public static float[] VertexArrayToFloatArrayPlybin8(Vertex[] vertices)
{
var output = new float[vertices.Length*8];
for (int i = 0; i < vertices.Length; i++) {
output [i * 8+0] = vertices [i].X;
output [i * 8+1] = vertices [i].Y;
output [i * 8+2] = vertices [i].Z;
output [i * 8+3] = vertices [i].Normal.X;
output [i * 8+4] = vertices [i].Normal.Y;
output [i * 8+5] = vertices [i].Normal.Z;
output [i * 8+6] = vertices [i].S;
output [i * 8+7] = vertices [i].T;
}
return output;
}
public static float[] VertexArrayToFloatArrayPlybin9(Vertex[] vertices)
{
var output = new float[vertices.Length*9];
for (int i = 0; i < vertices.Length; i++) {
output [i * 9+0] = vertices [i].X;
output [i * 9+1] = vertices [i].Y;
output [i * 9+2] = vertices [i].Z;
output [i * 9+3] = vertices [i].Normal.X;
output [i * 9+4] = vertices [i].Normal.Y;
output [i * 9+5] = vertices [i].Normal.Z;
output [i * 9+6] = vertices [i].Red;
output [i * 9+7] = vertices [i].Green;
output [i * 9+8] = vertices [i].Blue;
}
return output;
}
public static float[] VertexArrayToFloatArrayPlybin11(Vertex[] vertices)
{
var output = new float[vertices.Length*11];
for (int i = 0; i < vertices.Length; i++) {
output [i * 11+0] = vertices [i].X;
output [i * 11+1] = vertices [i].Y;
output [i * 11+2] = vertices [i].Z;
output [i * 11+3] = vertices [i].Normal.X;
output [i * 11+4] = vertices [i].Normal.Y;
output [i * 11+5] = vertices [i].Normal.Z;
output [i * 11+6] = vertices [i].S;
output [i * 11+7] = vertices [i].T;
output [i * 11+8] = vertices [i].Red;
output [i * 11+9] = vertices [i].Green;
output [i * 11+10] = vertices [i].Blue;
}
return output;
}
public void MeshDataLoaded(Vertex[] vertices, uint[] indices)
{
Vertices = vertices;
Indices = indices;
}
public MeshLoader(string filename)
{
try
{
string[] lines = File.ReadAllLines(filename);
uint vertexAmount = 0;
uint faceAmount = 0;
bool normals = false;
bool texCoords = false;
bool colors = false;
uint i = 0;
for (; i < lines.Length; i++)
{
if (lines [i].StartsWith ("element vertex ", StringComparison.Ordinal))
vertexAmount = UInt32.Parse (lines [i].Substring (15));
if (lines [i].StartsWith ("element face ", StringComparison.Ordinal))
faceAmount = UInt32.Parse (lines [i].Substring (13));
normals |= lines [i].StartsWith ("property float nx", StringComparison.Ordinal);
texCoords |= lines [i].StartsWith ("property float s", StringComparison.Ordinal);
colors |= lines [i].StartsWith ("property uchar red", StringComparison.Ordinal);
if (lines [i].StartsWith ("end_header", StringComparison.Ordinal))
break;
}
i++;
Vertex[] vertices = new Vertex[vertexAmount];
String[] numbers;
int colorStride = texCoords ? 8 : 6;
for(uint j = 0; j < vertexAmount; j++)
{
numbers = lines[i].Split(' ');
vertices [j] = new Vertex(Convert.ToSingle(numbers[0], CultureInfo.InvariantCulture), Convert.ToSingle(numbers[1], CultureInfo.InvariantCulture), Convert.ToSingle(numbers[2], CultureInfo.InvariantCulture));
if(normals)
{
vertices[j].Normal.X = Convert.ToSingle(numbers[3], CultureInfo.InvariantCulture);
vertices[j].Normal.Y = Convert.ToSingle(numbers[4], CultureInfo.InvariantCulture);
vertices[j].Normal.Z = Convert.ToSingle(numbers[5], CultureInfo.InvariantCulture);
}
if(texCoords) {
