public Triangle(Vertex v0, Vertex v1, Vertex v2, string material)
: base(material)
{
Vertex0 = v0;
Vertex1 = v1;
Vertex2 = v2;
E1 = Vertex1.Position - Vertex0.Position;
E2 = Vertex2.Position - Vertex0.Position;
Normal = Vector3.CrossProduct(E2, E1).Normalized;
}
public Quad(Vertex v0, Vertex v1, Vertex v2, Vertex v3, string material)
: base(material)
{
Vertex0 = v0;
Vertex1 = v1;
Vertex2 = v2;
Vertex3 = v3;
T1 = new Triangle(Vertex0, Vertex1, Vertex3, material);
T2 = new Triangle(Vertex2, Vertex3, Vertex1, material);
}
private static IEnumerable<Triangle> ParseObjFile(string[] content, string mat)
{
List<Vector3> vertices = new List<Vector3>();
List<Vector3> normals = new List<Vector3>();
List<Triangle> tris = new List<Triangle>();
foreach(string line in content)
{
if (line.StartsWith("#"))
continue;
string[] tokens = line.Split(' ');
if (tokens.Length == 0)
continue;
switch(tokens[0])
{
case "v":
vertices.Add(new Vector3(double.Parse(tokens[1]), double.Parse(tokens[2]), double.Parse(tokens[3])));
break;
case "vn":
normals.Add(new Vector3(double.Parse(tokens[1]), double.Parse(tokens[2]), double.Parse(tokens[3])));
break;
case "f":
string[] verts = tokens[1].Split('/');
Vertex v0 = new Vertex { Position = vertices[int.Parse(verts[0]) - 1] };
verts = tokens[2].Split('/');
Vertex v1 = new Vertex { Position = vertices[int.Parse(verts[0]) - 1] };
verts = tokens[3].Split('/');
Vertex v2 = new Vertex { Position = vertices[int.Parse(verts[0]) - 1] };
tris.Add(new Triangle(v0,v1,v2, mat));
break;
}
}
return tris;
}
