public void ImportWavefrontObject(WavefrontObject Wavefront, CompressionBounds boundingBox)
{
List<D3DVertex> temp = new List<D3DVertex>(Wavefront.FaceCount * 3);
for (int Material = 0; Material < Wavefront.MaterialCount; Material++)
{
int[] FaceIndices = Wavefront.GetFaceIndicesUsingMaterialID(Material);
for (int Face = 0; Face < FaceIndices.Length; Face++)
{
for (int Component = 0; Component < 3; Component++)
{
D3DVertex d3DVertex = new D3DVertex();
d3DVertex.Position = Wavefront.Vertices[Wavefront.Faces[FaceIndices[Face]].VertexIndices[Component]];
d3DVertex.Texture = Wavefront.Texcoords[Wavefront.Faces[FaceIndices[Face]].TexcoordIndices[Component]];
d3DVertex.Normal = Wavefront.Normals[Wavefront.Faces[FaceIndices[Face]].NormalIndices[Component]];
temp.Add(d3DVertex);
}
}
}
//Hashtable D3DVertexHashtable = new Hashtable(Wavefront.FaceCount * 3);
List<short> tempIndices = new List<short>(Wavefront.FaceCount * 3);
List<D3DVertex> D3DVertexList = new List<D3DVertex>(Wavefront.FaceCount * 3);
short IndiceIndex = 0;
for (int Index = 0; Index < temp.Count; Index++)
{
D3DVertex d3DVertex = temp[Index];
if (!D3DVertexList.Contains(d3DVertex))
{
//D3DVertexHashtable.Add(d3DVertex, d3DVertex);
D3DVertexList.Add(d3DVertex);
tempIndices.Add(IndiceIndex);
IndiceIndex++;
}
else
{
tempIndices.Add((short)D3DVertexList.IndexOf(d3DVertex));
}
}
this.Indices = tempIndices.ToArray();
D3DVertex[] D3DVertices = D3DVertexList.ToArray();
RenderDevice Device = new RenderDevice();
Device.InitializeDevice();
Microsoft.DirectX.Direct3D.Mesh mesh = new Microsoft.DirectX.Direct3D.Mesh(Wavefront.FaceCount, D3DVertices.Length, MeshFlags.SystemMemory, D3DVertex.Format, Device.Device);
List<int> newAttributes = new List<int>(Wavefront.FaceCount);
foreach (Face f in Wavefront.Faces)
{
newAttributes.Add(f.MaterialID);
}
mesh.LockAttributeBuffer(LockFlags.None);
mesh.UnlockAttributeBuffer(newAttributes.ToArray());
mesh.SetIndexBufferData(Indices.ToArray(), LockFlags.None);
mesh.SetVertexBufferData(D3DVertices.ToArray(), LockFlags.None);
int[] adj = new int[Wavefront.FaceCount * 3];
mesh.GenerateAdjacency(0.005F, adj);
mesh.OptimizeInPlace(MeshFlags.OptimizeAttributeSort, adj);
IndexBuffer iBuffer = mesh.IndexBuffer;
short[] D3DIndices;
int IndiceCount;
short[][] MaterialFaceIndices = new short[Wavefront.MaterialCount][];
for (int Material = 0; Material < Wavefront.MaterialCount; Material++)
{
iBuffer = Microsoft.DirectX.Direct3D.Mesh.ConvertMeshSubsetToSingleStrip(mesh, Material, MeshFlags.SystemMemory, out IndiceCount);
GraphicsStream graphics = iBuffer.Lock(0, 0, LockFlags.None);
unsafe
{
short* IndiceArray = (short*)graphics.InternalData.ToPointer();
D3DIndices = new short[IndiceCount];
for (int Index = 0; Index < IndiceCount; Index++)
{
D3DIndices[Index] = IndiceArray[Index];
}
}
MaterialFaceIndices[Material] = D3DIndices;
}
List<short> newIndices = new List<short>();
Groups = new Group[MaterialFaceIndices.Length];
for (int i = 0; i < MaterialFaceIndices.Length; i++)
{
Groups[i] = new Group();
Groups[i].IndiceStart = (short)newIndices.Count;
Groups[i].IndiceCount = (short)MaterialFaceIndices[i].Length;
Groups[i].ShaderIndex = (short)i;
newIndices.AddRange(MaterialFaceIndices[i]);
}
this.Indices = newIndices.ToArray();
this._Vertices = new Vector3[D3DVertices.Length];
this.Texcoords = new Vector2[D3DVertices.Length];
this.Normals = new Vector3[D3DVertices.Length];
