraversal.Visit.Pre)
{
if (hasMaterial)
{
m_material.Push(app.Get <SymMapBase>(Vrml97Sym.material));
}
if (hasTexture)
{
m_texture.Push(app.Get <SymMapBase>(Vrml97Sym.texture));
}
if (hasTextureTransform)
{
m_textureTransform.Push(app.Get <SymMapBase>(Vrml97Sym.textureTransform));
}
}
else if (visit == SymMapBaseTraversal.Visit.Post)
{
if (hasMaterial)
{
m_material.Pop();
}
if (hasTexture)
{
m_texture.Pop();
}
if (hasTextureTransform)
{
m_textureTransform.Pop();
}
}
return(m);
};
trav.PerNameVisitors["Transform"] =
delegate(SymMapBase m, SymMapBaseTraversal.Visit visit)
{
if (visit == SymMapBaseTraversal.Visit.Pre)
{
var trafo = m.ExtractVrmlGeometryTrafo();
m["trafo"] = trafo;
m_transform.Push(trafo * m_transform.Peek());
}
else if (visit == SymMapBaseTraversal.Visit.Post)
{
m_transform.Pop();
}
return(m);
};
root.ParseTree = trav.Traverse(root.ParseTree);
return(root);
}