Esempio n. 1
0
        /// <summary>
        ///
        /// </summary>
        /// <param name="inputFile"></param>
        /// <param name="encoding">default utf-8</param>
        /// <returns></returns>
        public static ObjModel Parse(string inputFile, Encoding encoding = null)
        {
            encoding = encoding ?? TextParser.DefaultEncoding;
            // https://stackoverflow.com/questions/2161895/reading-large-text-files-with-streams-in-c-sharp
            using (var fs = new FileStream(inputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
                using (var bs = new BufferedStream(fs))
                    using (var sr = new StreamReader(bs, encoding))
                    {
                        var nameBuilder   = new StringBuilder();
                        var model         = new ObjModel();
                        var groupBuilder  = model.GetMapBuilder("default");
                        var objectBuilder = model.GetMapBuilder("default");
                        var meshBuilder   = model.GetMapBuilder("");
                        TextParser.Lex(sr, (key, args) =>
                        {
                            switch (key)
                            {
                            case "mtllib":
                                model.MaterialLibaries.AddRange(args);
                                break;

                            case "v":
                                args = TextParser.ParseArgs(args);
                                model.Positions.Add(ParsePoint(args));
                                break;

                            case "vt":
                                args = TextParser.ParseArgs(args);
                                model.TextureCoords.Add(ParseUv(args));
                                break;

                            case "vn":
                                args = TextParser.ParseArgs(args);
                                model.Normals.Add(ParseNormal(args));
                                break;

                            case "vp":
                                break;

                            case "p":
                                args = TextParser.ParseArgs(args);
                                foreach (var a in args)
                                {
                                    var index = FindIndex(model.Positions, a);
                                    model.Points.Add(index);
                                }
                                break;

                            case "l":
                                args = TextParser.ParseArgs(args);
                                FillLineSegments(model, args);
                                break;

                            case "fo":
                            case "f":
                                args = TextParser.ParseArgs(args);
                                FillPolygon(model, args);
                                break;

                            case "g":
                                args = TextParser.ParseArgs(args);
                                groupBuilder.Start(args[0]);
                                break;

                            case "o":
                                args = TextParser.ParseArgs(args);
                                objectBuilder.Start(args[0]);
                                if (String.IsNullOrEmpty(model.Name))
                                {
                                    model.Name = args[0];
                                }
                                break;

                            case "usemtl":
                                meshBuilder.Start(args[0]);
                                break;
                            }
                        });
                        objectBuilder.End();
                        groupBuilder.End();
                        meshBuilder.End();
                        model.Objects = objectBuilder.Result;
                        model.Groups  = groupBuilder.Result;
                        model.Meshes  = meshBuilder.Result;

                        return(model);
                    }
        }
Esempio n. 2
0
        /// <summary>
        ///
        /// </summary>
        /// <param name="inputFile"></param>
        /// <param name="encoding">default utf-8</param>
        /// <returns></returns>
        public static MtlModel Parse(string inputFile, Encoding encoding = null)
        {
            encoding = encoding ?? TextParser.DefaultEncoding;

            using (var fs = new FileStream(inputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
                using (var bs = new BufferedStream(fs))
                    using (var sr = new StreamReader(bs, encoding))
                    {
                        var    model = new MtlModel();
                        string name  = null;
                        var    mat   = new Material();

                        TextParser.Lex(sr, (key, args) =>
                        {
                            switch (key)
                            {
                            case "newmtl":
                                if (!String.IsNullOrEmpty(name))
                                {
                                    model.Materials.Add(name, mat);
                                    mat = new Material();
                                }
                                name = args[0];
                                break;

                            case "Ka":
                                mat.Ambient = ParseColor(args);
                                break;

                            case "Kd":
                                mat.Diffuse = ParseColor(args);
                                break;

                            case "Ks":
                                mat.Specular = ParseColor(args);
                                break;

                            case "Ke":
                                mat.Emissive = ParseColor(args);
                                break;

                            case "Tf":
                                mat.TransmissionFilter = ParseColor(args);
                                break;

                            case "Ns":
                                if (float.TryParse(args[0], out var ns))
                                {
                                    mat.SpecularExponent = ns;
                                }
                                break;

                            case "Ni":
                                if (float.TryParse(args[0], out var ni))
                                {
                                    mat.OpticalDensity = ni;
                                }
                                break;

                            case "illum":
                                if (uint.TryParse(args[0], out var illum))
                                {
                                    mat.Illumination = illum;
                                }
                                break;

                            case "d":
                                if (float.TryParse(args[0], out var d))
                                {
                                    mat.Dissolve = d;
                                }
                                break;

                            case "map_Ka":
                                mat.AmbientMap = ParseMap(args);
                                break;

                            case "map_Kd":
                                mat.DiffuseMap = ParseMap(args);
                                break;

                            case "map_Ks":
                                mat.SpecularMap = ParseMap(args);
                                break;

                            case "map_Ke":
                                mat.EmissiveMap = ParseMap(args);
                                break;

                            case "bump":
                            case "map_bump":
                            case "map_Bump":
                                mat.BumpMap = ParseMap(args);
                                break;
                            }
                        });

                        if (!String.IsNullOrEmpty(name))
                        {
                            model.Materials.Add(name, mat);
                        }
                        return(model);
                    }
        }