for (int i = 0; i < D3DVertices.Length; i++)
{
_Vertices[i] = D3DVertices[i].Position;
Texcoords[i] = D3DVertices[i].Texture;
Normals[i] = D3DVertices[i].Normal;
}
CalculateTangentArray(_Vertices.Length, _Vertices, Normals, Texcoords, mesh.NumberFaces, Wavefront.Faces.ToArray(), out Bitangents, out Tangents);
mesh.Dispose();
}
public static void CreateWavefrontOBJFile(WavefrontObject wavefront, string filename)
{
FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.Read);
StreamWriter sw = new StreamWriter(fs);
sw.NewLine = "\r\n";
if (wavefront.VertexCount > 0)
foreach (Vector3 v in wavefront.Vertices)
{
sw.WriteLine("v " + Math.Round((double)v.X, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)v.Y, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)v.Z, 5, MidpointRounding.ToEven).ToString());
}
sw.WriteLine("# " + wavefront.VertexCount.ToString() + " Vertices");
sw.WriteLine();
if (wavefront.TexcoordCount > 0)
foreach (Vector2 vt in wavefront.Texcoords)
{
sw.WriteLine("vt " + Math.Round((double)vt.X, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)vt.Y, 5, MidpointRounding.ToEven).ToString());
}
sw.WriteLine("# " + wavefront.TexcoordCount.ToString() + " Texcoords");
sw.WriteLine();
if (wavefront.NormalCount > 0)
foreach (Vector3 vn in wavefront.Normals)
{
sw.WriteLine("vn " + Math.Round((double)vn.X, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)vn.Y, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)vn.Z, 5, MidpointRounding.ToEven).ToString());
}
sw.WriteLine("# " + wavefront.NormalCount.ToString() + " Normals");
sw.WriteLine();
if (wavefront.FaceCount > 0)
{
Dictionary<int, string> MaterialNames;
MaterialNames = wavefront.Materials.ToDictionary(x => x.Value, x => x.Key);
int[] Faces;
string curMat = "";
string newMat;
Face temp;
for (int Group = 0; Group < wavefront.GroupCount; Group++)
{
Faces = wavefront.GetFaceIndicesUsingGroupID(Group);
for (int Face = 0; Face < Faces.Length; Face++)
{
temp = wavefront.Faces[Faces[Face]];
newMat = MaterialNames[temp.MaterialID];
if (curMat != newMat)
{
curMat = newMat;
sw.WriteLine("usemtl " + curMat);
}
sw.WriteLine("f " + temp.ToString());
}
sw.WriteLine("# " + Faces.Length.ToString() + " Faces");
sw.WriteLine();
curMat = "";
}
}
sw.Dispose();
fs.Dispose();
}
public void ExportWavefrontObject(Shader[] shaders)
{
WavefrontObject wfo = new WavefrontObject();
wfo.Vertices = new List<Vector3>( _Vertices);
wfo.VertexCount = _Vertices.Length;
wfo.Texcoords = new List<Vector2>(Texcoords);
wfo.TexcoordCount = Texcoords.Length;
wfo.Normals = new List<Vector3>(Normals);
wfo.NormalCount = Normals.Length;
wfo.Materials = new Dictionary<string, int>();
for (int i = 0; i < shaders.Length; i++)
wfo.Materials.Add("Default_" + i.ToString(), i);
wfo.GroupCount = Groups.Length;
List<Face> FaceArray = new List<Face>(Indices.Length);
for (int i = 0; i < Groups.Length; i++)
{
int Start = Groups[i].IndiceStart;
int End = Groups[i].IndiceStart + Groups[i].IndiceCount - 2;
bool Winding = true;
for (int x = Start; x < End; x++)
{
Face Temp = new Face(
Indices[x],
Indices[x + 1],
Indices[x + 2],
Indices[x],
Indices[x + 1],
Indices[x + 2],
Indices[x],
Indices[x + 1],
Indices[x + 2]
);
Temp.MaterialID = Groups[i].ShaderIndex;
Temp.GroupID = i;
if (!Temp.IsDegenerate)
{
FaceArray.Add(Temp);
if (Winding == false)
{
short y = Temp.VertexIndices[1];
short z = Temp.VertexIndices[2];
