Exemple #1
0
        private static void WritePolyfaceMesh()
        {
            DxfDocument dxf = new DxfDocument();

            List<PolyfaceMeshVertex> vertexes = new List<PolyfaceMeshVertex>
                                                    {
                                                        new PolyfaceMeshVertex(0, 0, 0),
                                                        new PolyfaceMeshVertex(10, 0, 0),
                                                        new PolyfaceMeshVertex(10, 10, 0),
                                                        new PolyfaceMeshVertex(5, 15, 0),
                                                        new PolyfaceMeshVertex(0, 10, 0)
                                                    };
            List<PolyfaceMeshFace> faces = new List<PolyfaceMeshFace>
                                               {
                                                   new PolyfaceMeshFace(new[] {1, 2, -3}),
                                                   new PolyfaceMeshFace(new[] {-1, 3, -4}),
                                                   new PolyfaceMeshFace(new[] {-1, 4, 5})
                                               };

            PolyfaceMesh mesh = new PolyfaceMesh(vertexes, faces);
            dxf.AddEntity(mesh);

            dxf.Save("mesh.dxf", DxfVersion.AutoCad2000);
        }
Exemple #2
0
        private IPolyline ReadPolyline(ref CodeValuePair code)
        {
            string handle = string.Empty;
            Layer layer = Layer.Default;
            AciColor color = AciColor.ByLayer;
            LineType lineType = LineType.ByLayer;
            PolylineTypeFlags flags = PolylineTypeFlags.OpenPolyline;
            float elevation = 0.0f;
            float thickness = 0.0f;
            Vector3f normal = Vector3f.UnitZ;
            List<Vertex> vertexes = new List<Vertex>();
            Dictionary<ApplicationRegistry, XData> xData = new Dictionary<ApplicationRegistry, XData>();
            //int numVertexes = -1;
            //int numFaces = -1;

            code = this.ReadCodePair();

            while (code.Code != 0)
            {
                switch (code.Code)
                {
                    case 5:
                        handle = code.Value;
                        code = this.ReadCodePair();
                        break;
                    case 8:
                        layer = this.GetLayer(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 62:
                        color = new AciColor(short.Parse(code.Value));
                        code = this.ReadCodePair();
                        break;
                    case 6:
                        lineType = this.GetLineType(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 30:
                        elevation = float.Parse(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 39:
                        thickness = float.Parse(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 70:
                        flags = (PolylineTypeFlags) (int.Parse(code.Value));
                        code = this.ReadCodePair();
                        break;
                    case 71:
                        //this field might not exist for polyface meshes, we cannot depend on it
                        //numVertexes = int.Parse(code.Value); code = this.ReadCodePair();
                        code = this.ReadCodePair();
                        break;
                    case 72:
                        //this field might not exist for polyface meshes, we cannot depend on it
                        //numFaces  = int.Parse(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 210:
                        normal.X = float.Parse(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 220:
                        normal.Y = float.Parse(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 230:
                        normal.Z = float.Parse(code.Value);
                        code = this.ReadCodePair();
                        break;
                    case 1001:
                        XData xDataItem = this.ReadXDataRecord(code.Value, ref code);
                        xData.Add(xDataItem.ApplicationRegistry, xDataItem);
                        break;
                    default:
                        if (code.Code >= 1000 && code.Code <= 1071)
                            throw new DxfInvalidCodeValueEntityException(code.Code, code.Value, this.file,
                                                                         "The extended data of an entity must start with the application registry code " + this.fileLine);

                        code = this.ReadCodePair();
                        break;
                }
            }

            //begin to read the vertex list
            if (code.Value != DxfObjectCode.Vertex)
                throw new DxfEntityException(DxfObjectCode.Polyline, this.file, "Vertex not found in line " + this.fileLine);
            while (code.Value != StringCode.EndSequence)
            {
                if (code.Value == DxfObjectCode.Vertex)
                {
                    Debug.Assert(code.Code == 0);
                    Vertex vertex = this.ReadVertex(ref code);
                    vertexes.Add(vertex);
                }
            }

            // read the end end sequence object until a new element is found
            if (code.Value != StringCode.EndSequence)
                throw new DxfEntityException(DxfObjectCode.Polyline, this.file, "End sequence entity not found in line " + this.fileLine);
            code = this.ReadCodePair();
            string endSequenceHandle = string.Empty;
            Layer endSequenceLayer = layer;
            while (code.Code != 0)
            {
                switch (code.Code)
                {
                    case 5:
                        endSequenceHandle = code.Value;
                        code = this.ReadCodePair();
                        break;
                    case 8:
                        endSequenceLayer = this.GetLayer(code.Value);
                        code = this.ReadCodePair();
                        break;
                    default:
                        code = this.ReadCodePair();
                        break;
                }
            }

