public static Vector Cross(Vector v1, Vector v2) {
Vector result = new Vector();
result.X = (v1.Y * v2.Z) - (v1.Z * v2.Y);
result.Y = (v1.Z * v2.X) - (v1.X * v2.Z);
result.Z = (v1.X * v2.Y) - (v1.Y * v2.X);
return result;
}
public static Vector Normalize(Vector v1) {
Vector result = new Vector(v1.X, v1.Y, v1.Z, v1.W);
float length = result.X * result.X + result.Y * result.Y + result.Z * result.Z;
length = (float)Math.Sqrt(length);
result.X /= length; result.Y /= length; result.Z /= length;
return result;
}
public static Mesh Load(string path) {
Mesh mesh = new Mesh();
mesh.Name = System.IO.Path.GetFileNameWithoutExtension(path);
Vector[] vertices = new Vector[0];
Color[] colors = new Color[0];
uint[] triangles = new uint[0];
uint v = 0; //The Vertices index
uint c = 0; //The Colors index
uint t = 0; //The Triangles index
uint j = 0; //The current index to offset triangles by
string[] lines = System.IO.File.ReadAllLines(path);
int vertCount = 0;
int triCount = 0;
foreach (string line in lines) {
if (line.StartsWith("v")) {
vertCount++;
}
if (line.StartsWith("t")) {
triCount += 3;
}
}
vertices = new Vector[vertCount];
colors = new Color[vertCount];
triangles = new uint[triCount];
for (int i = 0; i < lines.Length; i++) {
string line = lines[i];
if (line == "") continue;
string[] bits = line.Split(" ".ToCharArray());
if (bits[0] == "v") {
vertices[v] = new Vector(float.Parse(bits[1]), float.Parse(bits[2]), float.Parse(bits[3]));
v++;
} else if (bits[0] == "c") {
colors[c] = new Color(byte.Parse(bits[1]), byte.Parse(bits[2]), byte.Parse(bits[3]), ((bits.Length > 4) ? byte.Parse(bits[4]) : (byte)255));
c++;
} else if (bits[0] == "t") {
triangles[t + 0] = uint.Parse(bits[1]) + j;
triangles[t + 1] = uint.Parse(bits[2]) + j;
triangles[t + 2] = uint.Parse(bits[3]) + j;
t += 3;
} else if (bits[0] == "#") {
j = v;
}
}
mesh.Vertices = vertices;
mesh.Colors = colors;
mesh.Triangles = triangles;
mesh.CalculateNormals();
return mesh;
}