/// <summary>
/// Convert a netDXF mesh to a Nucleus mesh
/// </summary>
/// <param name="mesh"></param>
/// <returns></returns>
public static Mesh Convert(nDE.Mesh mesh)
{
var result = new Mesh();
// Vertices:
for (int i = 0; i < mesh.Vertexes.Count; i++)
{
result.AddVertex(Convert(mesh.Vertexes[i]));
}
// Faces:
for (int i = 0; i < mesh.Faces.Count; i++)
{
result.AddFace(mesh.Faces[i]);
}
return(result);
}
/// <summary>
/// Convert a netDXF mesh to a Nucleus mesh
/// </summary>
/// <param name="mesh"></param>
/// <returns></returns>
public static Mesh Convert(nDE.Mesh mesh)
{
var result = new Mesh();
// Vertices:
for (int i = 0; i < mesh.Vertexes.Count; i++)
{
result.AddVertex(Convert(mesh.Vertexes[i]));
}
// Faces:
for (int i = 0; i < mesh.Faces.Count; i++)
{
var indices = mesh.Faces[i];
indices.AddToAll(-1); // Make zero-indexed
result.AddFace(indices);
}
return result;
}
/// <summary>
/// Convert a .Nucleus mesh into a netDXF equivalent
/// </summary>
/// <param name="mesh"></param>
/// <returns></returns>
public static nDE.Mesh Convert(Mesh mesh)
{
mesh.Vertices.AssignVertexIndices(0);
var vertices = new List <Vector3>(mesh.VertexCount);
foreach (var vertex in mesh.Vertices)
{
vertices.Add(Convert(vertex.Position));
}
var faces = new List <int[]>(mesh.FaceCount);
foreach (var face in mesh.Faces)
{
faces.Add(face.ToIndexArray());
}
var result = new nDE.Mesh(vertices, faces);
return(result);
}
/// <summary>
/// Creates a new Mesh that is a copy of the current instance.
/// </summary>
/// <returns>A new Mesh that is a copy of this instance.</returns>
public override object Clone()
{
List<Vector3> copyVertexes = new List<Vector3>(this.vertexes.Count);
List<int[]> copyFaces = new List<int[]>(this.faces.Count);
List<MeshEdge> copyEdges = null;
copyVertexes.AddRange(this.vertexes.ToArray());
foreach (int[] face in this.faces)
{
int[] copyFace = new int[face.Length];
face.CopyTo(copyFace, 0);
copyFaces.Add(copyFace);
}
if (this.edges != null)
{
copyEdges = new List<MeshEdge>(this.edges.Count);
foreach (MeshEdge meshEdge in this.edges)
{
copyEdges.Add((MeshEdge) meshEdge.Clone());
}
}
Mesh entity = new Mesh(copyVertexes, copyFaces, copyEdges)
{
//EntityObject properties
Layer = (Layer)this.layer.Clone(),
LineType = (LineType)this.lineType.Clone(),
Color = (AciColor)this.color.Clone(),
Lineweight = (Lineweight)this.lineweight.Clone(),
Transparency = (Transparency)this.transparency.Clone(),
LineTypeScale = this.lineTypeScale,
Normal = this.normal,
//Mesh properties
SubdivisionLevel = this.subdivisionLevel
};
foreach (XData data in this.XData.Values)
entity.XData.Add((XData)data.Clone());
return entity;
}
private void WriteMesh(Mesh mesh)
{
this.chunk.Write(100, SubclassMarker.Mesh);
this.chunk.Write(71, (short) 2);
this.chunk.Write(72, (short) 0);
this.chunk.Write(91, (int) mesh.SubdivisionLevel);
//vertexes
this.chunk.Write(92, mesh.Vertexes.Count);
foreach (Vector3 vertex in mesh.Vertexes)
{
this.chunk.Write(10, vertex.X);
this.chunk.Write(20, vertex.Y);
this.chunk.Write(30, vertex.Z);
}
//faces
int sizeFaceList = mesh.Faces.Count;
foreach (int[] face in mesh.Faces)
{
sizeFaceList += face.Length;
}
this.chunk.Write(93, sizeFaceList);
foreach (int[] face in mesh.Faces)
{
this.chunk.Write(90, face.Length);
foreach (int index in face)
{
this.chunk.Write(90, index);
}
}
// the edges information is optional, and only really useful when it is required to assign creases values to edges
if (mesh.Edges != null)
{
//edges
this.chunk.Write(94, mesh.Edges.Count);
foreach (MeshEdge edge in mesh.Edges)
{
