public VertexBufferObject(Mesh[] meshes)
{
List<Vertex> vertices = new List<Vertex>();
List<int> indices = new List<int>();
foreach (Mesh m in meshes)
{
foreach (Face f in m.Faces)
{
for (int i = 0; i < f.vIndices.Length; i++)
{
Vertex v = new Vertex();
v.Position = m.Vertices[(int)f.vIndices[i]];
v.Normal = m.Normals[(int)f.nIndices[i]];
v.TextureCoordinate = m.TexCoords[(int)f.tIndices[i]];
vertices.Add(v);
indices.Add(vertices.Count - 1);
}
}
}
ids = new int[2];
GL.GenBuffers(2, ids);
GL.BindBuffer(BufferTarget.ArrayBuffer,ids[0]);
GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(Vertex.SizeInBytes*vertices.Count), vertices.ToArray(), BufferUsageHint.StaticDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ids[1]);
GL.BufferData(BufferTarget.ElementArrayBuffer, new IntPtr(sizeof(int) * indices.Count), indices.ToArray(), BufferUsageHint.StaticDraw);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
elemets = indices.Count / 3;
}
public VertexBufferObject(Mesh mesh)
: this(new Mesh[] { mesh })
{
}
public static Mesh[] loadModelfromOBJ(string path)
{
if (!File.Exists(path))
return null;
System.IO.StreamReader sr = new StreamReader(path);
List<Mesh> meshes = new List<Mesh>();
List<Vector3> vertices = new List<Vector3>();
List<Vector3> normals = new List<Vector3>();
List<Vector2> texCoords = new List<Vector2>();
//List<Face> faces = new List<Face>();
while (!sr.EndOfStream)
{
string[] s = sr.ReadLine().Split(' ');
Mesh m = null;
if (meshes.Count > 0)
m = meshes[meshes.Count - 1];
switch (s[0])
{
case "o":
if(meshes.Count > 0){
m.Vertices.AddRange(vertices);
m.Normals.AddRange(normals);
m.TexCoords.AddRange(texCoords);
}
meshes.Add(new Mesh());
meshes[meshes.Count - 1].Name = s[1];
break;
case "g":
m = new Mesh();
m.Name = s[1];
meshes.Add(m);
break;
case "v":
vertices.Add(new Vector3(Single.Parse(s[1], CultureInfo.InvariantCulture), Single.Parse(s[2], CultureInfo.InvariantCulture), Single.Parse(s[3], CultureInfo.InvariantCulture)));
break;
case "vn":
normals.Add(new Vector3(Single.Parse(s[1], CultureInfo.InvariantCulture), Single.Parse(s[2], CultureInfo.InvariantCulture), Single.Parse(s[3], CultureInfo.InvariantCulture)));
break;
case "vt":
texCoords.Add(new Vector2(Single.Parse(s[1], CultureInfo.InvariantCulture), Single.Parse(s[2], CultureInfo.InvariantCulture)));
break;
case "f":
uint[] vI = new uint[] { UInt32.Parse(s[1].Split('/')[0], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[2].Split('/')[0], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[3].Split('/')[0], CultureInfo.InvariantCulture) - 1 };
uint[] nI = new uint[] { 0, 0, 0 };
uint[] tI = new uint[] { 0, 0, 0 };
if (texCoords.Count > 0)
{
tI = new uint[] { UInt32.Parse(s[1].Split('/')[1], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[2].Split('/')[1], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[3].Split('/')[1], CultureInfo.InvariantCulture) - 1 };
if (normals.Count > 0)
{
nI = new uint[] { UInt32.Parse(s[1].Split('/')[2], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[2].Split('/')[2], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[3].Split('/')[2], CultureInfo.InvariantCulture) - 1 };
}
}
else if (normals.Count > 0)
{
nI = new uint[] { UInt32.Parse(s[1].Split('/')[1], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[2].Split('/')[1], CultureInfo.InvariantCulture) - 1, UInt32.Parse(s[3].Split('/')[1], CultureInfo.InvariantCulture) - 1 };
}
m.Faces.Add(new Face(vI, nI, tI));
break;
default:
break;
}
}
if (meshes.Count > 0)
{
meshes[meshes.Count - 1].Vertices.AddRange(vertices);
meshes[meshes.Count - 1].Normals.AddRange(normals);
meshes[meshes.Count - 1].TexCoords.AddRange(texCoords);
}
return meshes.ToArray();
}