Temp.VertexIndices[1] = z;
Temp.VertexIndices[2] = y;
y = Temp.TexcoordIndices[1];
z = Temp.TexcoordIndices[2];
Temp.TexcoordIndices[1] = z;
Temp.TexcoordIndices[2] = y;
y = Temp.NormalIndices[1];
z = Temp.NormalIndices[2];
Temp.NormalIndices[1] = z;
Temp.NormalIndices[2] = y;
Winding = true;
}
else
{
Winding = false;
}
}
else
{
if (Winding == false) { Winding = true; }
else { Winding = false; }
}
}
}
FaceArray.TrimExcess();
wfo.Faces = FaceArray;
wfo.FaceCount = FaceArray.Count;
Wavefront.CreateWavefrontOBJFile(wfo, "O:\\test.obj");
}
public static WavefrontObject ParseWavefrontOBJFile(string filename)
{
StreamReader sr = new StreamReader(File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite));
string s = sr.ReadToEnd();
sr.Close();
string[] Lines = s.Split(new string[] { "\r\n", "\n\r", "\n", "\r" }, StringSplitOptions.RemoveEmptyEntries);
s = "";
WavefrontObject Wavefront = new WavefrontObject();
int Material = -1;
int Group = -1;
string Line;
string[] components;
string t;
string last;
int Length;
bool Scan = true;
for (int Pass = 0; Pass < 2; Pass++)
{
for (int i = 0; i < Lines.Length; i++)
{
Line = Lines[i].Trim();
Length = Line.IndexOf(" ");
if (Length > 0)
Line = Line.Substring(0, Length);
last = s;
switch (Line)
{
case "v":
t = Lines[i].Trim();
components = t.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (Scan)
Wavefront.VertexCount++;
else
{
float x = float.Parse(components[1]);
float y = float.Parse(components[2]);
float z = float.Parse(components[3]);
Wavefront.Vertices.Add(new Vector3(x, y, z));
}
break;
case "vt":
t = Lines[i].Trim();
components = t.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (Scan)
Wavefront.TexcoordCount++;
else
{
float u = float.Parse(components[1]);
float v = float.Parse(components[2]);
Wavefront.Texcoords.Add(new Vector2(u, v));
}
break;
case "vn":
t = Lines[i].Trim();
components = t.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (Scan)
Wavefront.NormalCount++;
else
{
float x = float.Parse(components[1]);
float y = float.Parse(components[2]);
float z = float.Parse(components[3]);
Wavefront.Normals.Add(new Vector3(x, y, z));
}
break;
case "f":
t = Lines[i].Trim();
components = t.Split(new string[] { " ", "/" }, StringSplitOptions.RemoveEmptyEntries);
if (Scan)
Wavefront.FaceCount++;
else
{
Face temp = new Face(components);
temp.MaterialID = Material;
temp.GroupID = Group;
Wavefront.Faces.Add(temp);
}
break;
case "l":
t = Lines[i].Trim();
if (Scan)
Wavefront.LineCount++;
else
{
Line temp = new Line(t);
Wavefront.Lines.Add(temp);
}
break;
case "g":
t = Lines[i].Trim();
components = t.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (Scan)
Wavefront.GroupCount++;
else
{
if (!(components.Length == 1) && !Wavefront.Groups.ContainsKey(components[1]))
{
Wavefront.Groups.Add(components[1], Wavefront.Groups.Count);
Group = Wavefront.Groups[components[1]];
}
else if (!(components.Length == 1))
Group = Wavefront.Groups[components[1]];
}
break;
case "usemtl":
t = Lines[i].Trim();
components = t.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (Scan)
Wavefront.MaterialCount++;
else
{
if (!Wavefront.Materials.ContainsKey(components[1]))
Wavefront.Materials.Add(components[1], Wavefront.Materials.Count);
Material = Wavefront.Materials[components[1]];
}
break;
default:
break;
}
}
if (Scan)
{
Wavefront.Initialize();
Scan = false;
}
}
return Wavefront;
}