this.chunk.Write(90, edge.StartVertexIndex);
this.chunk.Write(90, edge.EndVertexIndex);
}
//creases
this.chunk.Write(95, mesh.Edges.Count);
foreach (MeshEdge edge in mesh.Edges)
{
this.chunk.Write(140, edge.Crease);
}
}
this.chunk.Write(90, 0);
this.WriteXData(mesh.XData);
}
private Mesh ReadMesh()
{
int subdivisionLevel = 0;
List<Vector3> vertexes = null;
List<int[]> faces = null;
List<MeshEdge> edges = null;
List<XData> xData = new List<XData>();
while (this.chunk.Code != 0)
{
switch (this.chunk.Code)
{
case 91:
subdivisionLevel = this.chunk.ReadInt();
if (subdivisionLevel < 0 || subdivisionLevel > 255)
subdivisionLevel = 0;
this.chunk.Next();
break;
case 92:
int numVertexes = this.chunk.ReadInt();
this.chunk.Next();
vertexes = this.ReadMeshVertexes(numVertexes);
break;
case 93:
int sizeFaceList = this.chunk.ReadInt();
this.chunk.Next();
faces = this.ReadMeshFaces(sizeFaceList);
break;
case 94:
int numEdges = this.chunk.ReadInt();
this.chunk.Next();
edges = this.ReadMeshEdges(numEdges);
break;
case 95:
int numCrease = this.chunk.ReadInt();
this.chunk.Next();
if (edges == null)
throw new NullReferenceException("The edges list is not initialized.");
if (numCrease != edges.Count)
throw new Exception("The number of edge creases must be the same as the number of edges.");
this.ReadMeshEdgeCreases(edges);
break;
case 1001:
string appId = this.DecodeEncodedNonAsciiCharacters(this.chunk.ReadString());
XData data = this.ReadXDataRecord(this.GetApplicationRegistry(appId));
xData.Add(data);
break;
default:
if (this.chunk.Code >= 1000 && this.chunk.Code <= 1071)
throw new Exception("The extended data of an entity must start with the application registry code.");
this.chunk.Next();
break;
}
}
Mesh entity = new Mesh(vertexes, faces, edges)
{
SubdivisionLevel = (byte) subdivisionLevel,
};
entity.XData.AddRange(xData);
return entity;
}
private static void MeshEntity()
{
DxfDocument dxf = new DxfDocument();
// construct a simple cube (see the AutoCad documentation for more information about creating meshes)
// the mesh data is always defined at level 0 (no subdivision)
// 8 vertices
List<Vector3> vertexes = new List<Vector3>
{
new Vector3(-5, -5, -5),
new Vector3(5, -5, -5),
new Vector3(5, 5, -5),
new Vector3(-5, 5, -5),
new Vector3(-5, -5, 5),
new Vector3(5, -5, 5),
new Vector3(5, 5, 5),
new Vector3(-5, 5, 5)
};
//6 faces
List<int[]> faces = new List<int[]>
{
new[] {0, 3, 2, 1},
new[] {0, 1, 5, 4},
new[] {1, 2, 6, 5},
new[] {2, 3, 7, 6},
new[] {0, 4, 7, 3},
new[] {4, 5, 6, 7}
};
// the list of edges is optional and only really needed when applying creases values to them
// crease negative values will sharpen the edge independently of the subdivision level. Any negative crease value will be reseted as -1.
// by default edge creases are set to 0.0 (no edge sharpening)
List<MeshEdge> edges = new List<MeshEdge>
{
new MeshEdge(0, 1),
new MeshEdge(1, 2),
new MeshEdge(2, 3),
new MeshEdge(3, 0),
new MeshEdge(4, 5, -1.0),
new MeshEdge(5, 6, -1.0),
new MeshEdge(6, 7, -1.0),
new MeshEdge(7, 4, -1.0),
new MeshEdge(0, 4),
new MeshEdge(1, 5),
new MeshEdge(2, 6),
new MeshEdge(3, 7)
};
Mesh mesh = new Mesh(vertexes, faces, edges);
mesh.SubdivisionLevel = 3;
ApplicationRegistry newAppReg = dxf.ApplicationRegistries.Add(new ApplicationRegistry("netDxf"));
XData xdata = new XData(newAppReg);
xdata.XDataRecord.Add(new XDataRecord(XDataCode.String, "xdata string sample"));
xdata.XDataRecord.Add(new XDataRecord(XDataCode.Int32, 50000));
mesh.XData.Add(xdata);
dxf.AddEntity(mesh);
dxf.Save("mesh.dxf");
dxf = DxfDocument.Load("mesh.dxf");
}