            IPolyline pol;
            bool isClosed = false;

            if ((flags & PolylineTypeFlags.ClosedPolylineOrClosedPolygonMeshInM) == PolylineTypeFlags.ClosedPolylineOrClosedPolygonMeshInM)
            {
                isClosed = true;
            }

            //to avoid possible error between the vertex type and the polyline type
            //the polyline type will decide which information to use from the read vertex
            if ((flags & PolylineTypeFlags.Polyline3D) == PolylineTypeFlags.Polyline3D)
            {
                List<Polyline3dVertex> polyline3dVertexes = new List<Polyline3dVertex>();
                foreach (Vertex v in vertexes)
                {
                    Polyline3dVertex vertex = new Polyline3dVertex
                                                  {
                                                      Color = v.Color,
                                                      Layer = v.Layer,
                                                      LineType = v.LineType,
                                                      Location = v.Location,
                                                      Handle = v.Handle
                                                  };
                    vertex.XData = v.XData;
                    polyline3dVertexes.Add(vertex);
                }

                ////posible error avoidance, the polyline is marked as polyline3d code:(70,8) but the vertex is marked as PolylineVertex code:(70,0)
                //if (v.Type == EntityType.PolylineVertex)
                //{
                //    Polyline3dVertex polyline3dVertex = new Polyline3dVertex(((PolylineVertex)v).Location.X, ((PolylineVertex)v).Location.Y,0);
                //    polyline3dVertexes.Add(polyline3dVertex);
                //}
                //else
                //{
                //    polyline3dVertexes.Add((Polyline3dVertex)v);
                //}
                //}
                pol = new Polyline3d(polyline3dVertexes, isClosed)
                          {
                              Handle = handle
                          };
                ((Polyline3d) pol).EndSequence.Handle = endSequenceHandle;
                ((Polyline3d) pol).EndSequence.Layer = endSequenceLayer;
            }
            else if ((flags & PolylineTypeFlags.PolyfaceMesh) == PolylineTypeFlags.PolyfaceMesh)
            {
                //the vertex list created contains vertex and face information
                List<PolyfaceMeshVertex> polyfaceVertexes = new List<PolyfaceMeshVertex>();
                List<PolyfaceMeshFace> polyfaceFaces = new List<PolyfaceMeshFace>();
                foreach (Vertex v in vertexes)
                {
                    if ((v.Flags & (VertexTypeFlags.PolyfaceMeshVertex | VertexTypeFlags.Polygon3dMesh)) == (VertexTypeFlags.PolyfaceMeshVertex | VertexTypeFlags.Polygon3dMesh))
                    {
                        PolyfaceMeshVertex vertex = new PolyfaceMeshVertex
                                                        {
                                                            Color = v.Color,
                                                            Layer = v.Layer,
                                                            LineType = v.LineType,
                                                            Location = v.Location,
                                                            Handle = v.Handle
                                                        };
                        vertex.XData = xData;
                        polyfaceVertexes.Add(vertex);
                    }
                    else if ((v.Flags & (VertexTypeFlags.PolyfaceMeshVertex)) == (VertexTypeFlags.PolyfaceMeshVertex))
                    {
                        PolyfaceMeshFace vertex = new PolyfaceMeshFace
                                                      {
                                                          Color = v.Color,
                                                          Layer = v.Layer,
                                                          LineType = v.LineType,
                                                          VertexIndexes = v.VertexIndexes,
                                                          Handle = v.Handle
                                                      };
                        vertex.XData = xData;
                        polyfaceFaces.Add(vertex);
                    }

                    //if (v.Type == EntityType.PolyfaceMeshVertex)
                    //{
                    //    polyfaceVertexes.Add((PolyfaceMeshVertex) v);
                    //}
                    //else if (v.Type == EntityType.PolyfaceMeshFace)
                    //{
                    //    polyfaceFaces.Add((PolyfaceMeshFace) v);
                    //}
                    //else
                    //{
                    //    throw new EntityDxfException(v.Type.ToString(), this.file, "Error in vertex type.");
                    //}
                }
                pol = new PolyfaceMesh(polyfaceVertexes, polyfaceFaces)
                          {
                              Handle = handle
                          };
                ((PolyfaceMesh) pol).EndSequence.Handle = endSequenceHandle;
                ((PolyfaceMesh) pol).EndSequence.Layer = endSequenceLayer;
            }
            else
            {
                List<PolylineVertex> polylineVertexes = new List<PolylineVertex>();
                foreach (Vertex v in vertexes)
                {
                    PolylineVertex vertex = new PolylineVertex
                                                {
                                                    Location = new Vector2f(v.Location.X, v.Location.Y),
                                                    BeginThickness = v.BeginThickness,
                                                    Bulge = v.Bulge,
                                                    Color = v.Color,
                                                    EndThickness = v.EndThickness,
                                                    Layer = v.Layer,
                                                    LineType = v.LineType,
                                                    Handle = v.Handle
                                                };
                    vertex.XData = xData;