vertices[j].S = Convert.ToSingle(numbers[6], CultureInfo.InvariantCulture);
vertices[j].T = Convert.ToSingle(numbers[7], CultureInfo.InvariantCulture);
}
if(colors)
{
vertices[j].Red = Byte.Parse(numbers[colorStride])/255f;
vertices[j].Green = Byte.Parse(numbers[colorStride+1])/255f;
vertices[j].Blue = Byte.Parse(numbers[colorStride+2])/255f;
}
i++;
}
var indices = new List<uint>();
for(uint j = 0; j < faceAmount; j++)
{
numbers = lines[i].Split(' ');
if(numbers[0].Equals("3"))
{
indices.Add(UInt32.Parse(numbers[1]));
indices.Add(UInt32.Parse(numbers[2]));
indices.Add(UInt32.Parse(numbers[3]));
}
else if(numbers[0].Equals("4"))
{
indices.Add(UInt32.Parse(numbers[1]));
indices.Add(UInt32.Parse(numbers[2]));
indices.Add(UInt32.Parse(numbers[3]));
indices.Add(UInt32.Parse(numbers[1]));
indices.Add(UInt32.Parse(numbers[3]));
indices.Add(UInt32.Parse(numbers[4]));
}
i++;
}
uint[] indicesA = indices.ToArray();
if(!normals)
CalcNormals(vertices, indicesA);
MeshDataLoaded(vertices, indicesA);
}
catch(Exception e)
{
Console.Error.WriteLine ("Failed to load mesh! File: " + filename);
Console.Error.WriteLine(e.StackTrace);
throw e; //I'm not handeling this shit
}
}
public static void CalcNormals(Vertex[] vertices, uint[] indices)
{
for(int i = 0; i < indices.Length; i += 3)
{
uint i0 = indices[i];
uint i1 = indices[i + 1];
uint i2 = indices[i + 2];
var v1 = new Vector3(vertices[i1].X - vertices[i0].X, vertices[i1].Y - vertices[i0].Y, vertices[i1].Z - vertices[i0].Z);
var v2 = new Vector3(vertices[i2].X - vertices[i0].X, vertices[i2].Y - vertices[i0].Y, vertices[i2].Z - vertices[i0].Z);
Vector3 normal = Vector3.Cross(v1, v2).Normalized();
vertices[i0].Normal = vertices[i0].Normal + normal;
vertices[i1].Normal = vertices[i1].Normal + normal;
vertices[i2].Normal = vertices[i2].Normal + normal;
}
for (int i = 0; i < vertices.Length; i++)
vertices [i].Normal.Normalize ();
}
public MeshLoader(Stream file, int plybinVersion)
{
bool texCoords = plybinVersion==8 | plybinVersion==11;
bool colors = plybinVersion==9 | plybinVersion==11;
if(!texCoords & !colors) {
Console.Out.WriteLine("Mesh Loader can't make sense of plybin version {0}", plybinVersion);
}
try
{
using(var reader = new BinaryReader(file)){
UInt32 vertexAmount = reader.ReadUInt32();
UInt32 faceAmount = reader.ReadUInt32();
var vertices = new Vertex[vertexAmount];
for(uint j = 0; j < vertexAmount; j++)
{
vertices [j] = new Vertex(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
vertices [j].Normal.X = reader.ReadSingle();
vertices [j].Normal.Y = reader.ReadSingle();
vertices [j].Normal.Z = reader.ReadSingle();
if(texCoords) {
vertices[j].S = reader.ReadSingle();
vertices[j].T = reader.ReadSingle();
}
if(colors) {
vertices[j].Red = reader.ReadSingle();
vertices[j].Green = reader.ReadSingle();
vertices[j].Blue = reader.ReadSingle();
}
}
var indices = new uint[faceAmount*3];
for(uint j = 0; j < faceAmount; j++)
{
indices[j*3] = reader.ReadUInt32();
indices[j*3+1] = reader.ReadUInt32();
indices[j*3+2] = reader.ReadUInt32();
}
MeshDataLoaded(vertices, indices);
}
}
catch(Exception e)
{
Console.Error.WriteLine ("Failed to load mesh! Stream: " + file);
Console.Error.WriteLine(e.StackTrace);
throw e; //I'm not handeling this shit
}
}
