/// <summary>
/// Loads the indexed normal vectors for a mesh
/// </summary>
/// <param name="meshNormalData"></param>
/// <returns></returns>
IndexedMeshNormals LoadMeshNormals(IXDataObject dataObject)
{
IndexedMeshNormals indexedMeshNormals = new IndexedMeshNormals();
Match normalCount = findArrayCount.Match(dataObject.Body);
if(!normalCount.Success)
throw new System.IO.InvalidDataException("problem reading mesh normals count");
indexedMeshNormals.normalVectors = new List<Vector4F>();
int normals = int.Parse(normalCount.Groups[1].Value, CultureInfo.InvariantCulture);
int dataOffset = normalCount.Index + normalCount.Length;
for(int normalIndex = 0; normalIndex < normals; normalIndex++)
{
Match normal = findVector3F.Match(dataObject.Body, dataOffset);
if(!normal.Success)
throw new System.IO.InvalidDataException("problem reading mesh normal vector");
else
dataOffset = normal.Index + normal.Length;
indexedMeshNormals.normalVectors.Add(
new Vector4F(
float.Parse(normal.Groups[1].Value, CultureInfo.InvariantCulture),
float.Parse(normal.Groups[2].Value, CultureInfo.InvariantCulture),
float.Parse(normal.Groups[3].Value, CultureInfo.InvariantCulture),
1.0f));
}
Match faceNormalCount = findArrayCount.Match(dataObject.Body, dataOffset);
if(!faceNormalCount.Success)
throw new System.IO.InvalidDataException("problem reading mesh normals count");
indexedMeshNormals.normalIndexMap = new List<Int32>();
int faceCount = int.Parse(faceNormalCount.Groups[1].Value, CultureInfo.InvariantCulture);
dataOffset = faceNormalCount.Index + faceNormalCount.Length;
for(int faceNormalIndex = 0; faceNormalIndex < faceCount; faceNormalIndex++)
{
Match normalFace = findVertexIndex.Match(dataObject.Body, dataOffset);
if(!normalFace.Success)
throw new System.IO.InvalidDataException("problem reading mesh normal face");
else
dataOffset = normalFace.Index + normalFace.Length;
string[] vertexIndexes = normalFace.Groups[2].Value.Split(new char[] { ',' });
for(int n = 0; n <= vertexIndexes.Length - 3; n ++)
{
indexedMeshNormals.normalIndexMap.Add(int.Parse(vertexIndexes[0], CultureInfo.InvariantCulture));
indexedMeshNormals.normalIndexMap.Add(int.Parse(vertexIndexes[1 + n], CultureInfo.InvariantCulture));
indexedMeshNormals.normalIndexMap.Add(int.Parse(vertexIndexes[2 + n], CultureInfo.InvariantCulture));
}
}
return indexedMeshNormals;
}
/// <summary>
/// Loads a mesh and creates the vertex/index buffers for the part
/// </summary>
/// <param name="part"></param>
/// <param name="meshData"></param>
void LoadMesh(ref Part part, IXDataObject dataObject)
{
// load vertex data
int dataOffset = 0;
Match vertexCount = findArrayCount.Match(dataObject.Body);
if(!vertexCount.Success)
throw new System.IO.InvalidDataException("problem reading vertex count");
List<Vector4F> vertexList = new List<Vector4F>();
int verticies = int.Parse(vertexCount.Groups[1].Value, CultureInfo.InvariantCulture);
dataOffset = vertexCount.Index + vertexCount.Length;
for(int vertexIndex = 0; vertexIndex < verticies; vertexIndex++)
{
Match vertex = findVector3F.Match(dataObject.Body, dataOffset);
if(!vertex.Success)
throw new System.IO.InvalidDataException("problem reading vertex");
else
dataOffset = vertex.Index + vertex.Length;
vertexList.Add(
new Vector4F(
float.Parse(vertex.Groups[1].Value, CultureInfo.InvariantCulture),
float.Parse(vertex.Groups[2].Value, CultureInfo.InvariantCulture),
float.Parse(vertex.Groups[3].Value, CultureInfo.InvariantCulture),
1.0f));
}
// load triangle index data
Match triangleIndexCount = findArrayCount.Match(dataObject.Body, dataOffset);