                    ////posible error avoidance, the polyline is marked as polyline code:(70,0) but the vertex is marked as Polyline3dVertex code:(70,32)
                    //if (v.Type==EntityType.Polyline3dVertex)
                    //{
                    //    PolylineVertex polylineVertex = new PolylineVertex(((Polyline3dVertex)v).Location.X, ((Polyline3dVertex)v).Location.Y);
                    //    polylineVertexes.Add(polylineVertex);
                    //}
                    //else
                    //{
                    //    polylineVertexes.Add((PolylineVertex) v);
                    //}
                    polylineVertexes.Add(vertex);
                }

                pol = new Polyline(polylineVertexes, isClosed)
                          {
                              Thickness = thickness,
                              Elevation = elevation,
                              Normal = normal,
                              Handle = handle
                          };
                ((Polyline) pol).EndSequence.Handle = endSequenceHandle;
                ((Polyline) pol).EndSequence.Layer = endSequenceLayer;
            }

            pol.Color = color;
            pol.Layer = layer;
            pol.LineType = lineType;
            pol.XData = xData;

            return pol;
        }
Exemple #3
0
        private void WritePolyfaceMesh(PolyfaceMesh mesh)
        {
            if (this.activeSection != StringCode.EntitiesSection && !this.isBlockEntities)
            {
                throw new InvalidDxfSectionException(this.activeSection, this.file);
            }

            this.WriteCodePair(0, mesh.CodeName);
            this.WriteCodePair(100, SubclassMarker.Entity);
            this.WriteEntityCommonCodes(mesh);
            this.WriteCodePair(5, mesh.Handle);
            this.WriteCodePair(100, SubclassMarker.PolyfaceMesh);

            this.WriteCodePair(70, (int) mesh.Flags);

            this.WriteCodePair(71, mesh.Vertexes.Count);

            this.WriteCodePair(72, mesh.Faces.Count);

            //dummy point
            this.WriteCodePair(10, 0.0);
            this.WriteCodePair(20, 0.0);
            this.WriteCodePair(30, 0.0);

            //Obsolete; formerly an “entities follow flag” (optional; ignore if present)
            //but its needed to load the dxf file in AutoCAD
            this.WriteCodePair(66, "1");

            if (mesh.XData != null)
            {
                this.WriteXData(mesh.XData);
            }

            foreach (PolyfaceMeshVertex v in mesh.Vertexes)
            {
                this.WriteCodePair(0, v.CodeName);
                this.WriteCodePair(5, v.Handle);
                this.WriteCodePair(100, SubclassMarker.Entity);
                this.WriteCodePair(8, v.Layer);
                this.WriteCodePair(100, SubclassMarker.Vertex);
                this.WriteCodePair(100, SubclassMarker.PolyfaceMeshVertex);
                this.WriteCodePair(70, (int) v.Flags);
                this.WriteCodePair(10, v.Location.X);
                this.WriteCodePair(20, v.Location.Y);
                this.WriteCodePair(30, v.Location.Z);

                this.WriteXData(v.XData);
            }

            foreach (PolyfaceMeshFace face in mesh.Faces)
            {
                this.WriteCodePair(0, face.CodeName);
                this.WriteCodePair(5, face.Handle);
                this.WriteCodePair(100, SubclassMarker.Entity);
                this.WriteCodePair(8, face.Layer);
                this.WriteCodePair(100, SubclassMarker.PolyfaceMeshFace);
                this.WriteCodePair(70, (int) VertexTypeFlags.PolyfaceMeshVertex);
                this.WriteCodePair(10, 0);
                this.WriteCodePair(20, 0);
                this.WriteCodePair(30, 0);

                this.WriteCodePair(71, face.VertexIndexes[0]);
                this.WriteCodePair(72, face.VertexIndexes[1]);
                this.WriteCodePair(73, face.VertexIndexes[2]);
            }

            this.WriteCodePair(0, mesh.EndSequence.CodeName);
            this.WriteCodePair(5, mesh.EndSequence.Handle);
            this.WriteCodePair(100, SubclassMarker.Entity);
            this.WriteCodePair(8, mesh.EndSequence.Layer);
        }