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); }