private Vector4 VertexProgramModel(MatrixTextureUniform uniform, PositionNormalTexcoordVertex vertex, NormalTexcoordVarying varying)
{
Vector4 position = uniform.matrix * vertex.position;
//varying.normal = vertex.normal;
varying.texcoord = vertex.texcoord;
return(position);
}
public static PositionNormalTexcoordVertex[] Load(string filename)
{
List <float> vertices = new List <float>();
List <float> normals = new List <float>();
List <float> texcoords = new List <float>();
List <int> faces = new List <int>();
// indexing starts with 1 in obj files, therefore we add an empty entry
vertices.Add(0.0f);
vertices.Add(0.0f);
vertices.Add(0.0f);
normals.Add(0.0f);
normals.Add(0.0f);
normals.Add(0.0f);
texcoords.Add(0.0f);
texcoords.Add(0.0f);
StreamReader sr = new StreamReader(filename);
while (!sr.EndOfStream)
{
string s = sr.ReadLine();
if (s.StartsWith("#"))
{
continue;
}
string[] parts = s.Split(' ');
if (parts[0] == "v")
{
for (int i = 1; i <= 3; i++)
{
vertices.Add(float.Parse(parts[i]));
}
}
else if (parts[0] == "vn")
{
for (int i = 1; i <= 3; i++)
{
normals.Add(float.Parse(parts[i]));
}
}
else if (parts[0] == "vt")
{
for (int i = 1; i <= 2; i++)
{
texcoords.Add(float.Parse(parts[i]));
}
}
else if (parts[0] == "f")
{
for (int i = 1; i <= 3; i++)
{
string[] subparts = (parts[i] + "/0/0").Split('/');
faces.Add(int.Parse(subparts[0]));
faces.Add(int.Parse(subparts[2]));
faces.Add(int.Parse(subparts[1]));
}
}
}
sr.Close();
int count = faces.Count / 3;
PositionNormalTexcoordVertex[] result = new PositionNormalTexcoordVertex[count];
for (int i = 0; i < count; i++)
{
int p = faces[i * 3 + 0] * 3;
int n = faces[i * 3 + 1] * 3;
int t = faces[i * 3 + 2] * 2;
Vector4 position = new Vector4();
position.X = vertices[p + 0];
position.Y = vertices[p + 1];
position.Z = vertices[p + 2];
position.W = 1.0f;
Vector3 normal = new Vector3();
normal.X = normals[n + 0];
normal.Y = normals[n + 1];
normal.Z = normals[n + 2];
Vector2 texcoord = new Vector2();
texcoord.X = texcoords[t + 0];
texcoord.Y = texcoords[t + 1];
result[i] = new PositionNormalTexcoordVertex(position, normal, texcoord);
}
return(result);
}
