public TriangleMesh(TriangleMesh mesh) : base(Vector3.Zero, Quaternion.Identity, 1.0f, new Vector4(0, 0, 1.0f, 1.0f))
{
m_vertices = new List <Vertex>(mesh.GetVertices());
m_indices = new List <int>(mesh.GetIndices());
m_triangles = new List <Triangle>(new Triangle[m_indices.Count / 3]);
}
public void LoadFile(string filename)
{
//Create an input filestream
var stream = new StreamReader(filename);
var vertices = new List <Vector3>();
var indices = new List <int>();
var faceNormals = new List <Vector3>();
string line;
while (stream.Peek() >= 0)
{
line = stream.ReadLine();
if (line == null)
{
continue;
}
switch (line[0])
{
case 'f':
ParseFace(indices, line);
break;
case 'v':
ParseVertex(vertices, line);
break;
default:
break;
}
}
var normals = new List <Vector3>(new Vector3[vertices.Count]);
for (var i = 0; i < indices.Count; i += 3)
{
var p1 = vertices[indices[i]];
var p2 = vertices[indices[i + 1]];
var p3 = vertices[indices[i + 2]];
var u = p2 - p1;
var v = p3 - p1;
var n = Vector3.Cross(u, v);
faceNormals.Add(new Vector3(n));
}
for (var i = 0; i < indices.Count; i++)
{
var f = i / 3;
var v = indices[i];
normals[v] += faceNormals[f];
}
for (var i = 0; i < normals.Count; i++)
{
normals[i] = normals[i].Normalized();
}
List <Vertex> verts = new List <Vertex>(new Vertex[vertices.Count]);
for (var i = 0; i < verts.Count; i++)
{
verts[i] = new Vertex(new Vector3(vertices[i]), new Vector3(normals[i]));
}
//CalcVertexNormals(indices, faceNormals, normals);
m_resourceMap[filename] = new TriangleMesh(verts, indices);
}