dataOffset = triangleIndexCount.Index + triangleIndexCount.Length;
if(!triangleIndexCount.Success)
throw new System.IO.InvalidDataException("problem reading index count");
List<Int32> triangleIndiciesList = new List<Int32>();
int triangleIndexListCount = int.Parse(triangleIndexCount.Groups[1].Value, CultureInfo.InvariantCulture);
dataOffset = triangleIndexCount.Index + triangleIndexCount.Length;
for(int triangleIndicyIndex = 0; triangleIndicyIndex < triangleIndexListCount; triangleIndicyIndex++)
{
Match indexEntry = findVertexIndex.Match(dataObject.Body, dataOffset);
if(!indexEntry.Success)
throw new System.IO.InvalidDataException("problem reading vertex index entry");
else
dataOffset = indexEntry.Index + indexEntry.Length;
int indexEntryCount = int.Parse(indexEntry.Groups[1].Value, CultureInfo.InvariantCulture);
string[] vertexIndexes = indexEntry.Groups[2].Value.Split(new char[] { ',' });
if(indexEntryCount != vertexIndexes.Length)
throw new System.IO.InvalidDataException("vertex index count does not equal count of indicies found");
for(int entryIndex = 0; entryIndex <= indexEntryCount - 3; entryIndex++)
{
triangleIndiciesList.Add(int.Parse(vertexIndexes[0], CultureInfo.InvariantCulture));
triangleIndiciesList.Add(int.Parse(vertexIndexes[1 + entryIndex].ToString(), CultureInfo.InvariantCulture));
triangleIndiciesList.Add(int.Parse(vertexIndexes[2 + entryIndex].ToString(), CultureInfo.InvariantCulture));
}
}
// load mesh colors
IXDataObject vertexColorData = GetSingleChild(dataObject, "MeshVertexColors");
Dictionary<int, Vector4F> colorDictionary = null;
if (vertexColorData != null)
colorDictionary = LoadMeshColors(vertexColorData);
// load mesh normals
IXDataObject meshNormalData = GetSingleChild(dataObject, "MeshNormals");
IndexedMeshNormals meshNormals = null;
if(meshNormalData != null)
{
meshNormals = LoadMeshNormals(meshNormalData);
}
// load mesh texture coordinates
IXDataObject meshTextureCoordsData = GetSingleChild(dataObject, "MeshTextureCoords");
List<Vector2F> meshTextureCoords = null;
if(meshTextureCoordsData != null)
{
meshTextureCoords = LoadMeshTextureCoordinates(meshTextureCoordsData);
}
// load mesh material
IXDataObject meshMaterialsData = GetSingleChild(dataObject, "MeshMaterialList");
List<MaterialSpecification> meshMaterials = null;
if(meshMaterialsData != null)
{
meshMaterials = LoadMeshMaterialList(meshMaterialsData);
}
// copy vertex data to HGLOBAL
int byteLength = Marshal.SizeOf(typeof(XMeshVertex)) * triangleIndiciesList.Count;
IntPtr nativeVertex = Marshal.AllocHGlobal(byteLength);
byte[] byteBuffer = new byte[byteLength];
XMeshVertex[] varray = new XMeshVertex[triangleIndiciesList.Count];
for(int n = 0; n < triangleIndiciesList.Count; n++)
{
XMeshVertex vertex = new XMeshVertex()
{
Vertex = vertexList[triangleIndiciesList[n]],
Normal = (meshNormals == null) ? new Vector4F(0, 0, 0, 1.0f) : meshNormals.normalVectors[meshNormals.normalIndexMap[n]],
Color = ((colorDictionary == null) ? new Vector4F(0, 0, 0, 0) : colorDictionary[triangleIndiciesList[n]]),
Texture = ((meshTextureCoords == null) ? new Vector2F(0, 0) : meshTextureCoords[triangleIndiciesList[n]])
};
byte[] vertexData = RawSerialize(vertex);
Buffer.BlockCopy(vertexData, 0, byteBuffer, vertexData.Length * n, vertexData.Length);
}
Marshal.Copy(byteBuffer, 0, nativeVertex, byteLength);
// build vertex buffer
BufferDescription bdv = new BufferDescription()
{
Usage = Usage.Default,
ByteWidth = (uint)(Marshal.SizeOf(typeof(XMeshVertex)) * triangleIndiciesList.Count),
BindingOptions = BindingOptions.VertexBuffer,
