/// <summary>
/// Imports the texture node where the xml reader is currently located.
/// </summary>
/// <param name="inStreamXml">The xml reader object.</param>
/// <param name="container">The container where to import to.</param>
/// <param name="xglImportOptions">Current import options.</param>
private void ImportMesh(XmlReader inStreamXml, ImportedModelContainer container, XglImportOptions xglImportOptions)
{
string id = inStreamXml.GetAttribute("ID");
VertexStructure actVertexStructure = new VertexStructure();
int minVertexID = int.MaxValue;
int actVertexIndex = -1;
int actNormalIndex = -1;
int actTextureIndex = -1;
Vertex actTempVertex = Vertex.Empty;
int[] actFaceReferences = new int[3];
Dictionary <int, MaterialProperties> localMaterialInfos = new Dictionary <int, MaterialProperties>();
while (inStreamXml.Read())
{
// Ending condition
if ((inStreamXml.NodeType == XmlNodeType.EndElement) &&
(inStreamXml.Name == NODE_NAME_MESH))
{
break;
}
// Continue condition
if (inStreamXml.NodeType != XmlNodeType.Element)
{
continue;
}
switch (inStreamXml.Name)
{
case NODE_NAME_SURFACE:
// If this tag is present, faces will be visible from both sides. If this flag is absent, faces will be visible from only one side as described in the <F> tag
break;
case NODE_NAME_MAT:
// Read the next material
var materialAndID = ImportMaterial(inStreamXml, container, xglImportOptions);
localMaterialInfos[materialAndID.Item1] = materialAndID.Item2;
break;
case NODE_NAME_PATCH:
// A patch is a group of faces
// We don't need to handle this one
break;
case NODE_NAME_POINT:
// Read next point
if (minVertexID == int.MaxValue)
{
minVertexID = Int32.Parse(inStreamXml.GetAttribute("ID"));
}
actVertexIndex++;
actTempVertex = actVertexStructure.EnsureVertexAt(actVertexIndex);
actTempVertex.Color = Color4.White;
inStreamXml.Read();
actTempVertex.Position = inStreamXml.ReadContentAsVector3() * xglImportOptions.ResizeFactor;
actVertexStructure.Vertices[actVertexIndex] = actTempVertex;
break;
case NODE_NAME_NORMAL:
// Read next normal
if (minVertexID == int.MaxValue)
{
minVertexID = Int32.Parse(inStreamXml.GetAttribute("ID"));
}
actNormalIndex++;
actTempVertex = actVertexStructure.EnsureVertexAt(actNormalIndex);
inStreamXml.Read();
actTempVertex.Normal = inStreamXml.ReadContentAsVector3();
actVertexStructure.Vertices[actNormalIndex] = actTempVertex;
break;
case NODE_NAME_TC:
// Read next texture coordinate
if (minVertexID == int.MaxValue)
{
minVertexID = Int32.Parse(inStreamXml.GetAttribute("ID"));
}
actTextureIndex++;
actTempVertex = actVertexStructure.EnsureVertexAt(actTextureIndex);
inStreamXml.Read();
actTempVertex.TexCoord = inStreamXml.ReadContentAsVector2();
actVertexStructure.Vertices[actTextureIndex] = actTempVertex;
break;
case NODE_NAME_FACE:
// Read next face
actFaceReferences[0] = 0;
actFaceReferences[1] = 0;
actFaceReferences[2] = 0;
int loopFacePoint = 0;
int referencedMat = -1;
int referencedTexture = -1;
while (inStreamXml.Read())
{
// Ending condition
if ((inStreamXml.NodeType == XmlNodeType.EndElement) &&
(inStreamXml.Name == NODE_NAME_FACE))
{
break;
}
if (inStreamXml.NodeType != XmlNodeType.Element)
{
continue;
}
// Read next face index
if (inStreamXml.Name == NODE_NAME_FACE_MATERIAL_REF)
{
inStreamXml.Read();
referencedMat = inStreamXml.ReadContentAsInt();
}
else if (inStreamXml.Name == NODE_NAME_FACE_TEXTUREREF_REF)
{
inStreamXml.Read();
referencedTexture = inStreamXml.ReadContentAsInt();
}
else if (inStreamXml.Name == NODE_NAME_FACE_POINT_REF)
{
if (loopFacePoint >= 3)
{
throw new SeeingSharpGraphicsException("Invalid face index count!");
}
inStreamXml.Read();
actFaceReferences[loopFacePoint] = inStreamXml.ReadContentAsInt() - minVertexID;
loopFacePoint++;
}
else
{
}
}
// Get the correct material
MaterialProperties referencedMatObject = MaterialProperties.Empty;
if (referencedMat > -1)
{
localMaterialInfos.TryGetValue(referencedMat, out referencedMatObject);
}
if (referencedTexture > -1)
{
referencedMatObject = referencedMatObject.Clone();
referencedMatObject.TextureKey = container.GetResourceKey(RES_CLASS_TEXTURE, referencedTexture.ToString());
}
//for (int actFaceLoc = 0; actFaceLoc < 3; actFaceLoc++)
//{
// int actVertexIndexInner = actFaceReferences[actFaceLoc];
// actTempVertex = actVertexStructure.Vertices[actVertexIndexInner];
// actTempVertex.Color = referencedMatObject.DiffuseColor;
// actVertexStructure.Vertices[actVertexIndexInner] = actTempVertex;
//}
// Add the triangle
if (loopFacePoint != 3)
{
throw new SeeingSharpGraphicsException("Invalid face index count!");
}
actVertexStructure
.CreateOrGetExistingSurface(referencedMatObject)
.AddTriangle(actFaceReferences[0], actFaceReferences[1], actFaceReferences[2]);
break;
default:
//throw new SeeingSharpGraphicsException(string.Format(
// "Unknown element {0} in xgl file!",
// inStreamXml.Name));
break;
}
}
// Add the geometry resource
container.ImportedResources.Add(new ImportedResourceInfo(
container.GetResourceKey(RES_CLASS_MESH, id),
() => new GeometryResource(actVertexStructure)));
}