public VertexBuffer Load(string fileName)
{
var vb = new VertexBuffer();
string[] lines = File.ReadAllLines(fileName);
var currentSection = Sections.None;
var entityType = Entities.None;
int primitiveType = 0;
int coordsCount = 0;
var coords = new List <float>();
var indexes = new List <int>();
var vertices = new List <Vector>();
int verticesCount = 0;
int indexesCount = 0;
float a10 = 0, a20 = 0, a30 = 0,
a11 = 0, a21 = 0, a31 = 0,
a12 = 0, a22 = 0, a32 = 0,
a13 = 0, a23 = 0, a33 = 0;
for (int i = 0; i < lines.Length - 1; i += 2)
{
int code = int.Parse(lines[i]);
string value = lines[i + 1].ToLowerInvariant();
if (currentSection == Sections.None)
{
if (code == 0 && value == "section")
{
int j = i + 2;
code = int.Parse(lines[j]);
value = lines[j + 1].ToLowerInvariant();
if (code == 2)
{
switch (value)
{
case "header":
currentSection = Sections.Header;
break;
case "tables":
currentSection = Sections.Tables;
break;
case "blocks":
currentSection = Sections.Blocks;
break;
case "entities":
currentSection = Sections.Entities;
break;
}
i += 2;
}
}
}
else
{
if (code == 0 && value == "endsec")
{
currentSection = Sections.None;
}
else
{
if (currentSection == Sections.Entities)
{
if (code == 0)
{
switch (value)
{
case "line":
entityType = Entities.Line;
break;
case "insert":
entityType = Entities.Insert;
break;
case "mesh":
entityType = Entities.Mesh;
break;
case "3dface":
entityType = Entities.Mesh;
break;
}
int j = i + 2;
code = int.Parse(lines[j]);
if (code == 5)
{
i += 2;
}
}
else
{
if (entityType == Entities.Mesh)
{
if (code == 10 && verticesCount > 0)
{
coords.Add(float.Parse(value, CultureInfo.InvariantCulture));
}
else if (code == 20 && verticesCount > 0)
{
coords.Add(float.Parse(value, CultureInfo.InvariantCulture));
}
else if (code == 30 && verticesCount > 0)
{
coords.Add(float.Parse(value, CultureInfo.InvariantCulture));
--verticesCount;
vertices.Add(new Vector(coords[0], coords[2], coords[1]));
coords.Clear();
}
else if (code == 92)
{
verticesCount = int.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 93)
{
indexesCount = int.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 90 && indexesCount > 0)
{
if (coordsCount == 0)
{
coordsCount = int.Parse(value, CultureInfo.InvariantCulture);
--indexesCount;
primitiveType = coordsCount;
}
else
{
indexes.Add(int.Parse(value, CultureInfo.InvariantCulture));
--indexesCount;
--coordsCount;
if (coordsCount == 0)
{
if (primitiveType == 3)
{
vb.Add(new Vertex(vertices[indexes[0]]));
vb.Add(new Vertex(vertices[indexes[1]]));
vb.Add(new Vertex(vertices[indexes[2]]));
}
else if (primitiveType == 4)
{
vb.Add(new Vertex(vertices[indexes[0]]));
vb.Add(new Vertex(vertices[indexes[1]]));
vb.Add(new Vertex(vertices[indexes[2]]));
vb.Add(new Vertex(vertices[indexes[0]]));
vb.Add(new Vertex(vertices[indexes[2]]));
vb.Add(new Vertex(vertices[indexes[3]]));
}
else
{
//TODO: ?
}
indexes.Clear();
}
}
}
}
else if (entityType == Entities.Face3D)
{
if (code == 10)
{
a10 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 20)
{
a20 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 30)
{
a30 = float.Parse(value, CultureInfo.InvariantCulture);
vb.Add(new Vertex(new Vector(a10, a20, a30)));
}
else if (code == 11)
{
a11 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 21)
{
a21 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 31)
{
a31 = float.Parse(value, CultureInfo.InvariantCulture);
vb.Add(new Vertex(new Vector(a11, a21, a31)));
}
else if (code == 12)
{
a12 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 22)
{
a22 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 32)
{
a32 = float.Parse(value, CultureInfo.InvariantCulture);
vb.Add(new Vertex(new Vector(a12, a22, a32)));
}
else if (code == 13)
{
a13 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 23)
{
a23 = float.Parse(value, CultureInfo.InvariantCulture);
}
else if (code == 33)
{
a33 = float.Parse(value, CultureInfo.InvariantCulture);
vb.Add(new Vertex(new Vector(a12, a22, a32)));
vb.Add(new Vertex(new Vector(a13, a23, a33)));
vb.Add(new Vertex(new Vector(a10, a20, a30)));
}
}
}
}
}
}
}
vb.CenterCoordsToZero();
vb.SortByDistance();
vb.CalcTrianglesNormals();
return(vb);
}