CpuAccessOptions = CpuAccessOptions.None,
MiscellaneousResourceOptions = MiscellaneousResourceOptions.None
};
SubresourceData vertexInit = new SubresourceData()
{
SystemMemory = nativeVertex
};
part.vertexBuffer = device.CreateBuffer(bdv, vertexInit);
Debug.Assert(part.vertexBuffer != null);
part.vertexCount = triangleIndiciesList.Count;
if(meshMaterials != null)
{
// only a single material is currently supported
MaterialSpecification m = meshMaterials[0];
part.material = new Material()
{
emissiveColor = m.emissiveColor,
specularColor = m.specularColor,
materialColor = m.materialColor,
specularPower = m.specularPower
};
string texturePath = "";
if(File.Exists(m.textureFileName))
texturePath = m.textureFileName;
if(File.Exists(meshDirectory + "\\" + m.textureFileName))
texturePath = meshDirectory + "\\" + m.textureFileName;
if(File.Exists(meshDirectory + "\\..\\" + m.textureFileName))
texturePath = meshDirectory + "\\..\\" + m.textureFileName;
if(texturePath.Length == 0)
{
part.material.textureResource = null;
}
else
{
part.material.textureResource =
D3D10XHelpers.CreateShaderResourceViewFromFile(
device,
texturePath);
}
}
Marshal.FreeHGlobal(nativeVertex);
}
/// <summary>
/// Loads the indexed normal vectors for a mesh
/// </summary>
/// <param name="meshNormalData"></param>
/// <returns></returns>
IndexedMeshNormals LoadMeshNormals( string meshNormalData )
{
IndexedMeshNormals indexedMeshNormals = new IndexedMeshNormals( );
Match normalCount = findArrayCount.Match( meshNormalData );
if( !normalCount.Success )
throw new System.IO.InvalidDataException( "problem reading mesh normals count" );
indexedMeshNormals.normalVectors = new List<Vector4F>( );
int normals = int.Parse(normalCount.Groups[1].Value, CultureInfo.InvariantCulture);
int dataOffset = normalCount.Index + normalCount.Length;
for( int normalIndex = 0; normalIndex < normals; normalIndex++ )
{
Match normal = findVector3F.Match( meshNormalData, dataOffset );
if( !normal.Success )
throw new System.IO.InvalidDataException( "problem reading mesh normal vector" );
else
dataOffset = normal.Index + normal.Length;
indexedMeshNormals.normalVectors.Add(
new Vector4F(
float.Parse(normal.Groups[1].Value, CultureInfo.InvariantCulture),
float.Parse(normal.Groups[2].Value, CultureInfo.InvariantCulture),
float.Parse(normal.Groups[3].Value, CultureInfo.InvariantCulture),
1.0f) );
}
Match faceNormalCount = findArrayCount.Match( meshNormalData, dataOffset );
if( !faceNormalCount.Success )
throw new System.IO.InvalidDataException( "problem reading mesh normals count" );
indexedMeshNormals.normalIndexMap = new List<Int32>();
int faceCount = int.Parse(faceNormalCount.Groups[1].Value, CultureInfo.InvariantCulture);
dataOffset = faceNormalCount.Index + faceNormalCount.Length;
for( int faceNormalIndex = 0; faceNormalIndex < faceCount; faceNormalIndex++ )
{
Match normalFace = findVertexIndex.Match( meshNormalData, dataOffset );
if( !normalFace.Success )
throw new System.IO.InvalidDataException( "problem reading mesh normal face" );
else
dataOffset = normalFace.Index + normalFace.Length;
string[ ] vertexIndexes = normalFace.Groups[ 2 ].Value.Split( new char[ ] { ',' } );
for( int n = 0; n <= vertexIndexes.Length - 3; n ++ )
{
indexedMeshNormals.normalIndexMap.Add(int.Parse(vertexIndexes[0], CultureInfo.InvariantCulture));
indexedMeshNormals.normalIndexMap.Add(int.Parse(vertexIndexes[1 + n], CultureInfo.InvariantCulture));
indexedMeshNormals.normalIndexMap.Add(int.Parse(vertexIndexes[2 + n], CultureInfo.InvariantCulture));
}
}
return indexedMeshNormals;
}
